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58753f33e4
Problem occurred when attribute xyz could not be pickled. Since this is not trivial to selectively fix, block all attributes (other than 'width'). IDLE does not access them and they are private implementation details.
654 lines
21 KiB
Python
654 lines
21 KiB
Python
""" idlelib.run
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Simplified, pyshell.ModifiedInterpreter spawns a subprocess with
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f'''{sys.executable} -c "__import__('idlelib.run').run.main()"'''
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'.run' is needed because __import__ returns idlelib, not idlelib.run.
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"""
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import contextlib
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import functools
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import io
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import linecache
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import queue
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import sys
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import textwrap
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import time
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import traceback
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import _thread as thread
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import threading
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import warnings
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import idlelib # testing
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from idlelib import autocomplete # AutoComplete, fetch_encodings
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from idlelib import calltip # Calltip
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from idlelib import debugger_r # start_debugger
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from idlelib import debugobj_r # remote_object_tree_item
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from idlelib import iomenu # encoding
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from idlelib import rpc # multiple objects
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from idlelib import stackviewer # StackTreeItem
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import __main__
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import tkinter # Use tcl and, if startup fails, messagebox.
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if not hasattr(sys.modules['idlelib.run'], 'firstrun'):
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# Undo modifications of tkinter by idlelib imports; see bpo-25507.
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for mod in ('simpledialog', 'messagebox', 'font',
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'dialog', 'filedialog', 'commondialog',
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'ttk'):
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delattr(tkinter, mod)
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del sys.modules['tkinter.' + mod]
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# Avoid AttributeError if run again; see bpo-37038.
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sys.modules['idlelib.run'].firstrun = False
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LOCALHOST = '127.0.0.1'
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try:
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eof = 'Ctrl-D (end-of-file)'
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exit.eof = eof
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quit.eof = eof
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except NameError: # In case subprocess started with -S (maybe in future).
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pass
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def idle_formatwarning(message, category, filename, lineno, line=None):
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"""Format warnings the IDLE way."""
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s = "\nWarning (from warnings module):\n"
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s += f' File \"{filename}\", line {lineno}\n'
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if line is None:
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line = linecache.getline(filename, lineno)
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line = line.strip()
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if line:
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s += " %s\n" % line
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s += f"{category.__name__}: {message}\n"
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return s
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def idle_showwarning_subproc(
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message, category, filename, lineno, file=None, line=None):
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"""Show Idle-format warning after replacing warnings.showwarning.
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The only difference is the formatter called.
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"""
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if file is None:
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file = sys.stderr
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try:
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file.write(idle_formatwarning(
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message, category, filename, lineno, line))
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except OSError:
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pass # the file (probably stderr) is invalid - this warning gets lost.
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_warnings_showwarning = None
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def capture_warnings(capture):
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"Replace warning.showwarning with idle_showwarning_subproc, or reverse."
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global _warnings_showwarning
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if capture:
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if _warnings_showwarning is None:
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_warnings_showwarning = warnings.showwarning
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warnings.showwarning = idle_showwarning_subproc
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else:
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if _warnings_showwarning is not None:
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warnings.showwarning = _warnings_showwarning
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_warnings_showwarning = None
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capture_warnings(True)
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if idlelib.testing:
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# gh-121008: When testing IDLE, don't create a Tk object to avoid side
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# effects such as installing a PyOS_InputHook hook.
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def handle_tk_events():
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pass
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else:
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tcl = tkinter.Tcl()
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def handle_tk_events(tcl=tcl):
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"""Process any tk events that are ready to be dispatched if tkinter
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has been imported, a tcl interpreter has been created and tk has been
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loaded."""
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tcl.eval("update")
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# Thread shared globals: Establish a queue between a subthread (which handles
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# the socket) and the main thread (which runs user code), plus global
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# completion, exit and interruptable (the main thread) flags:
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exit_now = False
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quitting = False
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interruptable = False
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def main(del_exitfunc=False):
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"""Start the Python execution server in a subprocess
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In the Python subprocess, RPCServer is instantiated with handlerclass
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MyHandler, which inherits register/unregister methods from RPCHandler via
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the mix-in class SocketIO.
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When the RPCServer 'server' is instantiated, the TCPServer initialization
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creates an instance of run.MyHandler and calls its handle() method.
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handle() instantiates a run.Executive object, passing it a reference to the
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MyHandler object. That reference is saved as attribute rpchandler of the
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Executive instance. The Executive methods have access to the reference and
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can pass it on to entities that they command
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(e.g. debugger_r.Debugger.start_debugger()). The latter, in turn, can
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call MyHandler(SocketIO) register/unregister methods via the reference to
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register and unregister themselves.
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"""
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global exit_now
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global quitting
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global no_exitfunc
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no_exitfunc = del_exitfunc
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#time.sleep(15) # test subprocess not responding
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try:
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assert(len(sys.argv) > 1)
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port = int(sys.argv[-1])
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except:
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print("IDLE Subprocess: no IP port passed in sys.argv.",
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file=sys.__stderr__)
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return
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capture_warnings(True)
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sys.argv[:] = [""]
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threading.Thread(target=manage_socket,
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name='SockThread',
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args=((LOCALHOST, port),),
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daemon=True,
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).start()
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while True:
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try:
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if exit_now:
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try:
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exit()
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except KeyboardInterrupt:
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# exiting but got an extra KBI? Try again!
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continue
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try:
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request = rpc.request_queue.get(block=True, timeout=0.05)
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except queue.Empty:
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request = None
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# Issue 32207: calling handle_tk_events here adds spurious
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# queue.Empty traceback to event handling exceptions.
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if request:
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seq, (method, args, kwargs) = request
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ret = method(*args, **kwargs)
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rpc.response_queue.put((seq, ret))
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else:
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handle_tk_events()
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except KeyboardInterrupt:
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if quitting:
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exit_now = True
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continue
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except SystemExit:
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capture_warnings(False)
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raise
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except:
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type, value, tb = sys.exc_info()
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try:
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print_exception()
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rpc.response_queue.put((seq, None))
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except:
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# Link didn't work, print same exception to __stderr__
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traceback.print_exception(type, value, tb, file=sys.__stderr__)
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exit()
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else:
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continue
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def manage_socket(address):
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for i in range(3):
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time.sleep(i)
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try:
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server = MyRPCServer(address, MyHandler)
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break
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except OSError as err:
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print("IDLE Subprocess: OSError: " + err.args[1] +
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", retrying....", file=sys.__stderr__)
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socket_error = err
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else:
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print("IDLE Subprocess: Connection to "
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"IDLE GUI failed, exiting.", file=sys.__stderr__)
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show_socket_error(socket_error, address)
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global exit_now
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exit_now = True
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return
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server.handle_request() # A single request only
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def show_socket_error(err, address):
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"Display socket error from manage_socket."
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import tkinter
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from tkinter.messagebox import showerror
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root = tkinter.Tk()
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fix_scaling(root)
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root.withdraw()
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showerror(
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"Subprocess Connection Error",
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f"IDLE's subprocess can't connect to {address[0]}:{address[1]}.\n"
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f"Fatal OSError #{err.errno}: {err.strerror}.\n"
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"See the 'Startup failure' section of the IDLE doc, online at\n"
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"https://docs.python.org/3/library/idle.html#startup-failure",
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parent=root)
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root.destroy()
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def get_message_lines(typ, exc, tb):
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"Return line composing the exception message."
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if typ in (AttributeError, NameError):
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# 3.10+ hints are not directly accessible from python (#44026).
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err = io.StringIO()
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with contextlib.redirect_stderr(err):
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sys.__excepthook__(typ, exc, tb)
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return [err.getvalue().split("\n")[-2] + "\n"]
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else:
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return traceback.format_exception_only(typ, exc)
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def print_exception():
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import linecache
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linecache.checkcache()
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flush_stdout()
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efile = sys.stderr
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typ, val, tb = excinfo = sys.exc_info()
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sys.last_type, sys.last_value, sys.last_traceback = excinfo
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sys.last_exc = val
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seen = set()
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def print_exc(typ, exc, tb):
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seen.add(id(exc))
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context = exc.__context__
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cause = exc.__cause__
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if cause is not None and id(cause) not in seen:
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print_exc(type(cause), cause, cause.__traceback__)
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print("\nThe above exception was the direct cause "
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"of the following exception:\n", file=efile)
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elif (context is not None and
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not exc.__suppress_context__ and
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id(context) not in seen):
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print_exc(type(context), context, context.__traceback__)
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print("\nDuring handling of the above exception, "
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"another exception occurred:\n", file=efile)
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if tb:
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tbe = traceback.extract_tb(tb)
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print('Traceback (most recent call last):', file=efile)
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exclude = ("run.py", "rpc.py", "threading.py", "queue.py",
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"debugger_r.py", "bdb.py")
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cleanup_traceback(tbe, exclude)
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traceback.print_list(tbe, file=efile)
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lines = get_message_lines(typ, exc, tb)
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for line in lines:
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print(line, end='', file=efile)
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print_exc(typ, val, tb)
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def cleanup_traceback(tb, exclude):
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"Remove excluded traces from beginning/end of tb; get cached lines"
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orig_tb = tb[:]
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while tb:
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for rpcfile in exclude:
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if tb[0][0].count(rpcfile):
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break # found an exclude, break for: and delete tb[0]
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else:
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break # no excludes, have left RPC code, break while:
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del tb[0]
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while tb:
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for rpcfile in exclude:
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if tb[-1][0].count(rpcfile):
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break
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else:
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break
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del tb[-1]
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if len(tb) == 0:
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# exception was in IDLE internals, don't prune!
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tb[:] = orig_tb[:]
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print("** IDLE Internal Exception: ", file=sys.stderr)
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rpchandler = rpc.objecttable['exec'].rpchandler
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for i in range(len(tb)):
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fn, ln, nm, line = tb[i]
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if nm == '?':
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nm = "-toplevel-"
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if not line and fn.startswith("<pyshell#"):
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line = rpchandler.remotecall('linecache', 'getline',
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(fn, ln), {})
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tb[i] = fn, ln, nm, line
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def flush_stdout():
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"""XXX How to do this now?"""
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def exit():
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"""Exit subprocess, possibly after first clearing exit functions.
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If config-main.cfg/.def 'General' 'delete-exitfunc' is True, then any
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functions registered with atexit will be removed before exiting.
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(VPython support)
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"""
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if no_exitfunc:
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import atexit
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atexit._clear()
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capture_warnings(False)
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sys.exit(0)
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def fix_scaling(root):
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"""Scale fonts on HiDPI displays."""
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import tkinter.font
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scaling = float(root.tk.call('tk', 'scaling'))
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if scaling > 1.4:
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for name in tkinter.font.names(root):
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font = tkinter.font.Font(root=root, name=name, exists=True)
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size = int(font['size'])
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if size < 0:
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font['size'] = round(-0.75*size)
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def fixdoc(fun, text):
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tem = (fun.__doc__ + '\n\n') if fun.__doc__ is not None else ''
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fun.__doc__ = tem + textwrap.fill(textwrap.dedent(text))
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RECURSIONLIMIT_DELTA = 30
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def install_recursionlimit_wrappers():
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"""Install wrappers to always add 30 to the recursion limit."""
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# see: bpo-26806
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@functools.wraps(sys.setrecursionlimit)
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def setrecursionlimit(*args, **kwargs):
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# mimic the original sys.setrecursionlimit()'s input handling
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if kwargs:
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raise TypeError(
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"setrecursionlimit() takes no keyword arguments")
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try:
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limit, = args
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except ValueError:
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raise TypeError(f"setrecursionlimit() takes exactly one "
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f"argument ({len(args)} given)")
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if not limit > 0:
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raise ValueError(
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"recursion limit must be greater or equal than 1")
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return setrecursionlimit.__wrapped__(limit + RECURSIONLIMIT_DELTA)
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fixdoc(setrecursionlimit, f"""\
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This IDLE wrapper adds {RECURSIONLIMIT_DELTA} to prevent possible
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uninterruptible loops.""")
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@functools.wraps(sys.getrecursionlimit)
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def getrecursionlimit():
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return getrecursionlimit.__wrapped__() - RECURSIONLIMIT_DELTA
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fixdoc(getrecursionlimit, f"""\
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This IDLE wrapper subtracts {RECURSIONLIMIT_DELTA} to compensate
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for the {RECURSIONLIMIT_DELTA} IDLE adds when setting the limit.""")
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# add the delta to the default recursion limit, to compensate
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sys.setrecursionlimit(sys.getrecursionlimit() + RECURSIONLIMIT_DELTA)
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sys.setrecursionlimit = setrecursionlimit
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sys.getrecursionlimit = getrecursionlimit
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def uninstall_recursionlimit_wrappers():
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"""Uninstall the recursion limit wrappers from the sys module.
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IDLE only uses this for tests. Users can import run and call
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this to remove the wrapping.
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"""
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if (
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getattr(sys.setrecursionlimit, '__wrapped__', None) and
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getattr(sys.getrecursionlimit, '__wrapped__', None)
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):
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sys.setrecursionlimit = sys.setrecursionlimit.__wrapped__
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sys.getrecursionlimit = sys.getrecursionlimit.__wrapped__
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sys.setrecursionlimit(sys.getrecursionlimit() - RECURSIONLIMIT_DELTA)
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class MyRPCServer(rpc.RPCServer):
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def handle_error(self, request, client_address):
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"""Override RPCServer method for IDLE
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Interrupt the MainThread and exit server if link is dropped.
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"""
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global quitting
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try:
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raise
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except SystemExit:
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raise
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except EOFError:
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global exit_now
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exit_now = True
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thread.interrupt_main()
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except:
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erf = sys.__stderr__
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print(textwrap.dedent(f"""
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{'-'*40}
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Unhandled exception in user code execution server!'
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Thread: {threading.current_thread().name}
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IDLE Client Address: {client_address}
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Request: {request!r}
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"""), file=erf)
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traceback.print_exc(limit=-20, file=erf)
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print(textwrap.dedent(f"""
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*** Unrecoverable, server exiting!
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Users should never see this message; it is likely transient.
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If this recurs, report this with a copy of the message
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and an explanation of how to make it repeat.
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{'-'*40}"""), file=erf)
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quitting = True
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thread.interrupt_main()
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# Pseudofiles for shell-remote communication (also used in pyshell)
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class StdioFile(io.TextIOBase):
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def __init__(self, shell, tags, encoding='utf-8', errors='strict'):
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self.shell = shell
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# GH-78889: accessing unpickleable attributes freezes Shell.
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# IDLE only needs methods; allow 'width' for possible use.
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self.shell._RPCProxy__attributes = {'width': 1}
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self.tags = tags
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self._encoding = encoding
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self._errors = errors
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@property
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def encoding(self):
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return self._encoding
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@property
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def errors(self):
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return self._errors
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@property
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def name(self):
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return '<%s>' % self.tags
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def isatty(self):
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return True
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class StdOutputFile(StdioFile):
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def writable(self):
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return True
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def write(self, s):
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if self.closed:
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raise ValueError("write to closed file")
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s = str.encode(s, self.encoding, self.errors).decode(self.encoding, self.errors)
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return self.shell.write(s, self.tags)
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class StdInputFile(StdioFile):
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_line_buffer = ''
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def readable(self):
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return True
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def read(self, size=-1):
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if self.closed:
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raise ValueError("read from closed file")
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if size is None:
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size = -1
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elif not isinstance(size, int):
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raise TypeError('must be int, not ' + type(size).__name__)
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result = self._line_buffer
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self._line_buffer = ''
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if size < 0:
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while line := self.shell.readline():
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result += line
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else:
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while len(result) < size:
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line = self.shell.readline()
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if not line: break
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result += line
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self._line_buffer = result[size:]
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result = result[:size]
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return result
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def readline(self, size=-1):
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if self.closed:
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raise ValueError("read from closed file")
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if size is None:
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size = -1
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elif not isinstance(size, int):
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raise TypeError('must be int, not ' + type(size).__name__)
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line = self._line_buffer or self.shell.readline()
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if size < 0:
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size = len(line)
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eol = line.find('\n', 0, size)
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if eol >= 0:
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size = eol + 1
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self._line_buffer = line[size:]
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return line[:size]
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def close(self):
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self.shell.close()
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class MyHandler(rpc.RPCHandler):
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def handle(self):
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"""Override base method"""
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executive = Executive(self)
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self.register("exec", executive)
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self.console = self.get_remote_proxy("console")
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sys.stdin = StdInputFile(self.console, "stdin",
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iomenu.encoding, iomenu.errors)
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sys.stdout = StdOutputFile(self.console, "stdout",
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iomenu.encoding, iomenu.errors)
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sys.stderr = StdOutputFile(self.console, "stderr",
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iomenu.encoding, "backslashreplace")
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sys.displayhook = rpc.displayhook
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# page help() text to shell.
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import pydoc # import must be done here to capture i/o binding
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pydoc.pager = pydoc.plainpager
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# Keep a reference to stdin so that it won't try to exit IDLE if
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# sys.stdin gets changed from within IDLE's shell. See issue17838.
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self._keep_stdin = sys.stdin
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install_recursionlimit_wrappers()
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self.interp = self.get_remote_proxy("interp")
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rpc.RPCHandler.getresponse(self, myseq=None, wait=0.05)
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def exithook(self):
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"override SocketIO method - wait for MainThread to shut us down"
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time.sleep(10)
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|
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def EOFhook(self):
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"Override SocketIO method - terminate wait on callback and exit thread"
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global quitting
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quitting = True
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thread.interrupt_main()
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|
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def decode_interrupthook(self):
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"interrupt awakened thread"
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global quitting
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quitting = True
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thread.interrupt_main()
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|
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class Executive:
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|
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def __init__(self, rpchandler):
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self.rpchandler = rpchandler
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if idlelib.testing is False:
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self.locals = __main__.__dict__
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self.calltip = calltip.Calltip()
|
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self.autocomplete = autocomplete.AutoComplete()
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else:
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self.locals = {}
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|
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def runcode(self, code):
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global interruptable
|
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try:
|
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self.user_exc_info = None
|
|
interruptable = True
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try:
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exec(code, self.locals)
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finally:
|
|
interruptable = False
|
|
except SystemExit as e:
|
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if e.args: # SystemExit called with an argument.
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ob = e.args[0]
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if not isinstance(ob, (type(None), int)):
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print('SystemExit: ' + str(ob), file=sys.stderr)
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# Return to the interactive prompt.
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except:
|
|
self.user_exc_info = sys.exc_info() # For testing, hook, viewer.
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if quitting:
|
|
exit()
|
|
if sys.excepthook is sys.__excepthook__:
|
|
print_exception()
|
|
else:
|
|
try:
|
|
sys.excepthook(*self.user_exc_info)
|
|
except:
|
|
self.user_exc_info = sys.exc_info() # For testing.
|
|
print_exception()
|
|
jit = self.rpchandler.console.getvar("<<toggle-jit-stack-viewer>>")
|
|
if jit:
|
|
self.rpchandler.interp.open_remote_stack_viewer()
|
|
else:
|
|
flush_stdout()
|
|
|
|
def interrupt_the_server(self):
|
|
if interruptable:
|
|
thread.interrupt_main()
|
|
|
|
def start_the_debugger(self, gui_adap_oid):
|
|
return debugger_r.start_debugger(self.rpchandler, gui_adap_oid)
|
|
|
|
def stop_the_debugger(self, idb_adap_oid):
|
|
"Unregister the Idb Adapter. Link objects and Idb then subject to GC"
|
|
self.rpchandler.unregister(idb_adap_oid)
|
|
|
|
def get_the_calltip(self, name):
|
|
return self.calltip.fetch_tip(name)
|
|
|
|
def get_the_completion_list(self, what, mode):
|
|
return self.autocomplete.fetch_completions(what, mode)
|
|
|
|
def stackviewer(self, flist_oid=None):
|
|
if self.user_exc_info:
|
|
_, exc, tb = self.user_exc_info
|
|
else:
|
|
return None
|
|
flist = None
|
|
if flist_oid is not None:
|
|
flist = self.rpchandler.get_remote_proxy(flist_oid)
|
|
while tb and tb.tb_frame.f_globals["__name__"] in ["rpc", "run"]:
|
|
tb = tb.tb_next
|
|
exc.__traceback__ = tb
|
|
item = stackviewer.StackTreeItem(exc, flist)
|
|
return debugobj_r.remote_object_tree_item(item)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
from unittest import main
|
|
main('idlelib.idle_test.test_run', verbosity=2)
|
|
|
|
capture_warnings(False) # Make sure turned off; see bpo-18081.
|