mirror of
https://github.com/python/cpython.git
synced 2024-12-06 00:05:32 +08:00
186 lines
7.7 KiB
Python
Executable File
186 lines
7.7 KiB
Python
Executable File
#!/usr/bin/env python
|
|
## vim:ts=4:et:nowrap
|
|
"""A user-defined wrapper around string objects
|
|
|
|
Note: string objects have grown methods in Python 1.6
|
|
This module requires Python 1.6 or later.
|
|
"""
|
|
from types import StringTypes
|
|
import sys
|
|
|
|
__all__ = ["UserString","MutableString"]
|
|
|
|
class UserString:
|
|
def __init__(self, seq):
|
|
if isinstance(seq, StringTypes):
|
|
self.data = seq
|
|
elif isinstance(seq, UserString):
|
|
self.data = seq.data[:]
|
|
else:
|
|
self.data = str(seq)
|
|
def __str__(self): return str(self.data)
|
|
def __repr__(self): return repr(self.data)
|
|
def __int__(self): return int(self.data)
|
|
def __long__(self): return long(self.data)
|
|
def __float__(self): return float(self.data)
|
|
def __complex__(self): return complex(self.data)
|
|
def __hash__(self): return hash(self.data)
|
|
|
|
def __cmp__(self, string):
|
|
if isinstance(string, UserString):
|
|
return cmp(self.data, string.data)
|
|
else:
|
|
return cmp(self.data, string)
|
|
def __contains__(self, char):
|
|
return char in self.data
|
|
|
|
def __len__(self): return len(self.data)
|
|
def __getitem__(self, index): return self.__class__(self.data[index])
|
|
def __getslice__(self, start, end):
|
|
start = max(start, 0); end = max(end, 0)
|
|
return self.__class__(self.data[start:end])
|
|
|
|
def __add__(self, other):
|
|
if isinstance(other, UserString):
|
|
return self.__class__(self.data + other.data)
|
|
elif isinstance(other, StringTypes):
|
|
return self.__class__(self.data + other)
|
|
else:
|
|
return self.__class__(self.data + str(other))
|
|
def __radd__(self, other):
|
|
if isinstance(other, StringTypes):
|
|
return self.__class__(other + self.data)
|
|
else:
|
|
return self.__class__(str(other) + self.data)
|
|
def __mul__(self, n):
|
|
return self.__class__(self.data*n)
|
|
__rmul__ = __mul__
|
|
def __mod__(self, args):
|
|
return self.__class__(self.data % args)
|
|
|
|
# the following methods are defined in alphabetical order:
|
|
def capitalize(self): return self.__class__(self.data.capitalize())
|
|
def center(self, width, *args):
|
|
return self.__class__(self.data.center(width, *args))
|
|
def count(self, sub, start=0, end=sys.maxint):
|
|
return self.data.count(sub, start, end)
|
|
def decode(self, encoding=None, errors=None): # XXX improve this?
|
|
if encoding:
|
|
if errors:
|
|
return self.__class__(self.data.decode(encoding, errors))
|
|
else:
|
|
return self.__class__(self.data.decode(encoding))
|
|
else:
|
|
return self.__class__(self.data.decode())
|
|
def encode(self, encoding=None, errors=None): # XXX improve this?
|
|
if encoding:
|
|
if errors:
|
|
return self.__class__(self.data.encode(encoding, errors))
|
|
else:
|
|
return self.__class__(self.data.encode(encoding))
|
|
else:
|
|
return self.__class__(self.data.encode())
|
|
def endswith(self, suffix, start=0, end=sys.maxint):
|
|
return self.data.endswith(suffix, start, end)
|
|
def expandtabs(self, tabsize=8):
|
|
return self.__class__(self.data.expandtabs(tabsize))
|
|
def find(self, sub, start=0, end=sys.maxint):
|
|
return self.data.find(sub, start, end)
|
|
def index(self, sub, start=0, end=sys.maxint):
|
|
return self.data.index(sub, start, end)
|
|
def isalpha(self): return self.data.isalpha()
|
|
def isalnum(self): return self.data.isalnum()
|
|
def isdecimal(self): return self.data.isdecimal()
|
|
def isdigit(self): return self.data.isdigit()
|
|
def islower(self): return self.data.islower()
|
|
def isnumeric(self): return self.data.isnumeric()
|
|
def isspace(self): return self.data.isspace()
|
|
def istitle(self): return self.data.istitle()
|
|
def isupper(self): return self.data.isupper()
|
|
def join(self, seq): return self.data.join(seq)
|
|
def ljust(self, width, *args):
|
|
return self.__class__(self.data.ljust(width, *args))
|
|
def lower(self): return self.__class__(self.data.lower())
|
|
def lstrip(self, chars=None): return self.__class__(self.data.lstrip(chars))
|
|
def replace(self, old, new, maxsplit=-1):
|
|
return self.__class__(self.data.replace(old, new, maxsplit))
|
|
def rfind(self, sub, start=0, end=sys.maxint):
|
|
return self.data.rfind(sub, start, end)
|
|
def rindex(self, sub, start=0, end=sys.maxint):
|
|
return self.data.rindex(sub, start, end)
|
|
def rjust(self, width, *args):
|
|
return self.__class__(self.data.rjust(width, *args))
|
|
def rstrip(self, chars=None): return self.__class__(self.data.rstrip(chars))
|
|
def split(self, sep=None, maxsplit=-1):
|
|
return self.data.split(sep, maxsplit)
|
|
def splitlines(self, keepends=0): return self.data.splitlines(keepends)
|
|
def startswith(self, prefix, start=0, end=sys.maxint):
|
|
return self.data.startswith(prefix, start, end)
|
|
def strip(self, chars=None): return self.__class__(self.data.strip(chars))
|
|
def swapcase(self): return self.__class__(self.data.swapcase())
|
|
def title(self): return self.__class__(self.data.title())
|
|
def translate(self, *args):
|
|
return self.__class__(self.data.translate(*args))
|
|
def upper(self): return self.__class__(self.data.upper())
|
|
def zfill(self, width): return self.__class__(self.data.zfill(width))
|
|
|
|
class MutableString(UserString):
|
|
"""mutable string objects
|
|
|
|
Python strings are immutable objects. This has the advantage, that
|
|
strings may be used as dictionary keys. If this property isn't needed
|
|
and you insist on changing string values in place instead, you may cheat
|
|
and use MutableString.
|
|
|
|
But the purpose of this class is an educational one: to prevent
|
|
people from inventing their own mutable string class derived
|
|
from UserString and than forget thereby to remove (override) the
|
|
__hash__ method inherited from UserString. This would lead to
|
|
errors that would be very hard to track down.
|
|
|
|
A faster and better solution is to rewrite your program using lists."""
|
|
def __init__(self, string=""):
|
|
self.data = string
|
|
def __hash__(self):
|
|
raise TypeError, "unhashable type (it is mutable)"
|
|
def __setitem__(self, index, sub):
|
|
if index < 0 or index >= len(self.data): raise IndexError
|
|
self.data = self.data[:index] + sub + self.data[index+1:]
|
|
def __delitem__(self, index):
|
|
if index < 0 or index >= len(self.data): raise IndexError
|
|
self.data = self.data[:index] + self.data[index+1:]
|
|
def __setslice__(self, start, end, sub):
|
|
start = max(start, 0); end = max(end, 0)
|
|
if isinstance(sub, UserString):
|
|
self.data = self.data[:start]+sub.data+self.data[end:]
|
|
elif isinstance(sub, StringTypes):
|
|
self.data = self.data[:start]+sub+self.data[end:]
|
|
else:
|
|
self.data = self.data[:start]+str(sub)+self.data[end:]
|
|
def __delslice__(self, start, end):
|
|
start = max(start, 0); end = max(end, 0)
|
|
self.data = self.data[:start] + self.data[end:]
|
|
def immutable(self):
|
|
return UserString(self.data)
|
|
def __iadd__(self, other):
|
|
if isinstance(other, UserString):
|
|
self.data += other.data
|
|
elif isinstance(other, StringTypes):
|
|
self.data += other
|
|
else:
|
|
self.data += str(other)
|
|
return self
|
|
def __imul__(self, n):
|
|
self.data *= n
|
|
return self
|
|
|
|
if __name__ == "__main__":
|
|
# execute the regression test to stdout, if called as a script:
|
|
import os
|
|
called_in_dir, called_as = os.path.split(sys.argv[0])
|
|
called_as, py = os.path.splitext(called_as)
|
|
if '-q' in sys.argv:
|
|
from test import test_support
|
|
test_support.verbose = 0
|
|
__import__('test.test_' + called_as.lower())
|