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Delay import of py_compile until needed, since is is only used by the

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PyZipFile class.

End sentences in docstrings with periods.

Reformat docstrings to be more similar to those of other modules.
This commit is contained in:
Fred Drake 2000-10-02 21:14:52 +00:00
parent 427802470a
commit 484d735f1e
1 changed files with 45 additions and 31 deletions
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76
Lib/zipfile.py
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@ -1,9 +1,9 @@
"Read and write ZIP files"
"Read and write ZIP files."
# Written by James C. Ahlstrom jim@interet.com
# All rights transferred to CNRI pursuant to the Python contribution agreement
import struct, os, time
import binascii, py_compile
import binascii
try:
import zlib # We may need its compression method
@ -27,10 +27,12 @@ stringCentralDir = "PK\001\002" # magic number for central directory
structFileHeader = "<4s2B4H3l2H" # 12 items, file header record, 30 bytes
stringFileHeader = "PK\003\004" # magic number for file header
def is_zipfile(filename):
"""Quickly see if file is a ZIP file by checking the magic number.
Will not accept a ZIP archive with an ending comment."""
Will not accept a ZIP archive with an ending comment.
"""
try:
fpin = open(filename, "rb")
fpin.seek(-22, 2) # Seek to end-of-file record
@ -41,8 +43,10 @@ Will not accept a ZIP archive with an ending comment."""
except:
pass
class ZipInfo:
"Class with attributes describing each file in the ZIP archive"
"""Class with attributes describing each file in the ZIP archive."""
def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
self.filename = filename # Name of the file in the archive
self.date_time = date_time # year, month, day, hour, min, sec
@ -66,7 +70,7 @@ class ZipInfo:
# file_size Size of the uncompressed file
def FileHeader(self):
'Return the per-file header as a string'
"""Return the per-file header as a string."""
dt = self.date_time
dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
dostime = dt[3] << 11 | dt[4] << 5 | dt[5] / 2
@ -86,9 +90,10 @@ class ZipInfo:
class ZipFile:
"Class with methods to open, read, write, close, list zip files"
"""Class with methods to open, read, write, close, list zip files."""
def __init__(self, filename, mode="r", compression=ZIP_STORED):
'Open the ZIP file with mode read "r", write "w" or append "a".'
"""Open the ZIP file with mode read "r", write "w" or append "a"."""
if compression == ZIP_STORED:
pass
elif compression == ZIP_DEFLATED:
@ -123,7 +128,7 @@ class ZipFile:
raise RuntimeError, 'Mode must be "r", "w" or "a"'
def _GetContents(self):
"Read in the table of contents for the zip file"
"""Read in the table of contents for the ZIP file."""
fp = self.fp
fp.seek(-22, 2) # Start of end-of-archive record
filesize = fp.tell() + 22 # Get file size
@ -184,25 +189,26 @@ class ZipFile:
data.filename, fname)
def namelist(self):
"Return a list of file names in the archive"
"""Return a list of file names in the archive."""
l = []
for data in self.filelist:
l.append(data.filename)
return l
def infolist(self):
"Return a list of class ZipInfo instances for files in the archive"
"""Return a list of class ZipInfo instances for files in the
archive."""
return self.filelist
def printdir(self):
"Print a table of contents for the zip file"
"""Print a table of contents for the zip file."""
print "%-46s %19s %12s" % ("File Name", "Modified ", "Size")
for zinfo in self.filelist:
date = "%d-%02d-%02d %02d:%02d:%02d" % zinfo.date_time
print "%-46s %s %12d" % (zinfo.filename, date, zinfo.file_size)
def testzip(self):
"Read all the files and check the CRC"
"""Read all the files and check the CRC."""
for zinfo in self.filelist:
try:
self.read(zinfo.filename) # Check CRC-32
@ -210,11 +216,11 @@ class ZipFile:
return zinfo.filename
def getinfo(self, name):
'Return the instance of ZipInfo given "name"'
"""Return the instance of ZipInfo given 'name'."""
return self.NameToInfo[name]
def read(self, name):
"Return file bytes (as a string) for name"
"""Return file bytes (as a string) for name."""
if self.mode not in ("r", "a"):
raise RuntimeError, 'read() requires mode "r" or "a"'
if not self.fp:
@ -248,7 +254,7 @@ class ZipFile:
return bytes
def _writecheck(self, zinfo):
'Check for errors before writing a file to the archive'
"""Check for errors before writing a file to the archive."""
if self.NameToInfo.has_key(zinfo.filename):
if self.debug: # Warning for duplicate names
print "Duplicate name:", zinfo.filename
@ -265,7 +271,8 @@ class ZipFile:
"That compression method is not supported"
def write(self, filename, arcname=None, compress_type=None):
'Put the bytes from filename into the archive under the name arcname.'
"""Put the bytes from filename into the archive under the name
arcname."""
st = os.stat(filename)
mtime = time.localtime(st[8])
date_time = mtime[0:6]
@ -320,7 +327,8 @@ class ZipFile:
self.NameToInfo[zinfo.filename] = zinfo
def writestr(self, zinfo, bytes):
'Write a file into the archive. The contents is the string "bytes"'
"""Write a file into the archive. The contents is the string
'bytes'."""
self._writecheck(zinfo)
zinfo.file_size = len(bytes) # Uncompressed size
zinfo.CRC = binascii.crc32(bytes) # CRC-32 checksum
@ -343,13 +351,14 @@ class ZipFile:
self.NameToInfo[zinfo.filename] = zinfo
def __del__(self):
'Call the "close()" method in case the user forgot'
"""Call the "close()" method in case the user forgot."""
if self.fp:
self.fp.close()
self.fp = None
def close(self):
'Close the file, and for mode "w" and "a" write the ending records'
"""Close the file, and for mode "w" and "a" write the ending
records."""
if self.mode in ("w", "a"): # write ending records
count = 0
pos1 = self.fp.tell()
@ -380,16 +389,20 @@ class ZipFile:
class PyZipFile(ZipFile):
"Class to create ZIP archives with Python library files and packages"
"""Class to create ZIP archives with Python library files and packages."""
def writepy(self, pathname, basename = ""):
"""Add all files from "pathname" to the ZIP archive.
If pathname is a package directory, search the directory and all
package subdirectories recursively for all *.py and enter the modules into
the archive. If pathname is a plain directory, listdir *.py and enter all
modules. Else, pathname must be a Python *.py file and the module will be
put into the archive. Added modules are always module.pyo or module.pyc.
This method will compile the module.py into module.pyc if necessary."""
If pathname is a package directory, search the directory and
all package subdirectories recursively for all *.py and enter
the modules into the archive. If pathname is a plain
directory, listdir *.py and enter all modules. Else, pathname
must be a Python *.py file and the module will be put into the
archive. Added modules are always module.pyo or module.pyc.
This method will compile the module.py into module.pyc if
necessary.
"""
dir, name = os.path.split(pathname)
if os.path.isdir(pathname):
initname = os.path.join(pathname, "__init__.py")
@ -446,9 +459,10 @@ This method will compile the module.py into module.pyc if necessary."""
def _get_codename(self, pathname, basename):
"""Return (filename, archivename) for the path.
Given a module name path, return the correct file path and archive name,
compiling if necessary. For example, given /python/lib/string,
return (/python/lib/string.pyc, string)"""
Given a module name path, return the correct file path and
archive name, compiling if necessary. For example, given
/python/lib/string, return (/python/lib/string.pyc, string).
"""
file_py = pathname + ".py"
file_pyc = pathname + ".pyc"
file_pyo = pathname + ".pyo"
@ -456,7 +470,8 @@ return (/python/lib/string.pyc, string)"""
os.stat(file_pyo)[8] >= os.stat(file_py)[8]:
fname = file_pyo # Use .pyo file
elif not os.path.isfile(file_pyc) or \
os.stat(file_pyc)[8] < os.stat(file_py)[8]:
os.stat(file_pyc)[8] < os.stat(file_py)[8]:
import py_compile
if self.debug:
print "Compiling", file_py
py_compile.compile(file_py, file_pyc)
@ -467,4 +482,3 @@ return (/python/lib/string.pyc, string)"""
if basename:
archivename = "%s/%s" % (basename, archivename)
return (fname, archivename)