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

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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74
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 # Written by James C. Ahlstrom jim@interet.com
# All rights transferred to CNRI pursuant to the Python contribution agreement # All rights transferred to CNRI pursuant to the Python contribution agreement
import struct, os, time import struct, os, time
import binascii, py_compile import binascii
try: try:
import zlib # We may need its compression method 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 structFileHeader = "<4s2B4H3l2H" # 12 items, file header record, 30 bytes
stringFileHeader = "PK\003\004" # magic number for file header stringFileHeader = "PK\003\004" # magic number for file header
def is_zipfile(filename): def is_zipfile(filename):
"""Quickly see if file is a ZIP file by checking the magic number. """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: try:
fpin = open(filename, "rb") fpin = open(filename, "rb")
fpin.seek(-22, 2) # Seek to end-of-file record 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: except:
pass pass
class ZipInfo: 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)): def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
self.filename = filename # Name of the file in the archive self.filename = filename # Name of the file in the archive
self.date_time = date_time # year, month, day, hour, min, sec self.date_time = date_time # year, month, day, hour, min, sec
@ -66,7 +70,7 @@ class ZipInfo:
# file_size Size of the uncompressed file # file_size Size of the uncompressed file
def FileHeader(self): def FileHeader(self):
'Return the per-file header as a string' """Return the per-file header as a string."""
dt = self.date_time dt = self.date_time
dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2] dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
dostime = dt[3] << 11 | dt[4] << 5 | dt[5] / 2 dostime = dt[3] << 11 | dt[4] << 5 | dt[5] / 2
@ -86,9 +90,10 @@ class ZipInfo:
class ZipFile: 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): 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: if compression == ZIP_STORED:
pass pass
elif compression == ZIP_DEFLATED: elif compression == ZIP_DEFLATED:
@ -123,7 +128,7 @@ class ZipFile:
raise RuntimeError, 'Mode must be "r", "w" or "a"' raise RuntimeError, 'Mode must be "r", "w" or "a"'
def _GetContents(self): 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 = self.fp
fp.seek(-22, 2) # Start of end-of-archive record fp.seek(-22, 2) # Start of end-of-archive record
filesize = fp.tell() + 22 # Get file size filesize = fp.tell() + 22 # Get file size
@ -184,25 +189,26 @@ class ZipFile:
data.filename, fname) data.filename, fname)
def namelist(self): def namelist(self):
"Return a list of file names in the archive" """Return a list of file names in the archive."""
l = [] l = []
for data in self.filelist: for data in self.filelist:
l.append(data.filename) l.append(data.filename)
return l return l
def infolist(self): 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 return self.filelist
def printdir(self): 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") print "%-46s %19s %12s" % ("File Name", "Modified ", "Size")
for zinfo in self.filelist: for zinfo in self.filelist:
date = "%d-%02d-%02d %02d:%02d:%02d" % zinfo.date_time date = "%d-%02d-%02d %02d:%02d:%02d" % zinfo.date_time
print "%-46s %s %12d" % (zinfo.filename, date, zinfo.file_size) print "%-46s %s %12d" % (zinfo.filename, date, zinfo.file_size)
def testzip(self): def testzip(self):
"Read all the files and check the CRC" """Read all the files and check the CRC."""
for zinfo in self.filelist: for zinfo in self.filelist:
try: try:
self.read(zinfo.filename) # Check CRC-32 self.read(zinfo.filename) # Check CRC-32
@ -210,11 +216,11 @@ class ZipFile:
return zinfo.filename return zinfo.filename
def getinfo(self, name): def getinfo(self, name):
'Return the instance of ZipInfo given "name"' """Return the instance of ZipInfo given 'name'."""
return self.NameToInfo[name] return self.NameToInfo[name]
def read(self, 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"): if self.mode not in ("r", "a"):
raise RuntimeError, 'read() requires mode "r" or "a"' raise RuntimeError, 'read() requires mode "r" or "a"'
if not self.fp: if not self.fp:
@ -248,7 +254,7 @@ class ZipFile:
return bytes return bytes
def _writecheck(self, zinfo): 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.NameToInfo.has_key(zinfo.filename):
if self.debug: # Warning for duplicate names if self.debug: # Warning for duplicate names
print "Duplicate name:", zinfo.filename print "Duplicate name:", zinfo.filename
@ -265,7 +271,8 @@ class ZipFile:
"That compression method is not supported" "That compression method is not supported"
def write(self, filename, arcname=None, compress_type=None): 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) st = os.stat(filename)
mtime = time.localtime(st[8]) mtime = time.localtime(st[8])
date_time = mtime[0:6] date_time = mtime[0:6]
@ -320,7 +327,8 @@ class ZipFile:
self.NameToInfo[zinfo.filename] = zinfo self.NameToInfo[zinfo.filename] = zinfo
def writestr(self, zinfo, bytes): 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) self._writecheck(zinfo)
zinfo.file_size = len(bytes) # Uncompressed size zinfo.file_size = len(bytes) # Uncompressed size
zinfo.CRC = binascii.crc32(bytes) # CRC-32 checksum zinfo.CRC = binascii.crc32(bytes) # CRC-32 checksum
@ -343,13 +351,14 @@ class ZipFile:
self.NameToInfo[zinfo.filename] = zinfo self.NameToInfo[zinfo.filename] = zinfo
def __del__(self): def __del__(self):
'Call the "close()" method in case the user forgot' """Call the "close()" method in case the user forgot."""
if self.fp: if self.fp:
self.fp.close() self.fp.close()
self.fp = None self.fp = None
def close(self): 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 if self.mode in ("w", "a"): # write ending records
count = 0 count = 0
pos1 = self.fp.tell() pos1 = self.fp.tell()
@ -380,16 +389,20 @@ class ZipFile:
class PyZipFile(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 = ""): def writepy(self, pathname, basename = ""):
"""Add all files from "pathname" to the ZIP archive. """Add all files from "pathname" to the ZIP archive.
If pathname is a package directory, search the directory and all If pathname is a package directory, search the directory and
package subdirectories recursively for all *.py and enter the modules into all package subdirectories recursively for all *.py and enter
the archive. If pathname is a plain directory, listdir *.py and enter all the modules into the archive. If pathname is a plain
modules. Else, pathname must be a Python *.py file and the module will be directory, listdir *.py and enter all modules. Else, pathname
put into the archive. Added modules are always module.pyo or module.pyc. must be a Python *.py file and the module will be put into the
This method will compile the module.py into module.pyc if necessary.""" 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) dir, name = os.path.split(pathname)
if os.path.isdir(pathname): if os.path.isdir(pathname):
initname = os.path.join(pathname, "__init__.py") 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): def _get_codename(self, pathname, basename):
"""Return (filename, archivename) for the path. """Return (filename, archivename) for the path.
Given a module name path, return the correct file path and archive name, Given a module name path, return the correct file path and
compiling if necessary. For example, given /python/lib/string, archive name, compiling if necessary. For example, given
return (/python/lib/string.pyc, string)""" /python/lib/string, return (/python/lib/string.pyc, string).
"""
file_py = pathname + ".py" file_py = pathname + ".py"
file_pyc = pathname + ".pyc" file_pyc = pathname + ".pyc"
file_pyo = pathname + ".pyo" file_pyo = pathname + ".pyo"
@ -457,6 +471,7 @@ return (/python/lib/string.pyc, string)"""
fname = file_pyo # Use .pyo file fname = file_pyo # Use .pyo file
elif not os.path.isfile(file_pyc) or \ 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: if self.debug:
print "Compiling", file_py print "Compiling", file_py
py_compile.compile(file_py, file_pyc) py_compile.compile(file_py, file_pyc)
@ -467,4 +482,3 @@ return (/python/lib/string.pyc, string)"""
if basename: if basename:
archivename = "%s/%s" % (basename, archivename) archivename = "%s/%s" % (basename, archivename)
return (fname, archivename) return (fname, archivename)