我正在尝试从他们的快照中提取Chromium.app的新版本，我可以很好地下载文件，但是当提取它时，ZipFile要么将chrome-mac文件夹作为文件提取出来，说目录不要存在，等等。我是python的新手，所以这些错误对我来说没什么意义。这是我到目前为止所拥有的。
import urllib2
response = urllib2.urlopen('http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/LATEST')
latestRev = response.read()
print latestRev
# we have the revision, now we need to download the zip and extract it
latestZip = urllib2.urlopen('http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/%i/chrome-mac.zip' % (int(latestRev)), '~/Desktop/ChromiumUpdate/%i-update' % (int(latestRev)))
#declare some vars that hold paths n shit
workingDir = '/Users/slehan/Desktop/ChromiumUpdate/'
chromiumZipPath = '%s%i-update.zip' % (workingDir, (int(latestRev)))
chromiumAppPath = 'chrome-mac/' #the path of the chromium executable within the zip file
chromiumAppExtracted = '%s/Chromium.app' % (workingDir) # path of the extracted executable
output = open(chromiumZipPath, 'w') #delete any current file there
output.write(latestZip.read())
output.close()
# we have the .zip now we need to extract the Chromium.app file, it's in ziproot/chrome-mac/Chromium.app
import zipfile, os
zippedFile = open(chromiumZipPath)
zippedChromium = zipfile.ZipFile(zippedFile, 'r')
zippedChromium.extract(chromiumAppPath, workingDir)
#print zippedChromium.namelist()
zippedChromium.close()
#zippedChromium.close()
有任何想法吗？
看来你遇到了bug in Python。这个other question详述了问题和解决方法。您可以选择使用其中一种解决方法，或者更新到Python 2.6.5或2.7b2。
其中一个解决方法建议从修复的Python中复制patched zipfile.py module。
祝你好运！
这似乎对我有用：
import os
import urllib2
import zipfile
from StringIO import StringIO
response = urllib2.urlopen('http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/LATEST')
latestRev = response.read()
print 'getting revision', latestRev
# we have the revision, now we need to download the zip and extract it
locRef='http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/%i/chrome-mac.zip' % (int(latestRev))
latestZip = StringIO(urllib2.urlopen(locRef).read())
# we have the .zip now we need to extract the Chromium.app file, it's in chrome-mac/Chromium.app/
zippedChromium = zipfile.ZipFile(latestZip)
# find all zip members in chrome-mac/Chromium.app
members = [m for m in zippedChromium.namelist() if m.startswith('chrome-mac/Chromium.app/')]
#zippedChromium.extract(chromiumAppPath, workingDir)
target = 'chromium-%s' % latestRev
if os.path.isdir(target):
print 'destination already exists, exiting'
raise SystemExit(1)
os.makedirs(target)
zippedChromium.extractall(target, members)
#zippedChromium.close()
这是另一个切割 - 这是相同的技术，但它走的结果证明它的工作原理。
import os
import urllib2
import zipfile
from StringIO import StringIO
response = urllib2.urlopen('http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/LATEST')
latestRev = response.read()
print 'getting revision', latestRev
# we have the revision, now we need to download the zip and extract it
locRef='http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/%i/chrome-mac.zip' % (int(latestRev))
latestZip = StringIO(urllib2.urlopen(locRef).read())
# we have the .zip now we need to extract the Chromium.app file, it's in chrome-mac/Chromium.app/
zippedChromium = zipfile.ZipFile(latestZip)
# find all zip members in chrome-mac/Chromium.app
members = [m for m in zippedChromium.namelist() if m.startswith('chrome-mac/Chromium.app/')]
#zippedChromium.extract(chromiumAppPath, workingDir)
target = 'chromium-%s' % latestRev
if os.path.isdir(target):
print 'destination already exists, exiting'
raise SystemExit(1)
os.makedirs(target)
zippedChromium.extractall(target, members)
lengths = [
(len(dirnames), len(filenames))
for dirpath, dirnames, filenames in os.walk(target)
]
dirlengths, filelengths = zip(*lengths)
ndirs = sum(dirlengths)
nfiles = sum(filelengths)
print 'extracted %(nfiles)d files in %(ndirs)d dirs' % vars()
#zippedChromium.close()
我运行时获得的输出是
> .\getapp.py
getting revision 48479
extracted 537 files in 184 dirs
在Python中从zip中提取.app是另一个问题（通常使用zip实用程序不会发生这种情况）。似乎没有人提到过这个......
由于丢失了嵌套二进制文件上的执行权限位，.app可以通过这种方式停止提取功能。你可以解决这个问题，只需再次授予它。
这是我正在使用的松散代码片段。根据需要对其进行修改（或者编写更通用的函数以更普遍的方式处理这种情况）：
import os, zipfile
...
ZIP_PATH = APP_PATH + ".zip"
APP_BIN_DIR = os.path.join( APP_PATH, "Contents/MacOS" )
zipfile.ZipFile( ZIP_PATH, 'r' ).extractall( WORK_DIR )
BIN_PATH = os.path.join( APP_BIN_DIR, os.listdir( APP_BIN_DIR )[0] )
os.chmod( BIN_PATH, 0o777 )
我的程序已经知道在哪里可以找到APP_PATH（即在WORK_DIR内）。我不得不把它拉上来，并在事后用鞋拔出细节。我把我的拉链命名为XXXXX.app.zip。我在这里很简单地解决了BIN_PATH，而不需要知道.app中二进制文件的名称，因为我知道在我的用例中只有一个文件。我授予它完整（777）权限，因为我只是删除了脚本末尾的.app。