RE: Copying a ZipExtFile

[Moore, Mathew L]

 On October 28, 2009 8:33 PM, ryles wrote:

snip
  with io.BytesIO() as memio:
  shutil.copyfileobj(f, memio)
  zip = zipfile.ZipFile(file=memio)
  # Can't use zip.extract(), because I want to ignore paths
  # within archive.
  src = zip.open('unknowndir/src.txt')
  with open('dst.txt', mode='wb') as dst:
  shutil.copyfileobj(src, dst)
 
  The last line throws an Error:
 
  Traceback (most recent call last):
File test.py, line 25, in module
  shutil.copyfileobj(src, dst)
File C:\Python26\lib\shutil.py, line 27, in copyfileobj
  buf = fsrc.read(length)
File C:\Python26\lib\zipfile.py, line 594, in read
  bytes = self.fileobj.read(bytesToRead)
  TypeError: integer argument expected, got 'long'
 
 It should hopefully work if you use cStringIO/StringIO instead of
 BytesIO.


It does! Excellent!  You've saved me the trouble of a weekend debug session.

--Matt

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RE: Copying a ZipExtFile

[Moore, Mathew L]

 En Fri, 23 Oct 2009 14:15:33 -0300, Moore, Mathew L
 moor...@battelle.org
 escribió:
 
  with io.BytesIO() as memio:
  shutil.copyfileobj(f, memio)
  zip = zipfile.ZipFile(file=memio)
  # Can't use zip.extract(), because I want to ignore paths
  # within archive.
  src = zip.open('unknowndir/src.txt')
  with open('dst.txt', mode='wb') as dst:
  shutil.copyfileobj(src, dst)
 
 
  The last line throws an Error:
 
 
  Traceback (most recent call last):
File test.py, line 25, in module
  shutil.copyfileobj(src, dst)
File C:\Python26\lib\shutil.py, line 27, in copyfileobj
  buf = fsrc.read(length)
File C:\Python26\lib\zipfile.py, line 594, in read
  bytes = self.fileobj.read(bytesToRead)
  TypeError: integer argument expected, got 'long'
 
 Try adding a length parameter to the copyfileobj call, so the copy is
 done in small enough chunks.
 


Hmmm...tried a variety of lengths (512, 1024, etc.) with no luck.  Maybe this 
is a good opportunity for me to learn some Python debugging tools.

Thanks!
--Matt

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Copying a ZipExtFile

[Moore, Mathew L]

Hello all,

A newbie here.  I was wondering why the following fails on Python 2.6.2 
(r262:71605) on win32.  Am I doing something inappropriate?

Interestingly, it works in 3.1, but would like to also get it working in 2.6.

Thanks in advance,
--Matt


import io
import shutil
import tempfile
import zipfile

with tempfile.TemporaryFile() as f:
# (Real code retrieves archive via urllib2.urlopen().)
zip = zipfile.ZipFile(f, mode='w')
zip.writestr('unknowndir/src.txt', 'Hello, world!')
zip.close();

# (Pretend we just downloaded the zip file.)
f.seek(0)

# Result of urlopen() is not seekable, but ZipFile requires a
# seekable file.  Work around this by copying the file into a
# memory stream.
with io.BytesIO() as memio:
shutil.copyfileobj(f, memio)
zip = zipfile.ZipFile(file=memio)
# Can't use zip.extract(), because I want to ignore paths
# within archive.
src = zip.open('unknowndir/src.txt')
with open('dst.txt', mode='wb') as dst:
shutil.copyfileobj(src, dst)


The last line throws an Error:


Traceback (most recent call last):
  File test.py, line 25, in module
shutil.copyfileobj(src, dst)
  File C:\Python26\lib\shutil.py, line 27, in copyfileobj
buf = fsrc.read(length)
  File C:\Python26\lib\zipfile.py, line 594, in read
bytes = self.fileobj.read(bytesToRead)
TypeError: integer argument expected, got 'long'


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