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zipfile module


I'm having a problem using the zipfile module in Windows 2000 sp4. When I
use it to zip a small file it works fine, but large file doesnt. Here's the
error msg i get...
dynamite4_db_ar chive.py", line 45, in ?
file.write(name , os.path.basenam e(name), zipfile.ZIP_DEF LATED)
File "C:\Python22\li b\zipfile.py", line 426, in write
zinfo.file_size ))
OverflowError: long int too large to convert to int
I've read a couple of problems with this module with long int, and it says
it's a know problem in Python earlier than 2.3
So I upgraded to 2.3 and i'm still getting the error msg. I'm not proficient
at python so I'm not sure what to do at this point. The file I'm currently
trying to zip is about 2.5GB.

Here's my code that's causing the error...
currentDirFiles = os.listdir(mydi r) #list log file in dir
os.mkdir(todays _dir)

for item in currentDirFiles : #find the file with the date from 7 days ago

file_to_zip = mydir + item
destination = todays_dir + str('/') + item + str('_') + todays_date +

print "\n" + file_to_zip + "\n" + destination

file = zipfile.ZipFile (destination, "w")

for name in glob.glob(file_ to_zip):
file.write(name , os.path.basenam e(name), zipfile.ZIP_DEF LATED)


Any help would be appreciated. TIA

Jul 18 '05 #1
1 2913

lco> dynamite4_db_ar chive.py", line 45, in ?
lco> file.write(name , os.path.basenam e(name), zipfile.ZIP_DEF LATED)
lco> File "C:\Python22\li b\zipfile.py", line 426, in write
lco> zinfo.file_size ))
lco> OverflowError: long int too large to convert to int


lco> for name in glob.glob(file_ to_zip):
lco> file.write(name , os.path.basenam e(name), zipfile.ZIP_DEF LATED)

How about you write the file in chunks? I'm not familiar with the zipfile
module, but it looks like writestr will do the job for you. My guess is
something like

file = zipfile.ZipFile (destination, "w", zipfile.ZIP_DEF LATE)
for name in glob.glob(file_ to_zip):
f = open(name)
data = f.read(8192)
while data:
file.writestr(o s.path.basename (name), data)
data = f.read(8192)

might do the trick. (The zipfile module's interface to writing data looks a
bit odd to me.)


Jul 18 '05 #2

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