Python Using Zip64 Extensions When Compressing Large Files

I have a script that compresses the output files. The problem is that one of the files is over 4Gigs. How would I convert my script to use ZIP64 extensions instead of the standard zip?

Here is how I am currently zipping:

try:
    import zlib
    compression = zipfile.ZIP_DEFLATED
except:
    compression = zipfile.ZIP_STORED

modes = { zipfile.ZIP_DEFLATED: 'deflated',
          zipfile.ZIP_STORED:   'stored',
          } 

compressed_name = 'edw_files_' + datetime.strftime(date(), '%Y%m%d') + '.zip' 
print 'creating archive'
zf = zipfile.ZipFile('edw_files_' + datetime.strftime(date(), '%Y%m%d') + '.zip', mode='w')
try:
    zf.write(name1, compress_type=compression)
    zf.write(name2, compress_type=compression)
    zf.write(name3, compress_type=compression)
finally:
    print 'closing'
    zf.close()