Robert Bossy wrote: > k.i.n.g. wrote: >> I think I am not clear with my question, I am sorry. Here goes the >> exact requirement. >> >> We use dd command in Linux to create a file with of required size. In >> similar way, on windows I would like to use python to take the size of >> the file( 50MB, 1GB ) as input from user and create a uncompressed >> file of the size given by the user. >> >> ex: If user input is 50M, script should create 50Mb of blank or empty >> file >> > def make_blank_file(path, size): > f = open(path, 'w') > f.seek(size - 1) > f.write('\0') > f.close() > > I'm not sure the f.seek() trick will work on all platforms, so you can: > > def make_blank_file(path, size): > f = open(path, 'w') > f.write('\0' * size) > f.close()
I point out that a 1 GB string is probably not a good idea. def make_blank_file(path, size): chunksize = 10485760 # 10 MB chunk = '\0' * chunksize left = size fh = open(path, 'wb') while left > chunksize: fh.write(chunk) left -= chunksize if left > 0: fh.write('\0' * left) fh.close() > Cheers, > RB -- -- http://mail.python.org/mailman/listinfo/python-list