824 def filechunkiter(f, size = 65536):

   824 def filechunkiter(f, size=65536, limit=None):

   825     """Create a generator that produces all the data in the file size

   825     """Create a generator that produces the data in the file size

   826     (default 65536) bytes at a time.  Chunks may be less than size

   826     (default 65536) bytes at a time, up to optional limit (default is

   827     bytes if the chunk is the last chunk in the file, or the file is a

   827     to read all data).  Chunks may be less than size bytes if the

   828     socket or some other type of file that sometimes reads less data

   828     chunk is the last chunk in the file, or the file is a socket or

   829     than is requested."""

   829     some other type of file that sometimes reads less data than is

   830     s = f.read(size)

   830     requested."""

   831     while len(s) > 0:

   831     assert size >= 0

   832     assert limit is None or limit >= 0

   833     while True:

   834         if limit is None: nbytes = size

   835         else: nbytes = min(limit, size)

   836         s = nbytes and f.read(nbytes)

   837         if not s: break

   838         if limit: limit -= len(s)