How to loop until EOF in Python?

Question

I need to loop until I hit the end of a file-like object, but I\'m not finding an \"obvious way to do it\", which makes me suspect I\'m overlooking something, well, obvious.

Answer 1

Have you seen how to iterate over lines in a text file?

for line in file_obj:
  use(line)

You can do the same thing with your own generator:

def read_blocks(file_obj, size):
  while True:
    data = file_obj.read(size)
    if not data:
      break
    yield data

for block in read_blocks(file_obj, 4):
  use(block)

See also:

• file.read