Python has built-in facilities for that, there is no need to write wrapper by yourself. from functools import partial with open('mydata.db', 'rb') as f:

Python has built-in facilities for that, there is no need to write wrapper by yourself. from functools import partial with open('mydata.db', 'rb') as f: for block in iter(partial(f.read, 64), b''): process_block(block)