<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_file_iterator(self, file_obj):
 """ For given `file_obj` return iterator, which will read the file in `self.read_bs` chunks. Args: file_obj (file):
 File-like object. Return: iterator: Iterator reading the file-like object in chunks. """

        file_obj.seek(0)

        return iter(lambda: file_obj.read(self.read_bs), '')