<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def json_decode_file(filename):
 """ Parses a textfile using json to build a python object representation """

    seq = open(filename).read()
    # The JSON standard has no comments syntax. We have to remove them
    # before feeding python's JSON parser
    seq = json_remove_comments(seq)
    # Parse all the unicode stuff to utf-8
    return json_unicode_to_utf8(json.loads(seq))