<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _ascii_find_urls(bytes, mimetype, extra_tokens=True):
 """ This function finds URLs inside of ASCII bytes. """


    tokens = _tokenize(bytes, mimetype, extra_tokens=extra_tokens)

    return tokens