<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def pretty_print_post(req):
 """Helper to print a "prepared" query. Useful to debug a POST query. However pay attention at the formatting used in this function because it is programmed to be pretty printed and may differ from the actual request. """

    print(('{}\n{}\n{}\n\n{}'.format(
        '-----------START-----------',
        req.method + ' ' + req.url,
        '\n'.join('{}: {}'.format(k, v) for k, v in list(req.headers.items())),
        req.body,
    )))