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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def merge_query(path, postmap, force_unicode=True):
 """ Merges params parsed from the URI into the mapping from the POST body and returns a new dict with the values. This is a convenience function that gives use a dict a bit like PHP's $_REQUEST array. The original 'postmap' is preserved so the caller can identify a param's source if necessary. """

    if postmap:
        p = postmap.copy()
    else:
        p = {}
    p.update(get_query(path, force_unicode=False))

    if force_unicode:
        p = _unicode(p)
    return p