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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 verify(password, hash):
 """ Verify a password against a passed hash """

    _, algorithm, cost, salt, password_hash = hash.split("$")

    password = pbkdf2.pbkdf2_hex(password, salt, int(cost) * 500)

    return _safe_str_cmp(password, password_hash)