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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 new_random_wallet(cls, user_entropy=None, network=BitcoinMainNet):
 """ Generate a new wallet using a randomly generated 512 bit seed. Args: user_entropy: Optional user-supplied entropy which is combined combined with the random seed, to help counteract compromised PRNGs. You are encouraged to add an optional `user_entropy` string to protect against a compromised CSPRNG. This will be combined with the output from the CSPRNG. Note that if you do supply this value it only adds additional entropy and will not be sufficient to recover the random wallet. If you're even saving `user_entropy` at all, you're doing it wrong. """

        seed = str(urandom(64))  # 512/8
        # weak extra protection inspired by pybitcointools implementation:
        seed += str(int(time.time()*10**6))
        if user_entropy:
            user_entropy = str(user_entropy)  # allow for int/long
            seed += user_entropy
        return cls.from_master_secret(seed, network=network)