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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 bitcoin_address(self) -> str: """Generate a random bitcoin address. :return: Bitcoin address. :Example: 3EktnHQD7RiAE6uzMj2ZifT9YgRrkSgzQX """

        type_ = self.random.choice(['1', '3'])
        letters = string.ascii_letters + string.digits
        return type_ + ''.join(
            self.random.choice(letters) for _ in range(33))