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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 _make_random_string(length):
 """Returns a random lowercase, uppercase, alphanumerical string. :param int length: The length in bytes of the string to generate. """

    chars = string.ascii_lowercase + string.ascii_uppercase + string.digits
    return ''.join(random.choice(chars) for x in range(length))