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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 get_byte_array(integer):
 """Return the variable length bytes corresponding to the given int"""

    # Operate in big endian (unlike most of Telegram API) since:
    # > "...pq is a representation of a natural number
    #    (in binary *big endian* format)..."
    # > "...current value of dh_prime equals
    #    (in *big-endian* byte order)..."
    # Reference: https://core.telegram.org/mtproto/auth_key
    return int.to_bytes(
        integer,
        (integer.bit_length() + 8 - 1) // 8,  # 8 bits per byte,
        byteorder='big',
        signed=False
    )