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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 encrypt_python_item(item, crypto_config):
 # type: (dynamodb_types.ITEM, CryptoConfig) -> dynamodb_types.ITEM """Encrypt a dictionary for DynamoDB. .. note:: This handles human-friendly dictionaries and is for use with the boto3 DynamoDB service or table resource. :param dict item: Plaintext dictionary :param CryptoConfig crypto_config: Cryptographic configuration :returns: Encrypted and signed dictionary :rtype: dict """

    ddb_item = dict_to_ddb(item)
    encrypted_ddb_item = encrypt_dynamodb_item(ddb_item, crypto_config)
    return ddb_to_dict(encrypted_ddb_item)