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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 model_code_key_prefix(code_location_key_prefix, model_name, image):
 """Returns the s3 key prefix for uploading code during model deployment The location returned is a potential concatenation of 2 parts 1. code_location_key_prefix if it exists 2. model_name or a name derived from the image Args: code_location_key_prefix (str):
 the s3 key prefix from code_location model_name (str):
 the name of the model image (str):
 the image from which a default name can be extracted Returns: str: the key prefix to be used in uploading code """

    training_job_name = sagemaker.utils.name_from_image(image)
    return '/'.join(filter(None, [code_location_key_prefix, model_name or training_job_name]))