import os 

def get_code_from_input(input_data):
    """
    Checks if the input is a file path or Python code. 
    If it's a file path, reads the content of the file. 
    Otherwise, assumes it's Python code and returns it directly.

    Args:
        input_data (str): Either a file path or Python code.

    Returns:
        str: The Python code from the file or the input directly.
    """
    if os.path.isfile(input_data):
        try:
            with open(input_data, 'r') as file:
                code = file.read()
                return code
        except Exception as e:
            raise Exception(f"Error reading file: {e}")
    else:
        return input_data