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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 _caller_path(index):
 # type: (int) -> str """ Get the caller's file path, by the index of the stack, does not work when the caller is stdin through a CLI python """

    module = None
    stack = inspect.stack()
    while not module:
        if index >= len(stack):
            raise RuntimeError("Cannot find import path")
        frame = stack[index]
        module = inspect.getmodule(frame[0])
        index += 1
    filename = module.__file__
    path = os.path.dirname(os.path.realpath(filename))
    return path