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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 _parameterize_obj(obj):
 """Recursively parameterize all strings contained in an object. Parameterizes all values of a Mapping, all items of a Sequence, an unicode string, or pass other objects through unmodified. Byte strings will be interpreted as UTF-8. Args: obj: data to parameterize Return: A parameterized object to be included in a CloudFormation template. Mappings are converted to `dict`, Sequences are converted to `list`, and strings possibly replaced by compositions of function calls. """


    if isinstance(obj, Mapping):
        return dict((key, _parameterize_obj(value))
                    for key, value in obj.items())
    elif isinstance(obj, bytes):
        return _parameterize_string(obj.decode('utf8'))
    elif isinstance(obj, str):
        return _parameterize_string(obj)
    elif isinstance(obj, Sequence):
        return list(_parameterize_obj(item) for item in obj)
    else:
        return obj