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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 get_type_string(item):
 """Return type string of an object."""

    if isinstance(item, DataFrame):
        return "DataFrame"
    if isinstance(item, Index):
        return type(item).__name__
    if isinstance(item, Series):
        return "Series"
    found = re.findall(r"<(?:type|class) '(\S*)'>",
                       to_text_string(type(item)))
    if found:
        return found[0]