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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 maybe_center_plot(result):
 """Embeds a possible tikz image inside a center environment. Searches for matplotlib2tikz last commend line to detect tikz images. Args: result: The code execution result Returns: The input result if no tikzpicture was found, otherwise a centered version. """

    begin = re.search('(% .* matplotlib2tikz v.*)', result)
    if begin:
        result = ('\\begin{center}\n' + result[begin.end():] +
                  '\n\\end{center}')
    return result