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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 assignrepr(self, prefix, style=None, utcoffset=None):
 """Return a |repr| string with an prefixed assignement. Without option arguments given, printing the returned string looks like: timegrid = Timegrid('1996-11-01 00:00:00', '1997-11-01 00:00:00', '1d') The optional arguments are passed to method |Date.to_repr| without any modifications: Timegrid('1996-11-01T01:00:00+02:00', '1997-11-01T01:00:00+02:00', '1d') """

        skip = len(prefix) + 9
        blanks = ' ' * skip
        return (f"{prefix}Timegrid('"
                f"{self.firstdate.to_string(style, utcoffset)}',\n"
                f"{blanks}'{self.lastdate.to_string(style, utcoffset)}',\n"
                f"{blanks}'{str(self.stepsize)}')")