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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 _muaprocessnew(self):
 """Moves all 'new' files into cur, correctly flagging"""

        foldername = self._foldername("new")
        files = self.filesystem.listdir(foldername)
        for filename in files:
            if filename == "":
                continue
            curfilename = self._foldername(joinpath("new", filename))
            newfilename = joinpath(
                self._cur,
                "%s:2,%s" % (filename, "")
                )
            self.filesystem.rename(curfilename, newfilename)