<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _add_current_codedir(self, path):
 """Adds the directory of the file at the specified path as a base path to find other files in. """

        dirpath = self.tramp.dirname(path)
        if dirpath not in self.basepaths:
            self.basepaths.append(dirpath)
            self.rescan()