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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 _setup_paths(self, paths, filters=()):
 """Find interpreters under paths, and cache them."""

    for interpreter in self._matching(PythonInterpreter.all(paths), filters=filters):
      identity_str = str(interpreter.identity)
      pi = self._interpreter_from_relpath(identity_str, filters=filters)
      if pi is None:
        self._setup_interpreter(interpreter, identity_str)
        pi = self._interpreter_from_relpath(identity_str, filters=filters)
      if pi:
        yield pi