如何列出类中的对象

I have a class

我上课了

class movie:

 def __init__(self, title, year, release):
    self._title = title
    self._year = year
    self._release= release

 def getTitle(self):
    return self._title
 def getYear(self):
    return self._year
 def getRel(self):
    return self._release

 def setTitle(self, title):
    self._title = movie
 def setYear(self, year):
    self._year = movie
 def setRel(self, release):
    self._release = movie


 def __str__(self):
    outputString = "Title:" + str(self._title) + "Year:" + str(self._year) + "Production:" + str(self._release)
    return outputString
class movie:

 def __i