CODEWITHSUNDEEP
pythonclass
PrimuS
PrimuS

Reputation: 2683

Access variable from Class in main

I'm trying to learn Python and I'm stuck with shared variables between classes.

I have a class that sets a variable like this:

class CheckStuff(threading.Thread):

  def __init__(self, debug):
    threading.Thread.__init__(self)
    self.debug = debug
    self.newGames = False

  def get_new_games(self):
    return self.newGames

  def set_new_games(self, new_games):
    self.newGames = new_games

  def run(self):
    # DO STUFF #
    # ... #
    self.set_new_games(True)
    return

I would like to access new_games from my main, I tried like this:

if __name__ == "__main__":

    debug = True
    t1 = cs.CheckStuff(debug)
    t1.start()
    t1.join()

    print(cs.CheckStuff(debug).get_new_games())
    exit()

But this returns always False. Where am I wrong? Any hints appreciated

Upvotes: 0

Views: 103

Answers (2)

Hossein
Hossein

Reputation: 2111

In the following line

 print(cs.CheckStuff(debug).get_new_games())

you make a new instance of CheckStuff class, and in the constructor you set self.newGames = False. Then, by calling get_new_game() method you ask the object to return its newGame attribute, which is obviously False.

Upvotes: 2

Daniel Roseman
Daniel Roseman

Reputation: 599788

You're creating a new instance of CheckStuff, which hasn't done anything so its newGames attribute is False. The instance that did run is t1, you should use that:

print(t1.get_new_games())

(Note, there doesn't really seem to be a good reason to use threads here, but never mind.)

Upvotes: 4

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