Threading and Queuing with Functions
The problem is that you are not calling the function when you use it as an argument for ThreadedClient1:
class ThreadedClient1(threading.Thread): # ... def run(self): time.sleep(1) self.queue.put(lambda: self.fcn)It is just a function that returns a reference to the lambda you pass as an argument, NOT the result of the call to slxl.runImportAndCoordAdder(). It should be:
class ThreadedClient1(threading.Thread): # ... def run(self): time.sleep(1) self.queue.put(self.fcn())Or another solution with the reference directly (without lambdas):
def spawnthread(self): self.updatebttn.config(state="disabled") self.thread = ThreadedClient1(self.queue, slxl.runImportAndCoordAdder) self.thread.start() self.periodiccall()class ThreadedClient1(threading.Thread): # ... def run(self): time.sleep(1) self.queue.put(self.fcn())