[Tkinter] Lambda seems to call expression 1 extra time every time it's called.

[Yoriz]

The self.move.clicked.connect doesn't need to be in diceRoll at all, place it in the setup code not the event code, just like you have self.roll.clicked.connect
players does not need passing to the method self.move_players it can access the current player directly from self.currPl
spaces can be set as an instance variable in diceRoll, self.move_players can then access the current spaces directly from self.spaces

Remove the lambda, remove the parameters from self.move_players and connect directly to self.move_players.
It will now be connected with no out of date arguments as it gets the current values itself at the point the button is clicked.