When using lambda to pass parameters in a loop, the parameters are always the same value

When I use PyQt5 when , You need to pass in parameters when calling events , So I thought of lambda function , The code is as follows ：

  for i, button in enumerate(self.button_dict.values()):
       button.clicked.connect(lambda: self.click_checkbox(i))

here i It's all the same value .

lambda function （ Or closure ） What is passed is not the value of the parameter , It is the physical address of the parameter , therefore lambda The parameters passed will all be the same value . If you want to solve it, you can use functools modular .

Solution
Import functools modular , Use partial Method . The changed code is as follows ：

button.clicked.connect(partial(self.click_checkbox, i))

Reference resources ：https://blog.csdn.net/qq_34965596/article/details/100579458