使用PyQt编程过时，经常会遇到给槽函数传递自定义参数的情况。
采用 lamda：
示例1
self.but1.clicked.connect(lambda: self.mySlot(1))
self.but2.clicked.connect(lambda: self.mySlot(2))
def mySlot(self, param):
if param == 1:
...
elif param == 2:
...
示例2
def connections(self):
my_button.clicked.connect(lambda checked: self.on_button(checked, 'hi'))
def on_button(self, checked, message):
print checked, message # prints "True, hi"
采用 functools
# imports the functools module
import functools
def connections(self):
my_button.clicked.connect(functools.partial(self.on_button, 'hi'))
def on_button(self, message, checked):
print checked, message # prints "True, hi"
REF
https://www.jianshu.com/p/588a7384bbb3
https://zhuanlan.zhihu.com/p/371042469