how can i go over different functions using for loop and .format for my code below?

Question

I am working on a basic calculator using PyQt5. I have a class to create buttons so I don't have to do it manually each time. I defined 16 functions, but I couldn't manage to attach these functions on the buttons using .format .

funclistq = ["sum", "takeaway", "multiply", "divide", "seven", "eight",
             "nine", "clear", "four", "five", "six", "zero", "one",
             "two", "three", "ok"]

for i in range(16):
  self.button.clicked.connect(self.{}.format(funclistq[i]))

Answer 1

.format() is only for strings. What you want is a dynamic attribute lookup, which you can do with getattr .

Also note that in Python, a for loop can loop directly over the items in a list, without having to use indices.

for func_name in func_list_q:
    func = getattr(self, func_name)
    self.button.clicked.connect(func)

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On a somewhat related note: if you're on Python 3.6 or newer and using .format() for strings, I bet you'll really enjoy f-strings . They make formatting much more convenient and readable!