Tkinter label text is a funtion object instead of text

Question

I've been googling around for over an hour at this point, but I can't figure this out. I want to display the result of the function as the label's text. The problem is that even though the return of the function is for example: 250.2, when I place the label into the tkinter window, it looks more like (numbers)< lambda >, which I think is a function object.

The label:

self.temperature = ttk.Label(
            self,
            text=lambda:self.displayInfo(0))

The function:

def displayInfo(self, index):
        self.infoList = WeatherInfo.jsonToString(self)
        
        return self.infoList[index]

Thanks in advance.