["python","first-class-functions"]
Assigning a function to a variable

Let's say I have a function def x(): print(20) Now I want to assign the function to a variable called y, so that if I use the y it calls the function x again. if i simply do the assignment y = x(), it returns None.
You simply don't call the function. >>> def x(): >>> print(20) >>> y = x >>> y() 20 The brackets tell Python that you are calling the function, so when you put them there, it calls the function and assigns y the value returned by x (which in this case is None).