Working with files in Python is pretty easy. But there’s a common mistake that can sneak into your code. Not closing the file ...

Map is a common way to transform lists in most programming languages. In Python, map is a function that loops over a list and applies a function (that you provide) to each item. Your function receives ...

One of these widgets, the listbox, allows the programmer to give the user a list of items to choose from. Also, the programmer can use special commands to add and remove items from the listbox.