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 ...

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

The biggest reason to use a list is to able to find objects by their position in the list. To do this, you use Python’s index notation: a number in brackets, starting at 0, that indicates the ...

Any mutable Python object doesn’t have a consistent hash value over its lifetime, and so can’t be used as a key. For instance, a list can’t be a key, because elements can be added to or ...