Jan 17, 2013 · 743 It's a function annotation. In more detail, Python 2.x has docstrings, which allow you to attach a metadata string to various types of object. This is amazingly handy, so …

However, to to a global variable within a function, you have to use the global keyword in front of the variable declaration within the function, or else the function will consider it a separate, local …

Apr 7, 2017 · def my_func(param1, param2): # stuff However, you don't actually give the types of those parameters. Also, if I remember, Python is a strongly typed language, as such, it seems …

See the Python documentation for an excellent summary; the various other answers to the question make use of most of these variations. Since you always have parameters a, b, c in …

Python has the syntactical requirement that code blocks (after if, except, def, class etc.) cannot be empty. Empty code blocks are however useful in a variety of different contexts, such as in …

A simple return statement will 'stop' or return the function; in precise terms, it 'returns' function execution to the point at which the function was called - the function is terminated without …

I would like to return two values from a function in two separate variables. What would you expect it to look like on the calling end? You can't write a = select_choice(); b = select_choice() …

Apr 3, 2015 · I am trying to figure out how to put a define function inside a define function inside of a class. Python code of what I want to do: class Guy (): def move (self): def left (self): ...

It is a type annotation for the main function that simply states that this function returns None. Type annotations were introduced in Python 3.5 and are specified in PEP 484. Annotations for the …

To be more general, they "do something" with the passed in method/function. That my include calling it and return its result, iterating over it and returning the resulting joined string, or, as …