What does the return statement do? How should it be used in Python? How does return differ from print? See also Often, people try to use print in a loop inside a function in order to see multiple ...

We can make a tuple right on the return line; or we can use a dictionary, a namedtuple (Python 2.6+), a types.simpleNamespace (Python 3.3+), a dataclass (Python 3.7+), or some other class (perhaps even one we write ourselves) to associate names with the values that are being returned; or we can accumulate values from a loop in a list; etc. etc.

Apr 6, 2014 · The return ends the function's control straightaway and returns a value without having to go through the rest of the function's code. The first method however is slightly slower since it creates the variable num and then proceeds through more of the code until the final return value where num is referenced again and returned.

Mar 27, 2012 · Consider the following: with open (path, mode) as f: return [line for line in f if condition] Will the file be closed properly, or does using return somehow bypass the context manager?

Feb 8, 2012 · Since the return statement terminates the execution of the current function, the two forms are equivalent (although the second one is arguably more readable than the first). The efficiency of both forms is comparable, the underlying machine code has to perform a jump if the if condition is false anyway. Note that Python supports a syntax that allows you to use only one return statement in your ...

Aug 15, 2018 · What's the difference between where I put the 'return'? It gives me a different answer and I'm really confused. When you call return, you end the function and return execution flow to the calling function. The value you place next to …

Jan 13, 2017 · Why use return at all? How about just updating the value in the display whilst you're in the while loop?

Jul 28, 2020 · Generally, a return statement is used to give a value back to the caller of the function. In your code for instance: you return 1 if the if condition checks out, and return -1 if the condition is not satisfied.

return in a function means you are leaving the function immediately and returning to the place where you call it. So you should use return when you are 100% certain that you wanna exit the function immediately.

Jul 4, 2020 · This question has become a canonical duplicate target for questions about returning multiple values from code including a for loop. As such, I have edited it somewhat artificially, to make it as useful as possible in that context.