python - What is the purpose of the return statement? How is it ...
In the Python REPL, a function's return value will be output to the screen by default (this isn't the same as printing it). This output only happens at the REPL, not when running code from a .py file. It is the same as the output from any other expression at the REPL. This is an example of print: >>> n = "foo\nbar" #just assigning a variable.
python - How do I get ("return") a result (output) from a function?
The natural, simple, direct, explicit way to get information back from a function is to return it. Broadly speaking, the purpose of a function is to compute a value, and return signifies "this is the value we computed; we are done here". Directly using return. The main trick here is that return returns a value, not a variable.
python - It is more efficient to use if-return-return or if-else-return ...
2012年2月8日 · 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.
Creating a new function as return in python function?
2012年10月5日 · Yes, you can write a function inside a function; Yes, you can return a function from a function. Just make sure to return it using return F (which returns the function object) as compared to return F(x) which calls the function and returns the value
what is the need to use return 1 or -1 in the end of a function?
2020年7月28日 · Most people return 1 or -1 for debug purposes, and let that drive the next logic. A return statement can also be used to terminate a function. so if return 1 was the first line in the function from your example. The compiler will not look at the if statement.
In Python, if I return inside a "with" block, will the file still close?
2012年3月27日 · Yes, it acts like the finally block after a try block, i.e. it always executes (unless the python process terminates in an unusual way of course). It is also mentioned in one of the examples of PEP-343 which is the specification for the with statement:
How to return value from async method in python?
2017年3月16日 · On second thought: what you probably want to do is loop.create_task(conn.close()) and still use return values. This will schedule the closing of the connection without waiting for it in your function. –
python - Matplotlib returning a plot object - Stack Overflow
From the matplotlib docs, the recommended signature to use is:. def my_plotter(ax, data1, data2, param_dict): """ A helper function to make a graph Parameters ----- ax : Axes The axes to draw to data1 : array The x data data2 : array The y data param_dict : dict Dictionary of keyword arguments to pass to ax.plot Returns ----- out : list list of artists added """ out = ax.plot(data1, …
python - How to stop a function - Stack Overflow
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 further action. That means you could have a number of places throughout your function where it might return. Like this:
Python return list from function - Stack Overflow
Python return list from function. Ask Question Asked 12 years, 11 months ago. Modified 5 years, 6 months ago.