How do I call a function in Python?

To call a function in Python, you need to follow these steps:

1. Define the function: You first need to define the function that you want to call. This can be done using the def keyword, followed by the function name and any parameters it accepts, and then a colon. For example, let's say we want to define a function that prints a message:

def print_message(message):
    print(message)

2. Call the function: Once the function is defined, you can call it by using its name followed by any arguments it requires in parentheses. For example, if you want to call the print_message function defined above, you could do the following:

print_message("Hello, world!")

This would output Hello, world! to the console.

So, in summary, to call a function in Python, you just need to write the function name followed by parentheses containing any arguments (if any) that the function expects.