How do you create a module in Python?

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Answer:

A module in Python is a file containing definitions and statements that you can use in other Python programs. You can create a module by defining functions, classes, variables, and other constructs in a plain text file with a .py extension.

Here's an example of a simple module that defines a function and a variable:

# example_module.py

def hello(name):
    print("Hello, {}!".format(name))

greeting = "Welcome to my module!"

In this example, the module example_module.py defines a function hello and a variable greeting. You can use these definitions in other Python programs by importing the module using the import statement:

import example_module

example_module.hello("John")
print(example_module.greeting)

# Output:
# Hello, John!
# Welcome to my module!

In this example, the import statement imports the example_module module into the current program, allowing you to access the definitions in the module. You can then call the hello function and access the greeting variable using the dot notation, prefixing the name of the module and the name of the definition.

Creating a module allows you to reuse code and definitions across multiple programs, and makes it easier to organize and maintain your code. You can also distribute your modules to other users, allowing them to use your code in their own programs.

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