Top10 Python important Question and Answers | Modules

 

These are few important questions and answers cover fundamental concepts related to Python modules, helping you to understand, how to use and work with them effectively in your Python programs. 

What is a Python module? 

Answer: A Python module is a file containing Python code, including functions, classes, and variables. Modules allow you to organize your code into reusable and logically grouped components.

How do you import a module in Python?

Answer: You can import a module in Python using the import keyword. For example: import math imports the math module.

What is the difference between a module and a package in Python?

Answer: A module is a single file containing Python code, while a package is a collection of modules organized in a directory hierarchy. Packages typically contain an __init__.py file to indicate that the directory is a package.

What is the purpose of the __init__.py file in a Python package?

Answer: The __init__.py file is used to indicate that a directory should be treated as a Python package. It can also contain initialization code that runs when the package is imported.

How do you access functions or variables from an imported module?

Answer: You can access functions or variables from an imported module using dot notation. For example: math.sqrt(25) accesses the sqrt function from the math module.

What is a built-in module in Python?

Answer: Built-in modules are modules that come pre-installed with Python and are available for use without any additional installation. Examples include math, os, and sys.

How can you create your own Python module?

Answer: To create your own Python module, you need to create a .py file containing your code and place it in the same directory or in a directory that's in your Python path.

What is the purpose of the if __name__ == "__main__": construct in a Python module?

Answer: This construct allows you to check whether a Python script is being run as the main program or if it's being imported as a module. It's often used to include or exclude code that should only run when the script is the main program.

How do you install and manage third-party Python modules?

Answer: You can use package managers like pip or conda to install and manage third-party Python modules. For example, pip install module_name installs a module.

What is a namespace collision in Python modules?

Answer: A namespace collision occurs when two or more modules or variables have the same name, leading to ambiguity in the code. To avoid collisions, you can use aliases when importing modules or qualify variable names with the module name.