Working with operating system paths in Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the os.path module in Python?

The os.path module helps you work with file and folder paths in a way that works on any operating system, like Windows or Mac. It makes handling paths easy and safe.

beginner

How do you join folder names and file names into a full path safely?

Use os.path.join(). It adds the right slashes or separators for your system automatically, so you don't have to worry about it.

beginner

What does os.path.exists(path) do?

It checks if the file or folder at path actually exists on your computer. It returns True if it does, and False if it doesn't.

beginner

How can you get the folder part of a full file path?

Use os.path.dirname(path). It gives you just the folder path, without the file name.

beginner

What does os.path.basename(path) return?

It returns the last part of the path, usually the file name with its extension.

Which function joins parts of a path correctly across different operating systems?

A os.path.join()

B os.path.split()

C os.path.exists()

D os.path.basename()

os.path.join() safely combines folder and file names into a full path.

What does os.path.exists(path) return if the path does not exist?

A Raises an error

B True

C None

D False

It returns False when the path is not found.

Which function gives you the folder part of a path?

A os.path.basename()

B os.path.dirname()

C os.path.join()

D os.path.exists()

os.path.dirname() returns the directory/folder part of a path.

If you want just the file name from a full path, which function do you use?

A os.path.basename()

B os.path.dirname()

C os.path.join()

D os.path.exists()

os.path.basename() returns the file name from a path.

What is the main benefit of using os.path functions instead of string operations on paths?

A They work only on Windows

B They are slower but prettier

C They automatically handle different operating system path styles

D They only work with URLs

os.path functions handle path differences between Windows, Mac, and Linux automatically.

Explain how to safely create a full file path from folder and file names in Python.

Think about how to avoid manual string concatenation for paths.

Describe how to check if a file or folder exists at a given path.

It's a simple yes/no question about the path.