How to Dynamically Get Current and Parent Directories in Python

When working with several Python projects, hard‑coding file paths can lead to errors and constant directory changes. The following examples show how to programmatically obtain the current directory, its immediate parent, and even the grand‑parent directory using the built‑in os module.

import os

print('***获取当前目录***')
print(os.getcwd())  # Current working directory
print(os.path.abspath(os.path.dirname(__file__)))  # Directory of the script

print('***获取上级目录***')
print(os.path.abspath(os.path.dirname(os.path.dirname(__file__))))  # Parent of script directory
print(os.path.abspath(os.path.dirname(os.getcwd())))  # Parent of CWD
print(os.path.abspath(os.path.join(os.getcwd(), "..")))  # Another way to get parent

print('***获取上上级目录***')
print(os.path.abspath(os.path.join(os.getcwd(), "../..")))  # Grand‑parent directory

These snippets cover three common scenarios:

Current directory: os.getcwd() returns the directory from which the script is executed, while os.path.abspath(os.path.dirname(__file__)) gives the directory containing the script file itself.

Parent directory: Combining os.path.dirname calls or using os.path.join(..., "..") yields the immediate parent directory.

Grand‑parent directory: Adding another ".." segment to the path (e.g., os.path.join(os.getcwd(), "../..")) retrieves the directory two levels up.

By integrating these methods, developers can write path‑independent code, ensuring logs or other files are always written to the correct location without manual adjustments.