Python: Find the location of Python module sources

Last update on May 28 2022 13:00:44 (UTC/GMT +8 hours)

Python Basic: Exercise-146 with Solution

Write a Python program to find the location of Python module sources.

Sample Solution:

Location of Python module sources:

Python Code:

import imp
print("Location of Python os module sources:")
print(imp.find_module('os'))
print("\nLocation of Python sys module sources:")
print(imp.find_module('datetime'))

Sample Output:

Location of Python os module sources:
(<_io.TextIOWrapper name='/usr/lib/python3.6/os.py' mode='r' encoding='utf-8'>, '/usr/lib/python3.6/os.py', ('.py', 'r', 1))

Location of Python sys module sources:
(<_io.TextIOWrapper name='/usr/lib/python3.6/datetime.py' mode='r' encoding='utf-8'>, '/usr/lib/python3.6/datetime.py', ('.py', 'r', 1))

List of directories of specific module:

Python Code:

import os
print("\nList of directories in os module:")
print(os.path)
print("\nList of directories in sys module:")
import sys
print(sys.path)

Sample Output:

List of directories in os module:
<module 'posixpath' from '/usr/lib/python3.6/posixpath.py'>

List of directories in sys module:
['/tmp/sessions/9ab477032ea1081a', '/trinket/python3', '/usr/lib/python36.zip', '/usr/lib/python3.6', '/usr/lib/python3.6/lib-dynload', '/usr/local/lib/python3.6/dist-packages', '/usr/lib/python3/dist-packages']

Python Code Editor:

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

The os and os.path modules.
The __file__ constant
os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
os.path.dirname(path) (returns "the directory name of pathname path")
os.getcwd() (returns "a string representing the current working directory")
os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m