How do I call an external command within Python as if I had typed it in a shell or command prompt?

I need to set some environment variables in the Python script and I want all the other scripts that are called from Python to see the environment variables' set. If I do, os.environ["DEBUSSY&q...

Oct 25, 2017 · I usually use os.getcwd() first, and that shows me the format of the accepted input for os.chdir().

Python 3.4 introduced the pathlib module into the standard library, which provides an object oriented approach to handle filesystem paths. The is_dir() and exists() methods of a Path object can be used to answer the question:

Oct 10, 2012 · This answer provides a way to show how you can manipulate the filename to preserve parts that you want in the path or name of the file. Furthermore, the pathlib library is introduced in python 3.4 so sharing the answer here also provides exposure for a solid module to showcase its versatility and usage for more complicated requirements.

How do I determine: the current directory (where I was in the shell when I ran the Python script), and where the Python file I am executing is?

May 3, 2017 · I'm working on some Python code. I want to remove the new_folder including all its files at the end of program. Can someone please guide me how I can do that? I have seen different commands like os.

Because os.path functions use the local rules of the python installation running the script for path strings. Using os.path.join in all cases assures that your paths will be formed correctly for the platform the script is being run on.

Apr 28, 2011 · The first parameter is the directory pathname. This will change for each subdirectory. This answer is based on the 3.1.1 version documentation of the Python Library. There is a good model example of this in action on page 228 of the Python 3.1.1 Library Reference (Chapter 10 - File and Directory Access). Good Luck!

os is a standard Python module, there's no need install it. So import os should always work inside Python, and if it doesn't, the cause is your PYTHONPATH or IDE settings, look at them; don't start trying to manually install things with pip.