How do I change directory back to my original working directory with Python?

Question

I have a function that resembles the one below. I\'m not sure how to use the os module to get back to my original working directory at the conclusion of the jar\'s execution

Answer 1

A context-manager is overkill for this situation (executing a system command). The best solution is to use the subprocess module instead (Python 2.4 onwards) and the run or popen methods with the cwd argument.

So, your code can be replaced with:

def run(): 
    #run jar from test directory
    subprocess.run(cmd, cwd=testDir)

See https://bugs.python.org/issue25625 and https://docs.python.org/3/library/subprocess.html#subprocess-replacements.