how to open folder in python

1import subprocess
2subprocess.Popen(r'explorer /select,"C:\path\of\folder\file"')

1path = 'C:\\Users\\Username\\Path\\To\\File'
2file=open(path, "r")

1import webbrowser
2
3path = "C:/Users/Username/PycharmProjects"
4webbrowser.open(path) # Opens 'PycharmProjects' folder.

1import subprocess
2subprocess.Popen(r'explorer /select,"C:\path\of\folder\file"')
3
4#I am going to find a way to make it so that if you code into the thing, then it will open a file you want