import subprocess
import os

if __name__=="__main__":
    backup_folder_repo = 'C:/bitbucket_backup/chameleon'
    if os.path.exists(backup_folder_repo):
        print ('Folder exists: ', os.path.exists(backup_folder_repo))
        output = subprocess.call(['git', 'init', '--bare'], cwd=backup_folder_repo)
OUTPUT:
=================== RESTART: C:/Users/fabio/Qsync/teste.py ===================
Folder exists:  True
Traceback (most recent call last):
  File "C:/Users/fabio/Qsync/teste.py", line 8, in <module>
    output = subprocess.call(['git', 'init', '--bare'], cwd=backup_folder_repo)
  File "C:\Users\fabio\AppData\Local\Programs\Python\Python36-32\lib\subprocess.py", line 267, in call
    with Popen(*popenargs, **kwargs) as p:
  File "C:\Users\fabio\AppData\Local\Programs\Python\Python36-32\lib\subprocess.py", line 707, in __init__
    restore_signals, start_new_session)
  File "C:\Users\fabio\AppData\Local\Programs\Python\Python36-32\lib\subprocess.py", line 990, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] O sistema não conseguiu localizar o ficheiro especificado