2021-05-07-aws-sam-pathlib-exist-ok

Using python3.8 with AWS SAM to create a lambda from a script that runs without error before applying changes for SAM. Using pathlib to check if a path exists before creating a directory like this:

Path(os.path.join(sys.path[0], 
     "../../ToolDirectory/{}".format(TOOL_DIR_NAME))).mkdir(parents=True, exist_ok=True)

Returns this error:

TypeError: mkdir() got an unexpected keyword argument 'exist_ok'

exist_ok is a valid parameter for pathlib with python3.8

After an hour of research and fiddling, the python2.7 solution to import pathlib2 instead of just pathlib makes exist_ok work as expected with AWS. I think this may be because my instance was Amazon Linux2.

Whew!