invalid mode ('wb') or filename (Windows)

[thBoo39]

Tried:
from dirtools import Dir, DirState

d = Dir('myProject')
dir_state = DirState(d)
dir_state.to_json()

IOError: [Errno 22] invalid mode ('wb') or filename.

I'm using Windows. I believe the cause should be use of ':' in filename in .iosformat

[samuel-b8]

same problem ;

if dt is None:
            dt = datetime.utcnow()
            dt = dt.isoformat()
            dt = dt.replace(':','-')

also the json.dumps makes a str, so the with open(path, 'wb') as f: statement in to_json and from_json should be without the b option.