I connect my android phone to my windows laptop. In windows explorer the directory where my photos are is:
Computer\GT-I9100\Phone\DCIM\Camera\
In python I do:
phone_dir="Computer\GT-I9100\Phone\DCIM\Camera"
os.listdir(phone_dir)
I get:
FileNotFoundError: [WinError 3] The system cannot find the path specified: 'Computer\\GT-I9100\\Phone\\DCIM\\Camera\\*.*'
Edit: The best I have got so far is to enable mass storage on the android device and then python can see it. But I'd prefer not to have to do this. So will keep question open.