You want to escape the backslashes or use a raw string, since Python is seeing the \U
and interpreting it as a Unicode escape sequence.
Escaping looks like this:
"tweet photo: 'tweeted from python test' + path: 'C:\\Users\\akhya_000\\Pictures\\My Pictures\\Bing.png"
A raw string, where Python will ignore escape sequences, looks like this:
r"tweet photo: 'tweeted from python test' + path: 'C:\Users\akhya_000\Pictures\My Pictures\Bing.png"