Holy shit! The error stopped. Thanks soo much. In fact, the error is, I was supposed to give absolute path for im.save() but your answer ("/tmp/artsciimg.png")

Holy shit! The error stopped. Thanks soo much. In fact, the error is, I was supposed to give absolute path for im.save() but your answer ("/tmp/artsciimg.png") showed me the way, Thank you :)