How to improve writing code in python?

[Banh]

Hi,
I have a problem with learning Python. My code is really bad and I can't solve 
many problems. I really want to improve it. Do you know any website which helps 
me to learn python effectively (for beginners)? This is my first programming 
language and I am studying about manipulating the images using Python. If you 
also know any websites relating to manipulate the images, can you guys tell me? 
Thank you!
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