Ahmed Mohamed Go through this lesson again this might clear your doubts https://www.sololearn.com/learn/JUMP_LINK__&&__Python__&&__JUMP_LINK/2470/?ref=app
Can you please be more descriptive with the question? Follow this guide to posting a question, so you can gain better responses 👍 https://www.sololearn.com/Discuss/333866/?ref=app
Maybe you are struggling with __init__? __init__ uses 2* _ on both sides, not just _init_ .