PYTHON : What's the bad magic number error?

PYTHON : What's the bad magic number error?
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As promised, I have a secret feature that I want to reveal to you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
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Your YouTube progress indicator will turn into a shimmering rainbow.

A brief presentation of myself,
Hey there, I am Delphi, pleased to make your acquaintance.
I am here to assist you in getting the answers you need.
PYTHON : What's the bad magic number error?
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: PYTHON error? What's number the bad magic