[Solved] Why am I getting array instead of vector size? [closed]

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Well, I got result that was need for me. I found him in another question from Stack Overflow:
How to show graph in Visual Studio Code itself?

Use #%% for creating cells in that you will run independent fragments of code. It seems like Python Shell(this is Jupyter Notebook that I love).

Result that I wanted

Code

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solved Why am I getting array instead of vector size? [closed]