Fourier series in Python

[Armandito]

Hello everyone,

I'm new here so I hope I'm in the right place to ask some questions !

I would like to get the equation of the Fourier series of a (complex) curve.
There are a few scripts on the internet that plot the Fourier series curve at different orders, but none of them give the equation (or work). I looked for an existing function but it doesn't seem to exist .....

I have linked to this post a screenshot of a curve that I would like to get the Fourier series. As you can see, I can plot the curve, but I don't get the equation.

For those who know MatLab, I'm looking for a function like the "fit" function : https://fr.mathworks.com/help/curvefit/fourier.html

I hope that my post was clear enough ! :)

Thanks for your help !