Change metadata of pdf file with pypdf2

Question

I want to add a metadata key-value pair to the metadata of a pdf file.

I found a several years old answer, but I think this is way to complicated. I guess there is a

Answer 1

You can do that using pdfrw

pip install pdfrw

Then run

from pdfrw import PdfReader, PdfWriter   
trailer = PdfReader("myfile.pdf")    
trailer.Info.WhoAmI = "Tarun Lalwani"    
PdfWriter("edited.pdf", trailer=trailer).write()

And then check the PDF Custom Properties