How to unlock a “secured” (read-protected) PDF in Python?

Refer, pikepdf, which is based on qpdf. It automatically converts pdfs to be extractable.

Code for Reference:

import pikepdf
def remove_password_from_pdf(filename, password=None):
    pdf = pikepdf.open(filename, password=password)
    pdf.save("pdf_file_with_no_password.pdf")

if __name__ == "__main__":
    remove_password_from_pdf(filename="/path/to/file")