Javascript code added via addJS gets executed twice #482
Description
When using addJS with PyPDF 1.26.0 on Python 3.6.1 to add Javascript logic to a PDF, this Javascript gets executed twice when opening the PDF instead of once. When using the following sample code, the message box gets shown twice when opening the file in Adobe Reader XI on Windows 7 instead of only once as expected:
from PyPDF2 import PdfReader, PdfWriter
def extract(input_pdf, output_pdf, page):
reader = PdfReader(input_pdf)
writer = PdfWriter()
page = reader.pages[page - 1]
writer.add_page(pdf_page)
writer.add_js('app.alert("Startup");')
with open(output_pdf, "wb") as f:
writer.write(f)Sample usage:
extract("my_file.pdf", "my_file_withjs.pdf", 1)