如何使用pypdf2创建空白Pdf？

Question

import PyPDF2
writer = PyPDF2.PdfFileWriter()
writer.addBlankPage(219, 297)
with open (r"C:\\Users\\Aditya\\.spyder-py3\\scripting in python\\sample pdf with python\\mergedpdf.pdf","wb") as file:
    writer.write(file)
    file.close()

无法使用此文件创建pdf。