Having multiple pyfpdf object, hence creating empty pdf document.

[Puneet-Singh1996]

  from fpdf import FPDF 
  import multiprocessing
  from multiprocessing import Pool

  class pdf_gen():
    def __init__(self):
      pdf = self.pdf = FPDF()
      pdf.set_auto_page_break(True,0.1)

    def get_data_from_mysql(self):
      pdf = self.pdf
      # connection is established and result is stored in 'res'.
      dup = []
      dup.insert(0,res)
      z = tuple(dup)
      return z

    def mysql_to_pdf_data(self,*result) :
       try : 
         pdf = self.pdf 
         # Entered data need to be in pdf
         finally: 
         return pdf

   if __name__ == "__main__" :
     class_pdf_object = pdf_gen()
     pdf_object = FPDF()
     recover_data = class_pdf_object.get_data_from_mysql()
     pool = multiprocessing.Pool(multiprocessing_count())
     for recover_data_list in range(len(recover_data[0])):
       pdf = pool.map(class_pdf_object.mysql_to_pdf_data,recover_data[0])
       pool.close()
       pool.join()
     pdf_object.output('savefile.pdf','F')

In the above program, pdf_object is creating empty pdf file as the object in class needs to be passed for output. But, recover_data contains a list and each value is parsing and returning different object of pyfpdf. How should I create single output file. Any help would be appreciated. I know it can be done with the help pdf_object('savefile.pdf','S') as it return document as byteString.