如何使用pdfrw库编辑可编辑pdf？

Question

我一直在研究如何使用Python编辑PDF，我发现了这篇文章：
How to Populate Fillable PDF's with Python

但是有一个问题，一旦程序运行，你打开PDF文件，文件并没有填充，只有当你点击标签，它显示数据，当你点击离开它再次消失。这是其他人在网上写的代码。在

#! /usr/bin/python

import os
import pdfrw


INVOICE_TEMPLATE_PATH = 'invoice_template.pdf'
INVOICE_OUTPUT_PATH = 'invoice.pdf'


ANNOT_KEY = '/Annots'
ANNOT_FIELD_KEY = '/T'
ANNOT_VAL_KEY = '/V'
ANNOT_RECT_KEY = '/Rect'
SUBTYPE_KEY = '/Subtype'
WIDGET_SUBTYPE_KEY = '/Widget'


def write_fillable_pdf(input_pdf_path, output_pdf_path, data_dict):
    template_pdf = pdfrw.PdfReader(input_pdf_path)
    annotations = template_pdf.pages[0][ANNOT_KEY]
    for annotation in annotations:
        if annotation[SUBTYPE_KEY] == WIDGET_SUBTYPE_KEY:
            if annotation[ANNOT_FIELD_KEY]:
                key = annotation[ANNOT_FIELD_KEY][1:-1]
                if key in data_dict.keys():
                    annotation.update(
                        pdfrw.PdfDict(V='{}'.format(data_dict[key]))
                    )
    pdfrw.PdfWriter().write(output_pdf_path, template_pdf)


data_dict = {
   'business_name_1': 'Bostata',
   'customer_name': 'company.io',
   'customer_email': 'joe@company.io',
   'invoice_number': '102394',
   'send_date': '2018-02-13',
   'due_date': '2018-03-13',
   'note_contents': 'Thank you for your business, Joe',
   'item_1': 'Data consulting services',
   'item_1_quantity': '10 hours',
   'item_1_price': '$200/hr',
   'item_1_amount': '$2000',
   'subtotal': '$2000',
   'tax': '0',
   'discounts': '0',
   'total': '$2000',
   'business_name_2': 'Bostata LLC',
   'business_email_address': 'hi@bostata.com',
   'business_phone_number': '(617) 930-4294'
}

if __name__ == '__main__':
    write_fillable_pdf(INVOICE_TEMPLATE_PATH, INVOICE_OUTPUT_PATH, data_dict)

Answer 1

更新write函数使键AP和V在preview中修复了我的问题

pdfrw.PdfDict(AP=data_dict[key], V=data_dict[key])

Answer 2

我发现如果您添加NeedAppearances参数，您将解决您的问题：

template_pdf = pdfrw.PdfReader(TEMPLATE_PATH)
template_pdf.Root.AcroForm.update(pdfrw.PdfDict(NeedAppearances=pdfrw.PdfObject('true')))