如何在python中填写PDF表单？

Posted 2023-05-07

【中文标题】如何在python中填写PDF表单？

【英文标题】：How to fill PDF form in python?

【发布时间】：2013-07-19 09:00:41

【问题描述】：

我正在寻找用数据库数据表格填充预制 pdf 并“展平”它的最佳方法。现在我使用 pdftk，但它不能正确处理国家字符

是否有任何 python 库或示例如何填写 pdf 表单并将其呈现为不可编辑的 PDF？

【问题讨论】：

我不明白你到底想要什么，但 ReportLab 是一个广泛使用的 PDF 的 Python 库。

参考这个答案：***.com/questions/1890570/…

@AntonisChristofides，OP 正在寻求一种简单的方法来扁平化（读取合并）表单字段与数据库内容。我的猜测是，他会在 Python 字典和预制的 PDF 表中打印内容。无论如何，ReportLab - 正如你所建议的那样 - 至少对我来说是要走的路。

【参考方案1】：

试试 fillpdf 库，它让这个过程变得非常简单（pip install fillpdf 和 poppler 依赖 conda install -c conda-forge poppler）

基本用法：

from fillpdf import fillpdfs

fillpdfs.get_form_fields("blank.pdf")

# returns a dictionary of fields
# Set the returned dictionary values a save to a variable
# For radio boxes ('Off' = not filled, 'Yes' = filled)

data_dict = 
'Text2': 'Name',
'Text4': 'LastName',
'box': 'Yes',


fillpdfs.write_fillable_pdf('blank.pdf', 'new.pdf', data_dict)

# If you want it flattened:
fillpdfs.flatten_pdf('new.pdf', 'newflat.pdf')

更多信息在这里： https://github.com/t-houssian/fillpdf

似乎填得很好。

在此处查看此答案以获取更多信息：https://***.com/a/66809578/13537359

【参考方案2】：

您不需要一个库来展平 PDF，根据 Adob​​e Docs，您可以将可编辑表单字段的位位置更改为 1 以使字段只读。我在这里提供了一个完整的解决方案，但它使用了 Django：

https://***.com/a/55301804/8382028

Adobe Docs（第 552 页）：

https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/pdf_reference_archives/PDFReference.pdf

使用 PyPDF2 填充字段，然后循环注释以更改位位置：

from io import BytesIO
import PyPDF2
from PyPDF2.generic import BooleanObject, NameObject, IndirectObject, NumberObject

# open the pdf
input_stream = open("YourPDF.pdf", "rb")
pdf_reader = PyPDF2.PdfFileReader(input_stream, strict=False)
if "/AcroForm" in pdf_reader.trailer["/Root"]:
    pdf_reader.trailer["/Root"]["/AcroForm"].update(
        NameObject("/NeedAppearances"): BooleanObject(True))

pdf_writer = PyPDF2.PdfFileWriter()
set_need_appearances_writer(pdf_writer)
if "/AcroForm" in pdf_writer._root_object:
    # Acro form is form field, set needs appearances to fix printing issues
    pdf_writer._root_object["/AcroForm"].update(
        NameObject("/NeedAppearances"): BooleanObject(True))

data_dict = dict() # this is a dict of your DB form values

pdf_writer.addPage(pdf_reader.getPage(0))
page = pdf_writer.getPage(0)
# update form fields
pdf_writer.updatePageFormFieldValues(page, data_dict)
for j in range(0, len(page['/Annots'])):
    writer_annot = page['/Annots'][j].getObject()
    for field in data_dict:
        if writer_annot.get('/T') == field:
            writer_annot.update(
                NameObject("/Ff"): NumberObject(1)    # make ReadOnly
            )
output_stream = BytesIO()
pdf_writer.write(output_stream)

# output_stream is your flattened PDF


def set_need_appearances_writer(writer):
    # basically used to ensured there are not 
    # overlapping form fields, which makes printing hard
    try:
        catalog = writer._root_object
        # get the AcroForm tree and add "/NeedAppearances attribute
        if "/AcroForm" not in catalog:
            writer._root_object.update(
                NameObject("/AcroForm"): IndirectObject(len(writer._objects), 0, writer))

        need_appearances = NameObject("/NeedAppearances")
        writer._root_object["/AcroForm"][need_appearances] = BooleanObject(True)


    except Exception as e:
        print('set_need_appearances_writer() catch : ', repr(e))

    return writer  

【参考方案3】：

我们也可以考虑使用 API 而不是导入包来处理 PDF。这种方式有它自己的优点/缺点，但是它为我们提供了新的视角来增强我们的应用程序！

其中一个例子是使用 PDF.co API 来填写 PDF 表单。您还可以考虑其他替代方案，例如 Adob​​e API、DocSpring、pdfFiller 等。下面的代码 sn-p 可能很有用，它演示了使用预定义的 JSON 有效负载填充 PDF 表单。

import os
import requests # pip install requests

# The authentication key (API Key).
# Get your own by registering at https://app.pdf.co/documentation/api
API_KEY = "**************************************"

# Base URL for PDF.co Web API requests
BASE_URL = "https://api.pdf.co/v1"


def main(args = None):
    fillPDFForm()


def fillPDFForm():
    """Fill PDF form using PDF.co Web API"""

    # Prepare requests params as JSON
    # See documentation: https://apidocs.pdf.co
    payload = "\n    \"async\": false,\n    \"encrypt\": false,\n    \"name\": \"f1040-filled\",\n    \"url\": \"https://bytescout-com.s3-us-west-2.amazonaws.com/files/demo-files/cloud-api/pdf-form/f1040.pdf\",\n    \"fields\": [\n        \n            \"fieldName\": \"topmostSubform[0].Page1[0].FilingStatus[0].c1_01[1]\",\n            \"pages\": \"1\",\n            \"text\": \"True\"\n        ,\n        \n            \"fieldName\": \"topmostSubform[0].Page1[0].f1_02[0]\",\n            \"pages\": \"1\",\n            \"text\": \"John A.\"\n        ,        \n        \n            \"fieldName\": \"topmostSubform[0].Page1[0].f1_03[0]\",\n            \"pages\": \"1\",\n            \"text\": \"Doe\"\n        ,        \n        \n            \"fieldName\": \"topmostSubform[0].Page1[0].YourSocial_ReadOrderControl[0].f1_04[0]\",\n            \"pages\": \"1\",\n            \"text\": \"123456789\"\n        ,\n        \n            \"fieldName\": \"topmostSubform[0].Page1[0].YourSocial_ReadOrderControl[0].f1_05[0]\",\n            \"pages\": \"1\",\n            \"text\": \"Joan B.\"\n        ,\n        \n            \"fieldName\": \"topmostSubform[0].Page1[0].YourSocial_ReadOrderControl[0].f1_05[0]\",\n            \"pages\": \"1\",\n            \"text\": \"Joan B.\"\n        ,\n        \n            \"fieldName\": \"topmostSubform[0].Page1[0].YourSocial_ReadOrderControl[0].f1_06[0]\",\n            \"pages\": \"1\",\n            \"text\": \"Doe\"\n        ,\n        \n            \"fieldName\": \"topmostSubform[0].Page1[0].YourSocial_ReadOrderControl[0].f1_07[0]\",\n            \"pages\": \"1\",\n            \"text\": \"987654321\"\n             \n\n\n\n    ],\n    \"annotations\":[\n        \n            \"text\":\"Sample Filled with PDF.co API using /pdf/edit/add. Get fields from forms using /pdf/info/fields\",\n            \"x\": 10,\n            \"y\": 10,\n            \"size\": 12,\n            \"pages\": \"0-\",\n            \"color\": \"FFCCCC\",\n            \"link\": \"https://pdf.co\"\n        \n    ],    \n    \"images\": [        \n    ]\n"

    # Prepare URL for 'Fill PDF' API request
    url = "/pdf/edit/add".format(BASE_URL)

    # Execute request and get response as JSON
    response = requests.post(url, data=payload, headers="x-api-key": API_KEY, 'Content-Type': 'application/json')
    if (response.status_code == 200):
        json = response.json()

        if json["error"] == False:
            #  Get URL of result file
            resultFileUrl = json["url"]
            # Download result file
            r = requests.get(resultFileUrl, stream=True)
            if (r.status_code == 200):
                with open(destinationFile, 'wb') as file:
                    for chunk in r:
                        file.write(chunk)
                print(f"Result file saved as \"destinationFile\" file.")
            else:
                print(f"Request error: response.status_code response.reason")
        else:
            # Show service reported error
            print(json["message"])
    else:
        print(f"Request error: response.status_code response.reason")

if __name__ == '__main__':
    main()