Python merge PDF images

Yu Shang Palace 2020-11-17 08:30:46
python merge pdf images

1. origin

Recently I need to organize my notes into a pdf Preservation , So we studied how to use Python The code merges all the photos taken into one pdf.

2. The process

To get a requirement, the most important thing is to split large tasks into small modules , Break one by one .

2.1 Taking pictures

The first step is to take all the pages of the book , It should be noted that the page number of the book should be taken , Because the following sort is sorted by file name , The file name of the photo is basically generated according to the time , If it's a mess , Generated at that time pdf The page numbers inside will also be out of order .

2.2 Python Operation Library

Python The best part is that there are lots of third-party libraries that can help us quickly implement the methods we want , We found two libraries ,
PyFPDF  and img2pdf, We choose img2pdf To fulfill our needs
pip install img2pdf



2.3 Python Go through the folder to get pictures

 dirname = "f:/wlzcool"
imgs = []
for fname in os.listdir(dirname):
if not fname.endswith(".jpg"):
path = os.path.join(dirname, fname)
if os.path.isdir(path):


Note that if the file name of the image is a pure number and the number of digits is different , The order would be 1 And then 10 instead of 2, You need an extra sort of sorting of numbers , If the file is taken by mobile phone, there is no such problem .

files.sort(key=lambda x: int(x[:-4]))



2.4 Rotate the image display direction and compress pixels

Sometimes the pictures taken by the mobile phone are horizontal , It needs to be changed to vertical
use rotate When you rotate, you need to add expand=True This parameter , Otherwise, there will be black edges .
The photo pixels of the phone are too high , Some need to be compressed to ensure that the final generated pdf The size is moderate .

 img =
if img.size[0] > img.size[1]:
im_rotate = img.rotate(90, expand=True)
size = (int(im_rotate.size[0] / 3), int(im_rotate.size[1] / 3))
im_rotate = im_rotate.resize(size), quality=95)
size = (int(img.size[0] / 3), int(img.size[1] / 3))
img = img.resize(size), quality=95)



2.5 The overall code

There are many things to consider when writing a script , For ease of use , The parameters need to be changed to allow user input . For example, the path of the image folder , Compression ratio and so on

from PIL import Image
import os
import img2pdf
flag = False
while not flag:
dirname = input(" Please enter the path of the picture folder ( for example d:/wlzcool):")
flag = os.path.exists(dirname)
if not flag:
print(" Image folder path does not exist !")
saveflag = False
while not saveflag:
savedirname = input(" Please enter the path of the destination image folder ( for example d:/wlzcool2):")
saveflag = os.path.exists(savedirname)
if not saveflag:
print(" Image folder path does not exist !")
automakedir = input(" Whether to create the corresponding folder automatically ?( yes Y/ no N):")
if automakedir.strip().upper() == "Y":
saveflag = True
files = os.listdir(dirname)
reductionFactor = int(input(" Please input the length width compression ratio ( for example 3):"))
if reductionFactor <= 0:
reductionFactor = 3
isConvertBlack = input(" Whether to output black and white version ?( yes Y/ no N):").strip().upper() == "Y"
for fname in files:
if not fname.endswith(".jpg"):
path = os.path.join(dirname, fname)
savePath = os.path.join(savedirname, fname)
if os.path.isdir(path):
img =
if img.size[0] > img.size[1]:
im_rotate = img.rotate(90, expand=True)
size = (int(im_rotate.size[0] / reductionFactor), int(im_rotate.size[1] / reductionFactor))
im_rotate = im_rotate.resize(size)
if isConvertBlack:
im_rotate = im_rotate.convert("L"), quality=95)
size = (int(img.size[0] / reductionFactor), int(img.size[1] / reductionFactor))
img = img.resize(size)
if isConvertBlack:
img = img.convert("L"), quality=95)
filename = input(" Please input the output file name ( for example : Chapter one ):")
with open(filename + ".pdf", "wb") as f:
imgs = []
files = os.listdir(savedirname)
for fname in files:
if not fname.endswith(".jpg"):
path = os.path.join(savedirname, fname)
if os.path.isdir(path):



2.6 Package the script into exe

All computers don't have Python Environmental Science , We need to package the script as exe Easy to use on any computer .
Use  PyInstaller To package scripts

2.6.1 install  PyInstaller

pip install pyinstaller



2.6.2 Packaging script

In the path where the script is located cmd Execute the following command in

pyinstaller -F


Life is too short , I use Python, Powerful third-party libraries can save us a lot of time to develop an interesting Python Picture merge pdf Small application of ,Python It's just cool !

Welcome to my official account. : Temporary camp , Get the latest article

本文为[Yu Shang Palace]所创,转载请带上原文链接,感谢

  1. 利用Python爬虫获取招聘网站职位信息
  2. Using Python crawler to obtain job information of recruitment website
  3. Several highly rated Python libraries arrow, jsonpath, psutil and tenacity are recommended
  4. Python装饰器
  5. Python实现LDAP认证
  6. Python decorator
  7. Implementing LDAP authentication with Python
  8. Vscode configures Python development environment!
  9. In Python, how dare you say you can't log module? ️
  10. 我收藏的有关Python的电子书和资料
  11. python 中 lambda的一些tips
  12. python中字典的一些tips
  13. python 用生成器生成斐波那契数列
  14. python脚本转pyc踩了个坑。。。
  15. My collection of e-books and materials about Python
  16. Some tips of lambda in Python
  17. Some tips of dictionary in Python
  18. Using Python generator to generate Fibonacci sequence
  19. The conversion of Python script to PyC stepped on a pit...
  20. Python游戏开发,pygame模块,Python实现扫雷小游戏
  21. Python game development, pyGame module, python implementation of minesweeping games
  22. Python实用工具,email模块,Python实现邮件远程控制自己电脑
  23. Python utility, email module, python realizes mail remote control of its own computer
  24. 毫无头绪的自学Python,你可能连门槛都摸不到!【最佳学习路线】
  25. Python读取二进制文件代码方法解析
  26. Python字典的实现原理
  27. Without a clue, you may not even touch the threshold【 Best learning route]
  28. Parsing method of Python reading binary file code
  29. Implementation principle of Python dictionary
  30. You must know the function of pandas to parse JSON data - JSON_ normalize()
  31. Python实用案例,私人定制,Python自动化生成爱豆专属2021日历
  32. Python practical case, private customization, python automatic generation of Adu exclusive 2021 calendar
  33. 《Python实例》震惊了,用Python这么简单实现了聊天系统的脏话,广告检测
  34. "Python instance" was shocked and realized the dirty words and advertisement detection of the chat system in Python
  35. Convolutional neural network processing sequence for Python deep learning
  36. Python data structure and algorithm (1) -- enum type enum
  37. 超全大厂算法岗百问百答(推荐系统/机器学习/深度学习/C++/Spark/python)
  38. 【Python进阶】你真的明白NumPy中的ndarray吗?
  39. All questions and answers for algorithm posts of super large factories (recommended system / machine learning / deep learning / C + + / spark / Python)
  40. [advanced Python] do you really understand ndarray in numpy?
  41. 【Python进阶】Python进阶专栏栏主自述:不忘初心,砥砺前行
  42. [advanced Python] Python advanced column main readme: never forget the original intention and forge ahead
  43. python垃圾回收和缓存管理
  44. java调用Python程序
  45. java调用Python程序
  46. Python常用函数有哪些?Python基础入门课程
  47. Python garbage collection and cache management
  48. Java calling Python program
  49. Java calling Python program
  50. What functions are commonly used in Python? Introduction to Python Basics
  51. Python basic knowledge
  52. Anaconda5.2 安装 Python 库(MySQLdb)的方法
  53. Python实现对脑电数据情绪分析
  54. Anaconda 5.2 method of installing Python Library (mysqldb)
  55. Python implements emotion analysis of EEG data
  56. Master some advanced usage of Python in 30 seconds, which makes others envy it
  57. python爬取百度图片并对图片做一系列处理
  58. Python crawls Baidu pictures and does a series of processing on them
  59. python链接mysql数据库
  60. Python link MySQL database