This script merges all pdf files in a folder into one pdf file

pdfmerger.py

## This script merges all pdf files in a folder into one pdf file
## Usage: python pdfmerger.py <path to folder with pdf files> <path to output file>
## Example: python pdfmerger.py ./pdfs ./merged.pdf
## Author: @asahicantu
## Date: 2021-10-07
## Version: 1.0
## License: MIT
## Requirements: pypdf
## Tested on: Windows 10
## How to use:
## 1. Install pypdf: pip install pypdf
## 2. Run the script: python pdfmerger.py <path to folder with pdf files> <path to output file>
## 3. The script will merge all pdf files in the folder into one pdf file
## 4. The script will create the output file if it doesn't exist
## 5. The script will overwrite the output file if it exists
## 6. The script will create the output file if it doesn't exist
import os
import sys
from pypdf import PdfReader, PdfWriter # pip instal pypdf
pdf_path = sys.argv[1] # sys.argv[0] is the script name
out_path = sys.argv[2]
print(f"Reading path {pdf_path}")
pdf_files = os.listdir(pdf_path)

pdf_writer = PdfWriter()
for pdf_file in pdf_files:
    pdf_file = os.path.join(pdf_path, pdf_file)
    print(f"Opening {pdf_file}...")
    pdf_reader = PdfReader(pdf_file)
    print(f"file contains {len(pdf_reader.pages)}")
    print(f"merging pages...")
    for page in pdf_reader.pages:
        pdf_writer.add_page(page)
    print(f"done")

print(f"writing file...")
pdf_writer.write(out_path)
print(f"done")