PDF Compression in Windows using Python and Ghostscript

compress.py

import os
import time

'''
1. Download https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/download/gs9533/gs9533w64.exe
2. Install Ghostscript from the exe.
3. Confirm that gswin64c.exe is present in C:\\Program Files\\gs\\gs9.53.3\\bin
4. Place this python file in a folder containing all the PDFs to be compressed.
5. Run 'python compress.py' from a command prompt (don't use powershell).
6. Compressed files will be saved in 'Compressed' subfolder.
'''

startTime = time.time()

ghostscriptPath = 'C:\\PROGRA~1\\gs\\gs9.53.3\\bin\\gswin64c.exe '
ghostscriptParams = "-sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -q "

inputFiles = [x for x in os.listdir() if x.endswith(".pdf")]

fileCount = 0

if len(inputFiles) > 0 and not os.path.exists('Compressed'):
	os.makedirs('Compressed')

print("Compressing " + str(len(inputFiles)) + " file(s).\n")

for inputFile in sorted(inputFiles):
	fileCount += 1
	outputFileParam = '-o "Compressed/' + inputFile[:-4] + '_Compressed.pdf" '
	inputFile = '"' + inputFile + '"'
	cmd = ghostscriptPath + ghostscriptParams + outputFileParam + inputFile
	print(str(fileCount) + ". " + inputFile)
	os.system(cmd)

endTime = time.time()

print("\nCompleted. Time Taken: " + str(round(endTime - startTime, 2)) + " seconds.")