# Python3 program to convert PNG images in a folder to JPG of specified quality
# This script should be stored in the same folder where PNG files are stored.
# Since Linux OS is case sensitive, the extension of PNG file is checked for
# both lower and upper case. The extension JPG in output is added in lowercase.
#------------------------------------------------------------------------------  
# Import necessary libraries
from PIL import Image
import os, sys, glob

qty = 75
extn = 'png'
folder = os.getcwd()	
i = 0
for path, subdirs, files in os.walk(folder):
	for name in files:
		fn = name
		ext1 = os.path.splitext(fn)[-1].lower()
		ext2 = ext1.partition('.')[2]
		if (ext2 == extn):
			img = Image.open(fn)
			jpg_file = fn.strip(ext1) + ".jpg"
  
			# Save image in JPG format
			img.save(jpg_file, "JPEG", quality=qty, optimize=True)
  
			# Close image file
			img.close()
  			
			i = i + 1
			# Print User Message
			print("File number " + str(i) + " converted to JPG format")
print("\n")