# Example usage: 
# > python "C:\Users\jborthen\Desktop\Desktop Files\Python\Python Scripts\compareFiles.py"
# > Input path to File1:  'C:\Users\jborthen\Desktop\SDWE\SDWE\UPDAT_Files\Systems\TBEC_add.upd'
# > Input path to File2:  'C:\Users\jborthen\Desktop\SDWE\SDWE\UPDAT_Files\PECPs\pecp024.upd'

import os

os.chdir('C:\Users\jborthen\Desktop\Desktop Files\Python\Python Scripts')

File1=input("\nInput path to File1:  ")
File2=input("\nInput path to File2:  ")

with open(File1, 'r') as file1:
    with open(File2, 'r') as file2:
        same1to2 = set(file1).difference(file2)

same1to2.discard('\n')

with open(File2, 'r') as file2:
    with open(File1, 'r') as file1:
        same2to1 = set(file2).difference(file1)

same2to1.discard('\n')

with open('File_Comparison.txt', 'w') as file_out:
	file_out.write(" ==================================================================================\n\n")
	file_out.write("  File1:  " + File1 +"\n")
	file_out.write("  File2:  " + File2 + "\n\n")
	file_out.write(" ==================================================================================\n\n")
	file_out.write("Items in File1 but not in File2:\n\n")
	for line1 in same1to2:
		if not line1.startswith("#"):
			file_out.write("   " + line1)
	
	file_out.write("\n\nItems in File2 but not in File1:\n\n")
	for line2 in same2to1:
		if not line2.startswith("#"):
			file_out.write("   " + line2)