i think its ready

cpq.py

@@ -8,13 +8,15 @@ from lexer import Lexer
 from parser import Parser
 from helper import print_err
 
-
+# print signature
 print_err('Aviv Romem')
 
+# invalid usage
 if len(sys.argv) != 2 or not sys.argv[1].endswith('.ou'):
     print('USAGE: python cpq.py <file-name>.ou')
     exit(1)
 
+# load file and parser
 file = sys.argv[1]
 output = file[:-3] + '.qud'
 f = open(file, 'r')
@@ -24,7 +26,7 @@ lexer = Lexer()
 parser = Parser()
 
 file = sys.argv[1]
-
+# parse and write file if valid
 parser.parse(lexer.tokenize(text))
 if not parser.had_errors:
     f = open(output, 'w')