compile a file(into another file)

cpq.py

@@ -1,4 +1,5 @@
 import sly
+import sys
 # for ease of reading, the compiler is broken down to multiple files
 # parser.py for the parser
 # lexer.py for the lexer
@@ -8,35 +9,24 @@ from parser import Parser
 from helper import print_err
 
 
-
-
 print_err('Aviv Romem')
+
+if len(sys.argv) != 2 or not sys.argv[1].endswith('.ou'):
+    print('USAGE: python cpq.py <file-name>.ou')
+    exit(1)
+
+file = sys.argv[1]
+output = file[:-3] + '.qud'
+f = open(file, 'r')
+text = f.read()
+f.close()
 lexer = Lexer()
 parser = Parser()
-text = '''
-a: int;
-{
-    while(a < 10) {
-        a = a + 1;
-        if(a >= 6 || a == 5) 
-            break;
-        else
-            a = a + 0;
-    }
-    output(a);
-    switch(a * 5) {
-        case 1:
-            a = 5;
-            break;
-        case 5:
-            output(a);
-        default:
-            break;
-    }
-    output(a);
-    
-}
-'''
+
+file = sys.argv[1]
+
 parser.parse(lexer.tokenize(text))
-for l, t in enumerate(parser.lines):
-    print(l,':',t)
+if not parser.had_errors:
+    f = open(output, 'w')
+    f.writelines([l + '\n' for l in parser.lines])
+    f.close()