commenting STL converter

windmill-stl.py

@@ -1,7 +1,9 @@
 class Lexer:
     def __init__(self,Data):
+        # remove first line...
         Data = Data.split("\n",1)[1]
         self.data = Data.split()
+        # ... and last line
         self.data = self.data[0:len(self.data)-2]
     
     def lex(self,indice):
@@ -14,15 +16,20 @@ class Parser:
         self.lexer = Lexer
     def parse(self,Data):
         list_triangles = [[[0,0,0],[0,0,0],[0,0,0]] for i in range(int(len(Data)/21))]
-        a=0
+        triangle=0
+        # for all the triangles
         for i in range(0,len(Data),21):
+            # parsing X
             for j in range(0,3):
-                list_triangles[a][0][j] = float(self.lexer.lex(i+8+j))
+                list_triangles[triangle][0][j] = float(self.lexer.lex(i+8+j))
+            # parsing Y
             for j in range(0,3):
-                list_triangles[a][1][j] = float(self.lexer.lex(i+12+j))
+                list_triangles[triangle][1][j] = float(self.lexer.lex(i+12+j))
+            # parsing Z
             for j in range(0,3):
-                list_triangles[a][2][j] = float(self.lexer.lex(i+16+j))
-            a+=1
+                list_triangles[triangle][2][j] = float(self.lexer.lex(i+16+j))
+    
+            triangle+=1
         return list_triangles
 
 
@@ -31,9 +38,7 @@ with open("cube.stl") as file:
     lexer = Lexer(data)
     Data = lexer.getData()
     parser = Parser(lexer)
-    import pprint
-    pp = pprint.PrettyPrinter(indent=4)
-    pp.pprint(parser.parse(Data))
+    print(parser.parse(Data))