[PATH] make -custom- op compliant. Improve gcode_pre importer

src/Mod/Path/PathScripts/post/example_pre.py

@@ -25,7 +25,8 @@
 '''
 This is an example preprocessor file for the Path workbench. Its aim is to
 open a gcode file, parse its contents, and create the appropriate objects
-in FreeCAD.
+in FreeCAD. This preprocessor will not add imported gcode to an existing
+job. For a more useful preprocessor, look at the gcode_pre.py file
 
 Read the Path Workbench documentation to know how to create Path objects
 from GCode.
@@ -76,8 +77,8 @@ def parse(inputstring):
     PathLog.track(inputstring)
     # split the input by line
     lines = inputstring.split("\n")
-    output = [] #""
-    lastcommand = None 
+    output = []
+    lastcommand = None
 
     for lin in lines:
         # remove any leftover trailing and preceding spaces
@@ -98,8 +99,7 @@ def parse(inputstring):
             continue
         if lin[0].upper() in ["G", "M"]:
             # found a G or M command: we store it
-            #output += lin + "\n"
-            output.append(Path.Command(str(lin))) # + "\n"
+            output.append(Path.Command(str(lin)))
             last = lin[0].upper()
             for c in lin[1:]:
                 if not c.isdigit():
@@ -109,7 +109,7 @@ def parse(inputstring):
             lastcommand = last
         elif lastcommand:
             # no G or M command: we repeat the last one
-            output.append(Path.Command(str(lastcommand + " " + lin))) # + "\n"
+            output.append(Path.Command(str(lastcommand + " " + lin)))
 
     print("done preprocessing.")
     return output