avoid flag day by detecting when lc is 1st arg to myblock()

1 files changed, 7 insertions, 1 deletions

diff --git a/TurtleArt/tajail.py b/TurtleArt/tajail.py
index c8cea7f..3fcf997 100644
--- a/TurtleArt/tajail.py
+++ b/TurtleArt/tajail.py
@@ -25,6 +25,7 @@ from math import *
 
 
 def myfunc(f, args):
+    ''' Run inline Python code '''
     # check to make sure no import calls are made
     if len(args) == 1:
         myf = 'def f(x): return ' + f.replace('import', '')
@@ -44,10 +45,15 @@ def myfunc(f, args):
 
 
 def myfunc_import(parent, f, x):
+    ''' Run Python code imported from Journal '''
+    if 'def myblock(lc,' in  f:
+        base_class = parent.tw.lc  # pre-v107, we passed lc
+    else:
+        base_class = parent.tw  # as of v107, we pass tw
     userdefined = {}
     try:
         exec f in globals(), userdefined
-        return userdefined['myblock'](parent.tw, x)
+        return userdefined['myblock'](base_class, x)
     except:
         traceback.print_exc()
         return None