no packrat for python3, darn

2 files changed, 17 insertions, 2 deletions

diff --git a/INSTALL.txt b/INSTALL.txt
index a6a21d52..76e138e5 100644
--- a/INSTALL.txt
+++ b/INSTALL.txt
@@ -19,4 +19,5 @@ The best way to do this is to install ``distribute`` on Python 3 before installi
   sudo python3 distribute_setup.py
 
   sudo python3 setup.py install
-  
+
+2to3 won't run if there's a ``build`` directory that's newer than your source code.  Deleting the ``cmd2/build`` directory before running setup.py ensures that this won't be a problem.  
diff --git a/cmd2.py b/cmd2.py
index 2d4cc76b..ebbfab5a 100755
--- a/cmd2.py
+++ b/cmd2.py
@@ -41,10 +41,24 @@ import copy
 from code import InteractiveConsole, InteractiveInterpreter
 from optparse import make_option
 import pyparsing
-pyparsing.ParserElement.enablePackrat()
 
 __version__ = '0.6.3'
 
+if sys.version_info[0] == 2:
+    pyparsing.ParserElement.enablePackrat()
+
+"""
+Packrat is causing Python3 errors that I don't understand.
+
+> /usr/local/Cellar/python3/3.2/lib/python3.2/site-packages/pyparsing-1.5.6-py3.2.egg/pyparsing.py(999)scanString()
+-> nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )
+(Pdb) n
+NameError: global name 'exc' is not defined
+
+(Pdb) parseFn
+<bound method Or._parseCache of {Python style comment ^ C style comment}>
+"""
+
 class OptionParser(optparse.OptionParser):
     def exit(self, status=0, msg=None):
         self.values._exit = True