From dbf122652d38ba03ff9f9fe4aa9bee3693e6775f Mon Sep 17 00:00:00 2001
From: David Beazley <dave@dabeaz.com>
Date: Fri, 8 May 2015 10:10:55 -0500
Subject: [PATCH] Minor fix to account for bad None arguments for
 tabmodule/lextab

---
 ply/lex.py  | 4 ++++
 ply/yacc.py | 5 ++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/ply/lex.py b/ply/lex.py
index ed1e2ed..772325c 100644
--- a/ply/lex.py
+++ b/ply/lex.py
@@ -859,6 +859,10 @@ def validate_module(self, module):
 # -----------------------------------------------------------------------------
 def lex(module=None, object=None, debug=False, optimize=False, lextab='lextab',
         reflags=0, nowarn=False, outputdir=None, debuglog=None, errorlog=None):
+
+    if lextab is None:
+        lextab = 'lextab'
+
     global lexer
 
     ldict = None
diff --git a/ply/yacc.py b/ply/yacc.py
index e0b4faf..eb02cc2 100644
--- a/ply/yacc.py
+++ b/ply/yacc.py
@@ -2709,7 +2709,7 @@ def write_table(self, tabmodule, outputdir='', signature=''):
 _lr_method = %r
 
 _lr_signature = %r
-    ''' % (filename, __tabversion__, self.lr_method, signature))
+    ''' % (os.path.basename(filename), __tabversion__, self.lr_method, signature))
 
             # Change smaller to 0 to go back to original tables
             smaller = 1
@@ -3183,6 +3183,9 @@ def yacc(method='LALR', debug=yaccdebug, module=None, tabmodule=tab_module, star
          check_recursion=True, optimize=False, write_tables=True, debugfile=debug_file,
          outputdir=None, debuglog=None, errorlog=None, picklefile=None):
 
+    if tabmodule is None:
+        tabmodule = tab_module
+
     # Reference to the parsing method of the last built parser
     global parse