Fixed UnboundLocalError in oneOf based on new scoping rules in Python 3.4

1 files changed, 3 insertions, 0 deletions

diff --git a/src/pyparsing.py b/src/pyparsing.py
index 12b011c..468fb01 100644
--- a/src/pyparsing.py
+++ b/src/pyparsing.py
@@ -3231,6 +3231,7 @@ def oneOf( strs, caseless=False, useRegex=True ):
         masks = ( lambda a,b: b.startswith(a) )

         parseElementClass = Literal

 

+    symbols = []

     if isinstance(strs,basestring):

         symbols = strs.split()

     elif isinstance(strs, collections.Sequence):

@@ -3240,6 +3241,8 @@ def oneOf( strs, caseless=False, useRegex=True ):
     else:

         warnings.warn("Invalid argument to oneOf, expected string or list",

                 SyntaxWarning, stacklevel=2)

+    if not symbols:

+        return NoMatch()

 

     i = 0

     while i < len(symbols)-1: