Enhanced docstring for new addCondition method.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/pyparsing.py b/src/pyparsing.py
index 303d4db..6a64487 100644
--- a/src/pyparsing.py
+++ b/src/pyparsing.py
@@ -910,7 +910,9 @@ class ParserElement(object):
         return self

 

     def addCondition(self, *fns, **kwargs):

-        """Add a boolean predicate function to expression's list of parse actions. See L{I{setParseAction}<setParseAction>}."""

+        """Add a boolean predicate function to expression's list of parse actions. See 

+        L{I{setParseAction}<setParseAction>}. Optional keyword argument C{message} can

+        be used to define a custom message to be used in the raised exception."""

         msg = kwargs.get("message") or "failed user-defined condition"

         for fn in fns:

             def pa(s,l,t):