Add exception for invalid expression

2014-12-21 16:03:53 +01:00 · 2014-12-21 16:03:53 +01:00 · e3d1870d33
commit e3d1870d33
parent 027a3ac57a
1 changed files with 4 additions and 1 deletions
--- a/pymath/render.py
+++ b/pymath/render.py
@ -40,6 +40,9 @@ class Render(object):
            else:
                operandeStack.push(self.render(token)())

+        if len(operandeStack) > 1:
+            raise ValueError("This postfix_tokens is not a valid expression")
+        else:
            return operandeStack.pop()

 def txt_render(token):