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Add exception for invalid expression

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Lafrite 2014-12-21 16:03:53 +01:00
parent 027a3ac57a
commit e3d1870d33
1 changed files with 4 additions and 1 deletions
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3
pymath/render.py
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@ -40,6 +40,9 @@ class Render(object):
else: else:
operandeStack.push(self.render(token)()) operandeStack.push(self.render(token)())
if len(operandeStack) > 1:
raise ValueError("This postfix_tokens is not a valid expression")
else:
return operandeStack.pop() return operandeStack.pop()
def txt_render(token): def txt_render(token):