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python Programming Glossary: self.pushfirst

Safe way to parse user-supplied mathematical formula in Python

http://stackoverflow.com/questions/11951701/safe-way-to-parse-user-supplied-mathematical-formula-in-python

pi e fnumber ident lpar expr rpar .setParseAction self.pushFirst pyp.Optional pyp.oneOf pyp.Group lpar expr rpar .setParseAction.. factor atom pyp.ZeroOrMore expop factor .setParseAction self.pushFirst term factor pyp.ZeroOrMore multop factor .setParseAction self.pushFirst.. term factor pyp.ZeroOrMore multop factor .setParseAction self.pushFirst expr term pyp.ZeroOrMore addop term .setParseAction self.pushFirst..

Evaluating a mathematical expression in a string

http://stackoverflow.com/questions/2371436/evaluating-a-mathematical-expression-in-a-string

oneOf pi e fnumber ident lpar expr rpar .setParseAction self.pushFirst Optional oneOf Group lpar expr rpar .setParseAction self.pushUMinus.. factor atom ZeroOrMore expop factor .setParseAction self.pushFirst term factor ZeroOrMore multop factor .setParseAction self.pushFirst.. term factor ZeroOrMore multop factor .setParseAction self.pushFirst expr term ZeroOrMore addop term .setParseAction self.pushFirst..