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python Programming Glossary: toksAdding external information to ParseResults before return http://stackoverflow.com/questions/11696338/adding-external-information-to-parseresults-before-return data .dump # main grammar def minorgrammar toks # a simple inner grammar integer Word nums grammar2 integer.. of a for loop with a break t s e next grammar2.scanString toks 0 maxMatches 1 # remove 0'th element from toks del toks 0 #.. toks 0 maxMatches 1 # remove 0'th element from toks del toks 0 # return a new ParseResults the sum of t and everything..
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 easily in other places. ''' def pushFirst self strg loc toks self.exprStack.append toks 0 def pushUMinus self strg loc toks.. ''' def pushFirst self strg loc toks self.exprStack.append toks 0 def pushUMinus self strg loc toks if toks and toks 0 ' ' self.exprStack.append.. self.exprStack.append toks 0 def pushUMinus self strg loc toks if toks and toks 0 ' ' self.exprStack.append 'unary ' def __init__..
Evaluating a mathematical expression in a string http://stackoverflow.com/questions/2371436/evaluating-a-mathematical-expression-in-a-string pyparsing example ''' def pushFirst self strg loc toks self.exprStack.append toks 0 def pushUMinus self strg loc toks.. ''' def pushFirst self strg loc toks self.exprStack.append toks 0 def pushUMinus self strg loc toks if toks and toks 0 ' ' self.exprStack.append.. self.exprStack.append toks 0 def pushUMinus self strg loc toks if toks and toks 0 ' ' self.exprStack.append 'unary ' def __init__..
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