factor = Forward()
factor << (atom | expr)
term = (factor | expr) + ZeroOrMore(multop + expr)
addterm = (term | expr) + ZeroOrMore(addop + expr)
expr << ((lpar + expr + rpar) | addterm)
bnf = expr
pattern = bnf + StringEnd()
# map operator symbols to corresponding arithmetic operations
opn = {
"+": (lambda a, b: numpy.add(a, b)),
"-": (lambda a, b: numpy.subtract(a, b)),
"*": (lambda a, b: numpy.multiply(a, b)),
"/": (lambda a, b: MathOperations.divisionLim(a, b)),
"^": (lambda a, b: numpy.power(a, b)),
"<": (lambda a, b: numpy.less(a, b)),
">": (lambda a, b: numpy.greater(a, b)),
"=": (lambda a, b: numpy.equal(a, b)),
"!=": (lambda a, b: numpy.not_equal(a, b)),
"<=": (lambda a, b: numpy.less_equal(a, b)),
">=": (lambda a, b: numpy.greater_equal(a, b)),
}
func = {
"sin": numpy.sin,
"asin": numpy.arcsin,
"cos": numpy.cos,
"abs": numpy.abs,
"acos": numpy.arccos,
factor = Forward()
factor << (atom | expr)
term = (factor | expr) + ZeroOrMore( multop + expr )
addterm = (term | expr) + ZeroOrMore( addop + expr )
expr << ((lpar + expr + rpar) | addterm)
bnf = expr
pattern = bnf + StringEnd()
# map operator symbols to corresponding arithmetic operations
opn = { "+" : ( lambda a,b: numpy.add( a, b ) ),
"-" : ( lambda a,b: numpy.subtract( a, b ) ),
"*" : ( lambda a,b: numpy.multiply( a, b ) ),
"/" : ( lambda a,b: MathOperations.divisionLim( a, b ) ),
"^" : ( lambda a,b: numpy.power( a, b) ),
"<" : ( lambda a,b: numpy.less( a, b) ),
">" : ( lambda a,b: numpy.greater( a, b) ),
"=" : ( lambda a,b: numpy.equal( a, b) ),
"!=" : ( lambda a,b: numpy.not_equal( a, b) ),
"<=" : ( lambda a,b: numpy.less_equal( a, b) ),
">=" : ( lambda a,b: numpy.greater_equal( a, b) )
}
func = { "sin": numpy.sin,
"asin": numpy.arcsin,
"cos": numpy.cos,
"abs": numpy.abs,
"acos": numpy.arccos,
"tan": numpy.tan,
