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defmod(a,b):returna%bdefcalculator(operation,a,b=None):ifoperation=='add':returnadd(a,b)elifoperation=='subtract':returnsubtract(a,b)elifoperation=='multiply':returnmultiply(a,b)elifoperation=='divide':returndivide(a,b)elifoperation=='mod':ifbisNone:raiseValueError("Modulusoperationrequirestwoarguments")returnmod(a,b)else:raiseValueError("Invalidoperation")#Exampleusageprint(calculator('mod',10,3))#Output:1
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defmod(a,b):returna%bdefcalculator(operation,a,b=None):ifoperation=='add':returnadd(a,b)elifoperation=='subtract':returnsubtract(a,b)elifoperation=='multiply':returnmultiply(a,b)elifoperation=='divide':returndivide(a,b)elifoperation=='mod':ifbisNone:raiseValueError("Modulusoperationrequirestwoarguments")returnmod(a,b)else:raiseValueError("Invalidoperation")#Exampleusageprint(calculator('mod',10,3))#Output:1
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