ros.py 文件源码

def equation(operation, firstnum, secondnum):
    if not isnumber(firstnum) and isnumber(secondnum):
        raise RuntimeError('An Error Has Occured: One Of The Values Specified Is Not A Number (0002)')
    if operation == 'plus':
        return (firstnum + secondnum)
    elif operation == 'minus':
        return (firstnum - secondnum)
    elif operation == 'multiply':
        return (firstnum * secondnum)
    elif operation == 'divide':
        return (firstnum / secondnum)
    else:
        raise RuntimeError('An Error Has Occured: You Entered An Invalid Operation (0003)')

# Preform Scientific Operations