Created
November 29, 2017 21:14
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calculator which can take lists and uses map-reduce functions
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| class Calculator(object): # define a calculator object | |
| def add(self, x): # define addition function | |
| # use comprehebnsion to check that all | |
| # elements in a list are numeric | |
| number_types = (int, long, float, complex) # accepted number types | |
| if all(isinstance(item, number_types) for item in x): | |
| return reduce(lambda a,b: a+b, x) | |
| else: | |
| raise ValueError # if one or both values are not accepted number types return a Value Error | |
| def subtract(self, x): # define addition function | |
| return reduce(lambda a,b: a-b, x) | |
| def mult(self, x): # define addition function | |
| return reduce(lambda a,b: a*b, x) | |
| def square(self, x): | |
| return map(lambda a: a*a, x) |
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