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Python xfloat with division by zero returning inf.
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| ''' | |
| This is a partial solution because several other operator methods | |
| should be overridden for absolute consistency. | |
| The complete list is at: | |
| http://docs.python.org/2/reference/datamodel.html#emulating-numeric-types | |
| http://docs.python.org/3/reference/datamodel.html#emulating-numeric-types | |
| ''' | |
| import math | |
| class xfloat(float): | |
| def __add__(self, n): | |
| return xfloat(super(xfloat, self).__add__(n)) | |
| def __sub__(self, n): | |
| return xfloat(super(xfloat, self).__sub__(n)) | |
| def __mul__(self, n): | |
| return xfloat(super(xfloat, self).__mul__(n)) | |
| def __div__(self, d): | |
| try: | |
| return xfloat(super(xfloat, self).__div__(d)) | |
| except ZeroDivisionError: | |
| return self * float('inf') | |
| def main(): | |
| a = xfloat(-math.pi) | |
| print a / 1.0 | |
| print a / 0.0 | |
| b = a * 2 | |
| print b | |
| print b / 0.0 | |
| c = float(b) | |
| print c / 0.0 | |
| if __name__ == '__main__': | |
| main() |
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