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CustomIntFloatDict and IntFloatValueError class code
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| # Create a dictionary that can only hold integers and floats as its values | |
| class IntFloatValueError(Exception): | |
| def __init__(self, value): | |
| self.value = value | |
| def __str__(self): | |
| return '{} is invalid input, CustomIntFloatDict can only accept ' \ | |
| 'integers and floats as its values'.format(self.value) | |
| class KeyValueContructError(Exception): | |
| def __init__(self, key, value): | |
| self.key = key | |
| self.value = value | |
| def __str__(self): | |
| return 'keys and values need to be passed as either list or tuple' + '\n' + \ | |
| ' {} is of type: '.format(self.key) + str(type(self.key)) + '\n' + \ | |
| ' {} is of type: '.format(self.value) + str(type(self.value)) | |
| class CustomIntFloatDict(dict): | |
| empty_dict = {} | |
| def __init__(self, key=None, value=None): | |
| if key is None or value is None: | |
| self.get_dict() | |
| elif not isinstance(key, (tuple, list,)) or not isinstance(value, (tuple, list)): | |
| raise KeyValueContructError(key, value) | |
| else: | |
| zipped = zip(key, value) | |
| for k, val in zipped: | |
| if not isinstance(val, (int, float)): | |
| raise IntFloatValueError(val) | |
| dict.__setitem__(self, k, val) | |
| def get_dict(self): | |
| return self.empty_dict | |
| def __setitem__(self, key, value): | |
| if not isinstance(value, (int, float)): | |
| raise IntFloatValueError(value) | |
| return dict.__setitem__(self, key, value) | |
| #testing | |
| # test_1 = CustomIntFloatDict() | |
| # print(test_1) | |
| # test_2 = CustomIntFloatDict({'a', 'b'}, [1, 2]) | |
| # print(test_2) | |
| # test_3 = CustomIntFloatDict(('x', 'y', 'z'), (10, 'twenty', 30)) | |
| # print(test_3) | |
| # test_4 = CustomIntFloatDict(('x', 'y', 'z'), (10, 20, 30)) | |
| # print(test_4) | |
| # test_4['r'] = 1.3 | |
| # print(test_4) | |
| # test_4['key'] = 'bad_value' |
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