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| class Tuple(tuple): | |
| def __getattr__(self, name): | |
| def _int(val): | |
| try: | |
| return int(val) | |
| except ValueError: | |
| return False | |
| if not name.startswith('_') or not _int(name[1:]): | |
| raise AttributeError("'tuple' object has no attribute '%s'" % name) | |
| index = _int(name[1:]) - 1 | |
| return self[index] | |
| t = Tuple(['z', 3, 'Python', -1]) | |
| print(t._1) # 'z' | |
| print(t._2) # 3 | |
| print(t._3) # 'Python' |
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| t = Tuple(['z', 3, 'Python', -1]) | |
| assert t._1 == 'z' | |
| assert t._2 == 3 | |
| assert t._3 == 'Python' | |
| assert t._4 == -1 |
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if not name.startswith('_') or not _int(name[1:])statement can be changed toif not name.startswith('_') or not _int(name[1:]) or len(self) < _int(name[1:])to make it more robust. Will help in avoiding IndexError: tuple index out of range