adii1823
35 lines
732 B
Python
35 lines
732 B
Python
# namedtuple.py
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# the problem
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>>> vision = (9.5, 8.8)
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>>> vision
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(9.5, 8.8)
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>>> vision[0] # left eye (implicit positional reference)
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9.5
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>>> vision[1] # right eye (implicit positional reference)
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8.8
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# the solution
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>>> from collections import namedtuple
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>>> Vision = namedtuple('Vision', ['left', 'right'])
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>>> vision = Vision(9.5, 8.8)
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>>> vision[0]
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9.5
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>>> vision.left # same as vision[0], but explicit
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9.5
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>>> vision.right # same as vision[1], but explicit
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8.8
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# the change
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>>> Vision = namedtuple('Vision', ['left', 'combined', 'right'])
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>>> vision = Vision(9.5, 9.2, 8.8)
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>>> vision.left # still correct
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9.5
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>>> vision.right # still correct (though now is vision[2])
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8.8
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>>> vision.combined # the new vision[1]
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9.2
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