Message369017
In the tutorial for lambda expressions at https://docs.python.org/3.7/tutorial/controlflow.html#lambda-expressions the reserved word pair is introduced without noting that it is a reserved word. In the example given, I wasn't sure whether pair was a reserved word or whether the interpreter was parsing the plural "pairs" which is presumable an arbitrary name.
Actual content:
The above example uses a lambda expression to return a function. Another use is to pass a small function as an argument:
>>> pairs = [(1, 'one'), (2, 'two'), (3, 'three'), (4, 'four')]
>>> pairs.sort(key=lambda pair: pair[1])
>>> pairs
[(4, 'four'), (1, 'one'), (3, 'three'), (2, 'two')]
Candidate expected content:
The above example uses a lambda expression to return a function. Another use is to pass a small function as an argument, for example, the reserved word pair to designate the position in a tuple pair:
>>> items = [(1, 'one'), (2, 'two'), (3, 'three'), (4, 'four')]
>>> items.sort(key=lambda pair: pair[1])
>>> items
[(4, 'four'), (1, 'one'), (3, 'three'), (2, 'two')] |
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Date |
User |
Action |
Args |
2020-05-16 06:57:50 | Chas Belov | set | recipients:
+ Chas Belov, docs@python |
2020-05-16 06:57:50 | Chas Belov | set | messageid: <1589612270.24.0.155728110455.issue40641@roundup.psfhosted.org> |
2020-05-16 06:57:50 | Chas Belov | link | issue40641 messages |
2020-05-16 06:57:50 | Chas Belov | create | |
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