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python [2026/09/05 03:40] – carlpython [2026/09/09 19:44] (current) – carl
Line 71: Line 71:
 ==== Misc. APIs ==== ==== Misc. APIs ====
 List and Tuple types have an ''index'' method, but it throws if the element isn't present.   This forces you to use Exceptions as flow control. List and Tuple types have an ''index'' method, but it throws if the element isn't present.   This forces you to use Exceptions as flow control.
 +
 +''set()'' objects don't support the ''del'' keyword:
 +
 +    >>> s = set()
 +    >>> s.add(99)
 +    >>> del s[99]
 +    Traceback (most recent call last):
 +      File "<stdin>", line 1, in <module>
 +    TypeError: 'set' object doesn't support item deletion
 +
 +
 +''enumerate(iterable, start=0)''
 +
 +The ''start'' parameter doesn't do what I expect.   I would have expected it to start at the element listed, but instead it just adds start to the returned tuple index:
 +
 +    >>> for i, k in  enumerate([9, 8, 7], 1): print (i, k)
 +    ... 
 +    1 9
 +    2 8
 +    3 7
 +
 +I would have expected this to return 2 total elements instead:
 +
 +    ...
 +    1 8
 +    2 7
 + 
 +
  
python.1788579616.txt.gz · Last modified: by carl