Hi everybody,
I have a question about the difference of behavior of "len" when applied on
tuples or on lists. I mean:
$ len( ( 'foo', 'bar' ) )
2
$ len( ( 'foo' ) )
3
$ len( [ 'foo', 'bar' ] )
2
$ len( [ 'foo' ] )
1
Why this behavior for the length computation of a tuple?
For my application, I prefer the behavior of length for a list. If I want to
store some values in a tuple because they should not be modified, the case
where the tuple contains only one element bothers me.
Thanks
Julien
--
python -c "print ''.join([chr(154 - ord(c)) for c in '*9(9&(18%.9&1+ ,\'Z
(55l4('])"
"When a distinguished but elderly scientist states that something is
possible, he is almost certainly right. When he states that something is
impossible, he is very probably wrong." (first law of AC Clarke)
Nov 3 '08
10 1512
>>For making a literal tuple, parentheses are irrelevant; only the
>>commas matter:
I don't think I'd go so far as to say that the parentheses around tuples are *irrelevant*... maybe just relevant in select contexts
> >>def foo(*args):
... for i, arg in enumerate(args) : ... print i, arg ...
> >>foo(1,2)
0 1 1 2
> >>foo((1,2)) # these parens are pretty important :)
0 (1, 2)
pedantically-grinning-ducktyping-and-running-ly yers,
I'll see your pedantry and raise you one:
>>foo()
>>foo(())
0 ()
And just because another "tuples without parens" case exists:
>>foo(,)
File "<stdin>", line 1
foo(,)
^
SyntaxError: invalid syntax
To maintain the poker theme, I'd say "You raised, and I call" but
my call fails :-P
-tkc This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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Hi,
Why is that a tuple doesnt have the methods 'count' and 'index'? It
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I realise its easy enough to convert the tuple to a list and do this,
I'm just curious why it is neccesary..
Thanks,
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by: richard |
last post by:
bonjour
je me connecte à une base de données interbase/firebird en utilisant,
KinterbasDB
http://kinterbasdb.sourceforge.net/ pour ceux que ca interesse
mais je pense que le probleme est le meme quel que soit la bdd
j'aimerais acceder a un champs par sont nom plutot que par son index
dans le record en cours, comme je fais maintenent
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Thanks-in-Advance
Steve
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>>>type()
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Why doesn't the tuple type have an index method? It seems such a
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Nick Maclaren.
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Hi,
I'm not in the mailing list.
By Googling, I stepped into this an old post: (Thu Feb 14 20:40:08 CET 2002)
of Jeff Shannon:
http://mail.python.org/pipermail/python-list/2002-February/128438.html
<<<
def SortOnItem(mylist, index):
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