Hello,
From a list of strings I want to delete all empty ones. This works:
while '' in keywords: keywords.remove('')
However, to a long-term C programmer this looks like an awkward way of
accomplishing a simple goal, because the list will have to be re-evaluated
in each iteration. Is
Robert Latest wrote:
From a list of strings I want to delete all empty ones. This works:
while '' in keywords: keywords.remove('')
However, to a long-term C programmer this looks like an awkward way of
accomplishing a simple goal, because the list will have to be re-evaluated
in each
Fredrik Lundh wrote:
creating a new list is always almost the right way to do things like
message = message.replace(always almost, almost always)
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Robert Latest [EMAIL PROTECTED] writes:
From a list of strings I want to delete all empty ones. This works:
while '' in keywords: keywords.remove('')
If you're looking for a quick (no quadratic behavior) and convenient
way to do it, you can do it like this:
keywords = [s for s in
Hrvoje Niksic [EMAIL PROTECTED] writes:
If you're looking for a quick (no quadratic behavior) and convenient
way to do it, you can do it like this:
keywords = [s for s in keywords if s != '']
It now occurred to me that a good compromise between convenience and
efficiency that retains the
Fredrik Lundh wrote:
keywords = filter(None, keywords) # get true items only
Makes seinse. BTW, where can I find all methods of the built-in types?
Section 3.6 only talks about strings and mentions the list append() method
only in an example. Am I too stupid to read the manual, or is this
Hrvoje Niksic wrote:
keywords[:] = (s for s in keywords if s)
Looks good but is so far beyond my own comprehension that I don't dare
include it in my code ;-)
robert
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Robert Latest:
Fredrik Lundh wrote:
keywords = filter(None, keywords) # get true items only
Makes seinse. BTW, where can I find all methods of the built-in types?
Section 3.6 only talks about strings and mentions the list append() method
only in an example. Am I too stupid to read the
Robert Latest [EMAIL PROTECTED] wrote:
Hrvoje Niksic wrote:
keywords[:] = (s for s in keywords if s)
Looks good but is so far beyond my own comprehension that I don't dare
include it in my code ;-)
:-) Worth understanding thought I think - here are some hints
keywords[:] = (s for
Nick Craig-Wood wrote:
Using keywords[:] stops the creation of another temporary list.
in CPython, list[:] = iter actually creates a temporary list object on
the inside, in case iter isn't already a list or a tuple.
(see the implementation of PySequence_Fast() for details).
/F
--
Robert Latest [EMAIL PROTECTED] wrote:
BTW, where can I find all methods of the built-in types?
Section 3.6 only talks about strings and mentions the list append() method
only in an example. Am I too stupid to read the manual, or is this an
omission?
3.6 talks about features common to all
Fredrik Lundh [EMAIL PROTECTED] wrote:
Nick Craig-Wood wrote:
Using keywords[:] stops the creation of another temporary list.
in CPython, list[:] = iter actually creates a temporary list object on
the inside, in case iter isn't already a list or a tuple.
(see the implementation of
Sion Arrowsmith wrote:
Robert Latest [EMAIL PROTECTED] wrote:
BTW, where can I find all methods of the built-in types?
Section 3.6 only talks about strings and mentions the list append() method
only in an example. Am I too stupid to read the manual, or is this an
omission?
3.6 talks about
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