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Most concise way to check whether a list is empty or [None]?
I understand that I can test:
if MyList: pass
and:
if not MyList: pass
but what if the list has an item (or multiple items), but those item/s are None:
MyList = [None, None, None] if ???: pass...
Started by Phillip Oldham on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
If you are concerned with elements in the list which evaluate as true:
if mylist and filter(None, or it contains no true values"
If you want to strictly check for None , use filter(lambda x: x is not None, mylist) instead of filter....
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Is there a Python built-in datatype, besides None , for which:
>>> not foo > None True
where foo is a value of that type? How about Python 3?
Started by Attila Oláh on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
None < None....
Thus, expressions like 1 < '', 0 > None or len <= len are no longer valid, and e.g.
In Python 3, this was changed; now doing a meaningful natural ordering .
None is always less than any datatype in Python 2.
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Is there any clever in-built function or something that will return 1 for the min() example below? (I bet there is a solid reason for it not to return anything, but in my particular case I need it to disregard None values really bad!)
>>> max...
Started by c00kiemonster on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
None is being returned
>>> print min([None, 1,2]) None >>> None < 1 True
If you want to return 1 you have to filter the None away:
>>> L = [None, 1, 2] >>> min(x for x in....
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Jammerbirdi
Joined: 23 Sep 2004
Posts: 12504
Location: @jammerbirdi
Started by Genero36 on
, 12 posts
by 7 people.
Answer Snippets (Read the full thread at rebkell):
Man, I don't what.
Don't start none, won't be none."
That's what I always say about pasta.
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I need to replace my mk2 abf golf that a hit and run driver kindly wrote off.
As i am unsure of my insurance for the next year, and as i only have £1500 tp spend i think the 1.8t is off the cards.
i need something reliable, economical and generally cheap...
Started by paultownsend on
, 13 posts
by 6 people.
Answer Snippets (Read the full thread at com):
I know i would regret anything.
Im going 1.8t.
For the journey,but i was impressed none the less.
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I am trying to translate the following code
d = {} d[0] = None
into C++ with boost.python
boost::python::dict d; d[0] = ?None
How can I get a None object in boost.python?
ANSWER:
boost::python::dict d; d[0] = boost::python::object();
Started by Dzhelil Rufat on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
You could use:
d[0] = d.get(0)
d.get defaults to None if you don't specify a default value managing a reference to the Python None object..
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I have tried this
login_div.Style("display") = "none";
But it's not working.how can I set the display of the div to none through code behind, in aspx I have a div:
<div id="login_div" runat="server">
Started by sumit on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
I believe this should work:
login_div.Attributes.Add("style","display:none");
Style is a collection of name-value pairs so you would set it as:
login_div.Style["display"] = "none";
(Square brackets="display:none;">Content</....
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How is
<None Include="C:\foo.bar" />
different from
<Content Include="C:\foo.bar" />
?
Thanks
Started by Emmett on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
None - The file is not included in the project.
One difference is how they get published; "None" items don't get included in a publish, "Content on the build action property explains the differences.
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What is the benefit to put ol, ul { list-style: none; } in css reset . While we only keep list style none in Navigation. Due to keep this in content if we want normal style of "ordered list" and "unordered list" item then we need to define again. ok to...
Started by jitendra on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
I believe some browsers have ....
There might not be a benefit, if you're already at list-style: none;
Same benefit as the first (roman, greek, etc).
Put { list-style: none; } where you need it, most often.
I would say there is no benefit.
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What is the difference between overflow:hidden and display:none?
Answer Snippets (Read the full thread at stackoverflow):
If both are set....
Display: none not render it.
Let's say you have a div that measures 100 x 100px
You then put; then the text that fits into the 100x100 will not be displayed, and will not affect layout .
none says the element is not shown.
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