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How to retrieve an element from a set without removing it?
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tl;dr
for first_item in muh_set: break remains the optimal approach in Python 3.x. Curse you, Guido.
y u do this
Welcome to yet another set of Python 3.x timings, extrapolated from wr.'s excellent Python 2.x-specific response. Unlike AChampion's equally helpful Python 3.x-specific response, th...
Faster s3 bucket duplication
... answered May 10 '14 at 5:55
python1981python1981
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In Python, when to use a Dictionary, List or Set?
..., if for some weird reason you couldn't import collections, or, in pre-2.7 Python as a collections.defaultdict(int), using the items as keys and the associated value as the count).
Checking for membership of a value in a set (or dict, for keys) is blazingly fast (taking about a constant, short time...
Which maven dependencies to include for spring 3.0?
...am kinda confused, what modules I have to define as dependencies in my pom.xml. I just want to use the core container functions (beans, core, context, el).
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Check if something is (not) in a list in Python
I have a list of tuples in Python , and I have a conditional where I want to take the branch ONLY if the tuple is not in the list (if it is in the list, then I don't want to take the if branch)
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Add a new item to a dictionary in Python [duplicate]
I want to add an item to an existing dictionary in Python. For example, this is my dictionary:
3 Answers
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What do ellipsis […] mean in a list?
I was playing around in python. I used the following code in IDLE:
6 Answers
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month name to month number and vice versa in python
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import calendar
{v: k for k,v in enumerate(calendar.month_abbr)}
Before Python (2.7+) you would do
dict((v,k) for k,v in enumerate(calendar.month_abbr))
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How do you remove duplicates from a list whilst preserving order?
Is there a built-in that removes duplicates from list in Python, whilst preserving order? I know that I can use a set to remove duplicates, but that destroys the original order. I also know that I can roll my own like this:
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How to make an immutable object in Python?
...ve never needed this, it just struck me that making an immutable object in Python could be slightly tricky. You can't just override __setattr__ , because then you can't even set attributes in the __init__ . Subclassing a tuple is a trick that works:
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