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Representing graphs (data structure) in Python
How can one neatly represent a graph in Python ? (Starting from scratch i.e. no libraries!) What data structure (e.g. dicts/tuples/dict(tuples)) will be fast but also memory efficient? One must be able to do various graph operations on it.
As pointed out, the various graph representations...
What is the Python equivalent of Matlab's tic and toc functions?
What is the Python equivalent of Matlab's tic and toc functions ?
12 Answers
12
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Iterate a list as pair (current, next) in Python
I sometimes need to iterate a list in Python looking at the "current" element and the "next" element. I have, till now, done so with code like:
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致PHP路上的“年轻人” - PHP - 清泛IT社区，为创新赋能！
...的项目。类似与内部的CMS系统、CRM系统等等，业务繁琐、数据流混杂、耦合的模块较多，这类项目复杂繁琐，适合PHP新人快速熟悉业务、快速实现子环节功能，对接多个模块练就一身把多个数据源揉一起的能力。通过参与这些复...
__lt__ instead of __cmp__
Python 2.x has two ways to overload comparison operators, __cmp__ or the "rich comparison operators" such as __lt__ . The rich comparison overloads are said to be preferred, but why is this so?
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python numpy machine epsilon
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just to be 100% confident, the first one provides python "standard" precision of innate floats while the second one the precision of numpy's floats?
– Charlie Parker
Nov 1 '17 at 16:47
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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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When to use os.name, sys.platform, or platform.system?
As far as I know, Python has 3 ways of finding out what operating system is running on:
5 Answers
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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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Using %f with strftime() in Python to get microseconds
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Both support %z in Python 3 :-) here's datetime and then time
– adamnfish
Feb 13 '17 at 17:55
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