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Python idiom to return first item or None
I'm sure there's a simpler way of doing this that's just not occurring to me.
23 Answers
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What's the difference between a Python module and a Python package?
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A module is a single file (or files) that are imported under one import and used.
e.g.
import my_module
A package is a collection of modules in directories that give a package hierarchy.
from my_package.timing.danger.internets import f...
What are 'closures' in .NET?
What is a closure ? Do we have them in .NET?
11 Answers
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How to find all positions of the maximum value in a list?
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>>> m = max(a)
>>> [i for i, j in enumerate(a) if j == m]
[9, 12]
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Upgrade python in a virtualenv
Is there a way to upgrade the version of python used in a virtualenv (e.g. if a bugfix release comes out)?
12 Answers
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What does the red exclamation point icon in Eclipse mean?
What does the red exclamation point icon in Eclipse mean? There are lots of different search results on the Internet about "red exclamation point icons" and "red exclamation mark decorators" and "red bang icons," no doubt because lots of plugins and programming-related tools use red exclamation poin...
Pipe to/from the clipboard in Bash script
Is it possible to pipe to/from the clipboard in Bash?
29 Answers
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Nesting await in Parallel.ForEach
In a metro app, I need to execute a number of WCF calls. There are a significant number of calls to be made, so I need to do them in a parallel loop. The problem is that the parallel loop exits before the WCF calls are all complete.
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What are the use cases of Graph-based Databases (http://neo4j.org/)? [closed]
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I used a graph database in a previous job. We weren't using neo4j, it was an in-house thing built on top of Berkeley DB, but it was similar. It was used in production (it still is).
The reason we used a graph database was that the data being stored...
“for line in…” results in UnicodeDecodeError: 'utf-8' codec can't decode byte
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As suggested by Mark Ransom, I found the right encoding for that problem. The encoding was "ISO-8859-1", so replacing open("u.item", encoding="utf-8") with open('u.item', encoding = "ISO-8859-1") will solve the problem.
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