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Apply multiple functions to multiple groupby columns
...t, it's just a much-more-detailed comment on Ted's answer, plus code/data. Python/pandas is not my first/best, but I found this to read well:
df.groupby('group') \
.apply(lambda x: pd.Series({
'a_sum' : x['a'].sum(),
'a_max' : x['a'].max(),
'b_mean' : x['b'].mea...
What are the advantages of using a schema-free database like MongoDB compared to a relational databa
...document-based data model. The basic unit of storage is analogous to JSON, Python dictionaries, Ruby hashes, etc. This is a rich data structure capable of holding arrays and other documents. This means you can often represent in a single entity a construct that would require several tables to proper...
How do BitTorrent magnet links work?
...nfo hash is the sha1 hash of the bencoded info block of the torrent.
This python code demonstrates how it can be calculated.
I wrote a (very naive) C# implementation to test this out since I didn't have a bencoder on hand and it matches what is expected from the client.
static string CalculateInf...
Applying .gitignore to committed files
...situation, thank you! fixed removing lots of files I accidently added to a Python repo
– Dmitry Lyalin
Jul 21 at 22:58
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What does middleware and app.use actually mean in Expressjs?
...note. No other answer mentions this. For a beginner who has worked only on python this is extremely important as these things might have never been encountered.
– Dheeraj M Pai
Dec 29 '19 at 22:12
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Am I immoral for using a variable name that differs from its type only by case?
...at's why there is the convention that types start with uppercase letter in Python.
– ilya n.
Sep 26 '09 at 16:12
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What's NSLocalizedString equivalent in Swift?
...marmelroy/Localize-Swift. Problem of genstrings is also resolved by custom python script included by the author. I am not an author.
– Tomek Cejner
Apr 30 '16 at 15:01
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Underscore prefix for property and method names in JavaScript
...the underscore prefix in JavaScript only a convention, like for example in Python private class methods are?
6 Answers
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rails + MySQL on OSX: Library not loaded: libmysqlclient.18.dylib
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For any python users getting here, pip uninstall mysqlclient and pip install mysqlclient also worked.
– Peter Dolan
Sep 13 '18 at 21:03
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How do I modify the URL without reloading the page?
...rk on file:/// for safety reasons, e.g. Firefox 30. Test on localhost with python -m SimpleHTTPServer.
– Ciro Santilli 郝海东冠状病六四事件法轮功
Jul 9 '14 at 16:05
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