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Pandas - How to flatten a hierarchical index in columns
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And if you want to retain any of the aggregation info from the second level of the multiindex you can try this:
In [1]: new_cols = [''.join(t) for t in df.columns]
Out[1]:
['USAF',
'WBAN',
'day',
'month',
's_CDsum',
's_CLsum',
's_CNTsum',
's_PCsum',
'tempfamax',
'...
How do I install pip on macOS or OS X?
... 13] Permission denied: '/Library/Python/2.7/site-packages/pip-19.1.1.dist-info/RECORD' Consider using the --user option or check the permissions.
– Jonas
May 23 '19 at 8:20
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Redirecting EC2 Elastic Load Balancer from HTTP to HTTPS
...seful to know its easier now. But this would be a better answer with more info about what to configure instead of just a link.
– John Rees
Aug 7 '18 at 20:20
1
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Why use multiple columns as primary keys (composite primary key)
... 1) the "great primary key debate" link is particularly stupid, the info is self-serving and false. 2) The index on the columns that make the row unique cannot be avoided. A "surrogate" ID with an index is always an additional column and an additional index. Rather silly because it is redund...
How can I find script's directory with Python? [duplicate]
...urrently executing (top-of-stack) script: "x.py". It doesn't
give any path info. It's the "os.path.realpath" call that does the real work.
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Show current assembly instruction in GDB
...an switch to assembly layout in GDB:
(gdb) layout asm
See here for more information. The current assembly instruction will be shown in assembler window.
┌─────────────────────────────────────────────...
Use of alloc init instead of new
...? (Note: I'm not trying to be condescending; I would just like to get more info, and know if following Apple's lead is sometimes a bad idea.)
– Senseful
Oct 11 '13 at 21:36
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When and why JPA entities should implement Serializable interface?
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This answer is just an info dump and doesn't at all help someone understand why.
– chrips
Oct 21 '19 at 17:27
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How to Sign an Already Compiled Apk
...y-release-key.keystore my_application.apk alias_name
check here for more info
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Filtering for empty or NULL names in a queryset
...ame.objects.exclude(Q(alias__isnull=True) | Q(alias__exact=''))
For more info see this page and this page in the Django docs.
As an aside: My SQL examples are just an analogy--the actual generated SQL code will probably look different. You'll get a deeper understanding of how Django queries work ...