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python pandas: Remove duplicates by columns A, keeping the row with the highest value in column B
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1 1 20
3 2 40
4 3 10
You can do also something like:
In [12]: df.groupby('A', group_keys=False).apply(lambda x: x.loc[x.B.idxmax()])
Out[12]:
A B
A
1 1 20
2 2 40
3 3 10
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List all developers on a project in Git
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(users that have done commits)
Note: by default git shortlog groups commits by authors.
If you need to group them by committers, you will need Git 2.12 (Q1 2017)
git shortlog -snc
See commit 03f4082 (16 Dec 2016) by Jeff King (peff).
See commit fbfda15 (11 Oct 2016) by Linus Torval...
MySQL - Get row number on select
...ECT @rank:=@rank+1 AS rank, itemID, COUNT(*) as ordercount
FROM orders
GROUP BY itemID
ORDER BY ordercount DESC;
SELECT @rank;
The last select is your count.
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How do I find duplicates across multiple columns?
...tuff] s
join (
select name, city, count(*) as qty
from [stuff]
group by name, city
having count(*) > 1
) t on s.name = t.name and s.city = t.city
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mysql update column with value from another table
... ON registrations.id = participants_registrations.registrationId LEFT JOIN groups ON (groups.id = registrations.groupId) SET registrations.groupId = groups.id, registrations.groupName = groups.name, participants.memberOfGroupName = groups.name
– Great Sphinx
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How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
...ER JOIN
(SELECT home, MAX(datetime) AS MaxDateTime
FROM topten
GROUP BY home) groupedtt
ON tt.home = groupedtt.home
AND tt.datetime = groupedtt.MaxDateTime
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python pandas remove duplicate columns
...ge DataFrames. Here is an alternative:
def duplicate_columns(frame):
groups = frame.columns.to_series().groupby(frame.dtypes).groups
dups = []
for t, v in groups.items():
dcols = frame[v].to_dict(orient="list")
vs = dcols.values()
ks = dcols.keys()
lvs ...
How to deal with page breaks when printing a large HTML table
...eak-inside:avoid; page-break-after:auto }
thead { display:table-header-group }
tfoot { display:table-footer-group }
</style>
</head>
<body>
<table>
<thead>
<tr><th>heading</th></tr>
</thead>
&...
Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
...'.
First I ran sudo service mongodb stop.
Then I used ls -la to see what group & owner mongodb assigned to /var/lib/mongodb (existing path) and I changed the /data/db (new path) with chown and chgrp to match. (example: sudo chown -R mongodb:mongodb /data/db)
Then I updated the path in etc/mong...
Load resources from relative path using local html in uiwebview
... folder named www from my finder window), you will get two options "create groups for any added folders" and "create folders references for any added folders".
Select the "create folder references.." option.
Use the below given code. It should work like a charm.
NSURL *url = [NSURL fileURLWithPat...