大约有 47,000 项符合查询结果（耗时：0.0596秒） [XML]
Python group by
...8544'], 'type': 'NOT'}]
Note both of these do not respect the original order of the keys. You need an OrderedDict if you need to keep the order.
>>> from collections import OrderedDict
>>> res = OrderedDict()
>>> for v, k in input:
... if k in res: res[k].append(v)
...
MySQL Results as comma separated list
...----------------------------------------+
GROUP_CONCAT with DISTINCT and ORDER BY
SELECT GROUP_CONCAT(DISTINCT TaskName ORDER BY TaskName DESC)
FROM Tasks;
Result:
+--------------------------------------------------------+
| GROUP_CONCAT(DISTINCT TaskName ORDER BY TaskName DESC) |
+----------...
Calculate difference in keys contained in two Python dictionaries
...t[4]['b'][2]": {'newvalue': 2, 'oldvalue': 3}}}
List difference ignoring order or duplicates: (with the same dictionaries as above)
>>> t1 = {1:1, 2:2, 3:3, 4:{"a":"hello", "b":[1, 2, 3]}}
>>> t2 = {1:1, 2:2, 3:3, 4:{"a":"hello", "b":[1, 3, 2, 3]}}
>>> ddiff = DeepDiff(...
Is “else if” faster than “switch() case”? [duplicate]
...
True, but with an if-else-if chain you can order the conditions based on how likely they are to be true.
– Dave Van den Eynde
Apr 20 '09 at 11:24
76...
Difference between an application server and a servlet container?
...difference between a full fledged application server (e.g. Weblogic, JBoss etc.) and a servlet container (Tomcat, Jetty etc.).
...
How to create a file in memory for user to download, but not through server?
.... If you have a text or CSV file, start the string with '\ufeff', the Byte Order Mark for UTF-16BE, and text editors will be able to read non-ASCII characters correctly.
– larspars
Nov 19 '14 at 9:06
...
What is the difference between display: inline and display: inline-block?
...div>. If you give the <span> element a height of 100px and a red border for example, it will look like this with
display: inline
display: inline-block
display: block
Code: http://jsfiddle.net/Mta2b/
Elements with display:inline-block are like display:inline elements, but they can...
pandas GroupBy columns with NaN (missing) values
...
while group_id in df.columns:
group_id += 'x'
# get final order of columns
agg_col_order = (group_cols + list(agg_dict.keys()))
# create unique index of grouped values
group_idx = df[group_cols].drop_duplicates()
group_idx[group_id] = np.arange(group_idx.shape[0])
...
HTML5 Canvas Resize (Downscale) Image High Quality?
...n of the input pixels is right inside a destination pixels, overlaps an X border, an Y border, or both.
( A scheme would be nice here, but i don't have one. )
Here's an example of canvas scale vs my pixel perfect scale on a 1/3 scale of a zombat.
Notice that the picture might get scaled in your ...
How can I push a specific commit to a remote, and not previous commits?
...without pushing previous commits, you should first use git rebase -i to re-order the commits.
share
|
improve this answer
|
follow
|
...