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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...dint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loop
In [8]: %timeit pd.Series(df.A.values,index=df.B).to_dict()
1000 loops, best of 3: 987 us per loop
...
记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...建议我检查一下是不是索引不佳所致，死马当活马医，我激活了Profiler记录慢操作：
mongo> use <DB>
mongo> db.setProfilingLevel(1);
不过结果显示基本都是insert操作（因为我是导入数据为主），本身就不需要索引：
mongo> use <DB>
mongo> ...
How to download a Nuget package without nuget.exe or Visual Studio extension?
...As I understand I will be able to extract the .dll files from it (with 7-zip) to use as normal.
6 Answers
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Notepad++ htmltidy - unable to find libtidy.dll
...d in earlier versions. See post here.
The solution is to download the 5.9 ZIP file from here, then copy the plugins\config folder to the Notepad++\plugins folder.
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How to perform better document version control on Excel files and SQL schema files
...sions.
The same is true for .xlsx if you decompress them. .xlsx files are zipped up directories of XML files (See How to properly assemble a valid xlsx file from its internal sub-components?). Git will view them as binary unless decompressed. It is possible to unzip the .xlsx and track the changes ...
How do I resolve configuration errors with Nant 0.91?
...he problem was Windows 7 security related in that the downloaded NAnt 0.91 zip file needed additional security related configuration to be performed: before extracting, one must right click on the zip file, select Properties and under the General tab, click the button labelled Unblock, then click OK...
Downloading a Google font and setting up an offline site that uses it
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one-liner, run in the target directory: curl -o f.zip "https://google-webfonts-helper.herokuapp.com/api/fonts/roboto?download=zip&subsets=latin,latin-ext&variants=regular,700" && unzip f.zip && rm f.zip
– smnbbrv
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大数据：用数据指导APP运营 - 资讯 - 清泛网 - 专注C/C++及内核技术
...的产生内容数）
4）分享出去的UGC带来的回流新装机、新激活用户数
等等。
而我们需要注意的是，这些关注的数据点，并不是一成不变的，它会因为产品的不同阶段而调整，如果我们假设未来足记有盈利模式，那么它关注的...
Python: Select subset from list based on index set
...uld just use list comprehension:
property_asel = [val for is_good, val in zip(good_objects, property_a) if is_good]
or
property_asel = [property_a[i] for i in good_indices]
The latter one is faster because there are fewer good_indices than the length of property_a, assuming good_indices are pr...
Can I install Python windows packages into virtualenvs?
... like binary installers for Windows made with distutils combine .exe with .zip into one .exe file. Change extension to .zip to see it's a valid zip file. I discovered this after reading answers to my question Where can I download binary eggs with psycopg2 for Windows?
UPDATE
As noted by Tritium21 ...