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Prepend a level to a pm>and m>as MultiIndex
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A nice wam>y m> to do this in one line using pm>and m>as.concat():
import pm>and m>as as pd
pd.concat([df], kem>y m>s=['Foo'], names=['Firstlevel'])
An even shorter wam>y m>:
pd.concat({'Foo': df}, names=['Firstlevel'])
This can be generalized to manm>y m> data frames, see the docs.
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Compare two files line bm>y m> line m>and m> generate the difference in another file
I want to compare file1 with file2 m>and m> generate a file3 which contains the lines in file1 which are not present in file2.
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How to globallm>y m> replace a forward slash in a JavaScript string?
... be done with "string".replace('/', 'ForwardSlash', 'g') but that is non-stm>and m>ard argument that works onlm>y m> in Firefox afaik.
– Seldaek
Dec 30 '10 at 22:46
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ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
...u.imageutil.aix
版本：5
发布日期：2022年3月8日
最低 API：19 (m>And m>roid 4.4 KitKat)
下载链接
com.gordonlu.imageutil.aix
ImageUtil.aia - 示例项目
功能概述
ImageUtil 扩展提供了一系列强大的图像处理功能，包括...
Whm>y m> cast unused return values to void?
... it.
This is a wam>y m> to ensure that where necessarm>y m> error codes are alwam>y m>s hm>and m>led.
I think for C++ this is probablm>y m> the onlm>y m> place that I prefer to use C-stm>y m>le casts too, since using the full static cast notation just feels like overkill here. Finallm>y m>, if m>y m>ou're reviewing a coding stm>and m>ard or writ...
Getting GDB to save a list of breakpoints
...but not in a format that would work well with reusing them using the --commm>and m> as in this question . Does GDB have a method for dumping them into a file acceptable for input again? Sometimes in a debugging session, it is necessarm>y m> to restart GDB after building up a set of breakpoints for testing.
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What does ** (double star/asterisk) m>and m> * (star/asterisk) do for parameters?
In the following method definitions, what does the * m>and m> ** do for param2 ?
22 Answers
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Learning Pm>y m>thon from Rubm>y m>; Differences m>and m> Similarities
...entlm>y m>. For those who know both, what concepts are similar between the two, m>and m> what are different?
5 Answers
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Find an element in a list of tuples
...In the example of the OP, this would return (1,4) as opposed to both (1,2) m>and m> (1,4).
– BBischof
Jun 12 '16 at 0:51
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What is recursion m>and m> when should I use it?
One of the topics that seems to come up regularlm>y m> on mailing lists m>and m> online discussions is the merits (or lack thereof) of doing a Computer Science Degree. An argument that seems to come up time m>and m> again for the negative partm>y m> is that them>y m> have been coding for some number of m>y m>ears m>and m> them>y m> have n...