blocks|key|444236|text|IPython捕获变量_(下划线)中最后一个命令的值(输出)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|444237|%25edit+some_variable|code-block|syntax|javascript|444238|将在编辑器中打开变量的值。|444239|因此，"%25edit+_“应使您能够编辑和保存最后一个命令的值。|444240|请参阅the+History+section+of+the+IPython+docs|offset|length|444241|要了解%25edit魔术函数的可能参数，请在ipython提示符下键入以下内容：|444242|%25edit?|444243|entityMap|0|LINK|mutability|MUTABLE|url|http://ipython.org/ipython-doc/rel-0.13.1/interactive/tutorial.html#history^0|0|0|0|0|3|13|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|13|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|14|8|@]|9|@$M|15|N|16|1|17]]|A|$]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

IPython captures the value (output) of the last command in the variable _ (underscore).

<pre><code>%edit some_variable
</code></pre>

will open the value of a variable in your editor.

So, "%edit _", should enable you to edit and save the value of the last command.

See <a href="http://ipython.org/ipython-doc/rel-0.13.1/interactive/tutorial.html#history" rel="nofollow">the History section of the IPython docs</a>

And to learn about the possible arguments to the %edit magic function, type the following at the ipython prompt:

<pre><code>%edit?
</code></pre>

blocks|key|226183|text|只需执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|226184|%25save+file_name.py+_oh[7]|code-block|syntax|javascript|226185|PS:其他一些有用的命令：|226186|%25save+file_name.py+_|226187|'_‘指的是之前的输出。|226188|或者，您可以：|226189|%25save+file_name.py+_oh[i]|226190|'i‘为输出历史编号，可通过以下方式首先查看输出：|226191|_oh|226192|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

Just do as follow:

<pre><code>%save file_name.py _oh[7]
</code></pre>

PS: Some additional useful command: 

<pre><code>%save file_name.py _
</code></pre>

'_' refers to the previous output. 

Or you can: 

<pre><code>%save file_name.py _oh[i]
</code></pre>

'i' refers to the output history number, you can see output first via: 

<pre><code>_oh
</code></pre>

blocks|key|444319|text|使用IPython神奇函数store|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|444320|%25store+foo+>a.txt+#+Store+(overwrite)+value+of+foo+to+file+a.txt

%25store+foo+>>a.txt+#+Append+value+of+foo+to+file+a.txt|code-block|syntax|javascript|444321|entityMap|0|LINK|mutability|MUTABLE|url|http://ipython.org/ipython-doc/rel-0.12/config/extensions/storemagic.html^0|D|5|D|5|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Use the IPython magic function <a href="http://ipython.org/ipython-doc/rel-0.12/config/extensions/storemagic.html" rel="noreferrer"><code>store</code></a>

<pre><code>%store foo &gt;a.txt # Store (overwrite) value of foo to file a.txt

%store foo &gt;&gt;a.txt # Append value of foo to file a.txt
</code></pre>

blocks|key|226262|text|如果需要的话，%25%25capture+cell+magic会保存运行命令的stdout/stderr输出。下面是用法语法：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|226263|%25%25capture+[--no-stderr]+[--no-stdout]+[--no-display]+[output]|code-block|syntax|javascript|226264|下面是一个使用示例：|226265|In+[1]:+%25%25capture+my_print_output
++++...:+print('test')
++++...:

In+[2]:+my_print_output
Out[2]:+<IPython.utils.capture.CapturedIO+at+0x7f2efa2c12d0>

In+[3]:+test_output.show()
test|226266|输出对象是IPython.utils.capture.CapturedIO的一个实例，它有一个简洁的接口，用于访问标准输出/标准错误或组合输出。|226267|entityMap|0|LINK|mutability|MUTABLE|url|http://ipython.readthedocs.io/en/stable/interactive/magics.html#cellmagic-capture|1|http://ipython.readthedocs.io/en/stable/api/generated/IPython.utils.capture.html#IPython.utils.capture.CapturedIO^0|7|9|7|K|0|0|0|0|0|5|W|5|W|1|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|17|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|19|8|@$9|1A|A|1B|B|C]]|D|@$9|1C|A|1D|1|1E]]|E|$]]|$1|Q|3|-4|5|6|7|1F|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]|Y|$5|T|U|V|E|$W|Z]]]]

The <a href="http://ipython.readthedocs.io/en/stable/interactive/magics.html#cellmagic-capture" rel="noreferrer"><code>%%capture</code> cell magic</a> saves the stdout/stderr output of running a command, if that's what you need. Here's the usage syntax:

<pre><code>%%capture [--no-stderr] [--no-stdout] [--no-display] [output]
</code></pre>

And, here's a usage example:

<pre><code>In [1]: %%capture my_print_output
 ...: print('test')
 ...:

In [2]: my_print_output
Out[2]: &lt;IPython.utils.capture.CapturedIO at 0x7f2efa2c12d0&gt;

In [3]: test_output.show()
test
</code></pre>

The output object is an instance of <a href="http://ipython.readthedocs.io/en/stable/api/generated/IPython.utils.capture.html#IPython.utils.capture.CapturedIO" rel="noreferrer"><code>IPython.utils.capture.CapturedIO</code></a>, which has a neat interface for accessing stdout/stderr or combined output.

I want to capture the output of the following ipython command into a file:
commands and outputs areas follows:

<pre><code>`decoder.get_hyp()`

WARNING: "ngram_search.c", line 1000: &lt;/s&gt; not found in last frame, using ++NOISE++ instead
INFO: ngram_search.c(1046): lattice start node &lt;s&gt;.0 end node ++NOISE++.171
INFO: ps_lattice.c(1225): Normalizer P(O) = alpha(++NOISE++:171:185) = -2003082
INFO: ps_lattice.c(1263): Joint P(O,S) = -2036704 P(S|O) = -33622
Out[7]: ('WELCOME TO MY TALK', '000000000', -36704586)
</code></pre>

I want to capture only the part "wellcome to my talk" into my file.

How to write the output of ipython command in python text file?

我希望将以下ipython命令的输出捕获到一个文件中:命令和输出区域如下：`decoder.get_hyp()`WARNING: "ngram_search.c", line 1000: </s> not found in last frame, using ++NOISE++ insteadINFO: ngram_s...

问如何在python文本文件中写入ipython命令的输出？
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问如何在python文本文件中写入ipython命令的输出？
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