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Clear variable in python
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Open the python terminal and type print x and press enter. This will produce an interpreter error, as do most languages when you try to print an undefined variable. But if you define the variable, and then try to clear it with None, using the print ...
How to upgrade all Python packages with pip?
...finite potential variations for this. I'm trying to keep this answer short and simple, but please do suggest variations in the comments!
In older version of pip, you can use this instead:
pip freeze --local | grep -v '^\-e' | cut -d = -f 1 | xargs -n1 pip install -U
The grep is to skip editable...
深入浅出计算机字符集编码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的是JAVA编程，问题便很容易解决直接用destStr = new String(sourceStr.getByte(“UTF-8”), “EUC-JP”)就可以进行编码的转换，不过C++就没那么幸运了，除非按照一定的逻辑自行实现一套编码转换的方法，当然从各方面限制来看是不太现实...
socket.error: [Errno 48] Address already in use
...module before, it is most likely that process still bound to the port. Try and locate the other process first:
$ ps -fA | grep python
501 81651 12648 0 9:53PM ttys000 0:00.16 python -m SimpleHTTPServer
The command arguments are included, so you can spot the one running SimpleHTTPServer if...
What is the difference between quiet NaN and signaling NaN?
I have read about floating-point and I understand that NaN could result from operations. But I can't understand what these are concepts exactly. What is the difference between them?
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Jar Mismatch Found 2 versions of android-support-v4.jar in the dependency list
I am trying to create 2 versions of an Android app (free/paid). I have an Android Library that contains files common to both. I created a new Android project and am trying to use the Library but get the error below:
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Changing java platform on which netbeans runs
...tallation.
Modify the netbeans_jdkhome variable to point to new JDK path, and then
Restart your Netbeans.
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How do you access a website running on localhost from iPhone browser
I am working on a mobile website and would like to test it using my iPhone browser. My Windows 7 machine and iPhone are on the same wireless network. How do I access localhost from the iPhone? Right now I get a 404 error.
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Where is the WPF Numeric UpDown control?
...ically, I am looking for the Numeric UpDown control. Was there an out of band release that I missed? Really don't feel like writing my own control.
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Javascript Thousand Separator / string format [duplicate]
Is there any function in Javascript for formatting number and strings ?
15 Answers
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