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See what process is using a file in Mac OS X
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lsof | grep myfilename worked for me. I've got a PDF file in my Trash that the system claims is in use. Weirdly lsof claims it's in use by Preview but Preview doesn't seem to be running (eg when I command-tab through the running apps) but Activity Monitor does show it to b...
Convert data.frame column format from character to factor
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R Reference card: http://cran.r-project.org/doc/contrib/Short-refcard.pdf
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Python: access class property from string [duplicate]
I have a class like the following:
4 Answers
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Convert all strings in a list to int
In Python, I want to convert all strings in a list to integers.
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Delete a dictionary item if the key exists [duplicate]
... This is called the eaiser to ask for forgiveness than permission (EAFP) Python style.
– akki
Jul 22 '16 at 16:55
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JAVA“无法启动该应用程序”的解决办法 - Python - 清泛IT社区，为创新赋能！
调用虚拟控制台时出现了如下的错误，“无法启动该应用程序”，如下：
是因为JAVA的安全设置问题，进入C:Program Files (x86)Javajre7in，打开javacpl.exe，将安全级别设置为“中”即可。
Python -> Blockly - 闲聊区 - 清泛IT社区，为创新赋能！
https://github.com/blockpy-edu/BlockMirror
在线例子：https://blockpy-edu.github.io/BlockMirror/docs/index.html
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https://blog.ouseful.info/2016/0 ... lockly-environment/
Blockly -> Py 在线运行
How do I check if a string is a number (float)?
...e best possible way to check if a string can be represented as a number in Python?
33 Answers
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