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How do I check whether a file exists without exceptions?
...open_it(), it's safer to use a try around the attempt to open it. Checking and then opening risks the file being deleted or moved or something between when you check and when you try to open it.
If you're not planning to open the file immediately, you can use os.path.isfile
Return True if path ...
Python unit test with base and sub class
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This method only works for setUp and tearDown methods if you reverse the order of the base classes. Because the methods are defined in unittest.TestCase, and they don't call super(), then any setUp and tearDown methods in CommonTests need to be first in the ...
How does IPython's magic %paste work?
I want to copy already indented Python code / whole functions and classes into IPython. Everytime I try the indentation is screwed up and I get following error message:
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Position absolute but relative to parent
I have two divs inside another div, and I want to position one child div to the top right of the parent div, and the other child div to the bottom of the parent div using css. Ie, I want to use absolute positioning with the two child divs, but position them relative to the parent div rather than the...
Check whether an input string contains a number in javascript
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Exactly what I needed. Thanks
– AndyH
Oct 18 '16 at 7:35
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Jade: Links inside a paragraph
...is is the start of the para] #[a(href="http://example.com") a link] #[span and this is the rest of the paragraph]
You can also do nested inline elements:
p: This is a #[a(href="#") link with a nested #[span element]]
sha...
How to read a file into a variable in shell?
I want to read a file and save it in variable, but I need to keep the variable and not just print out the file.
How can I do this? I have written this script but it isn't quite what I needed:
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Virtual member call in a constructor
...e initializers run in order from the most derived class to the base class, and then constructors run in order from the base class to the most derived class (see Eric Lippert's blog for details as to why this is).
Also in .NET objects do not change type as they are constructed, but start out as the ...
An “and” operator for an “if” statement in Bash
I'm trying to create a simple Bash script to check if the website is down and for some reason the "and" operator doesn't work:
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What is Weak Head Normal Form?
...es Weak Head Normal Form (WHNF) mean? What does Head Normal form (HNF) and Normal Form (NF) mean?
6 Answers
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