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Re-raise exception with a different type and message, preserving existing information
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Python 3 introduced exception chaining (as described in PEP 3134). This allows, when raising an exception, to cite an existing exception as the “cause”:
try:
frobnicate()
except KeyError as exc:
raise ValueError("...
How to “comment-out” (add comment) in a batch/cmd?
I have a batch file that runs several python scripts that do table modifications.
10 Answers
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Heavy usage of Python at Google [closed]
Google's heavy usage of Python, is it just a matter of taste or does it give them a competitive advantage?
4 Answers
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How to add a browser tab icon (favicon) for a website?
...If you add an RSS feed, revisit this page and regenerate the browserconfig.xml file. You will then have a cool live tile!
browserconfig.xml - Windows 8.1 - Has been added to the root of the site. This points to the tile images and tile background colour. It contains the following images:
m...
In Python, what is the difference between “.append()” and “+= []”?
...or your case the only difference is performance: append is twice as fast.
Python 3.0 (r30:67507, Dec 3 2008, 20:14:27) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import timeit
>>> timeit.Timer('s.append("somethi...
PhoneGap: Detect if running on desktop browser
...mple.java
Windows 8 - example/package.appxmanifest
BlackBerry - www/config.xml
WebOS - framework/appinfo.json
Bada - src/WebForm.cpp (line 56)
Window Phone 7 - No idea where (somebody still developing on that platform?!)
Finally, you can use it anywhere on your site, if it's running on PhoneGap or...
What does 'super' do in Python?
...super is one thing that allows greater flexibility for users of the code.
Python 2 versus 3
This works in Python 2 and 3:
super(Child, self).__init__()
This only works in Python 3:
super().__init__()
It works with no arguments by moving up in the stack frame and getting the first argument to...
How to load/edit/run/save text files (.py) into an IPython notebook cell?
I've recently moved over to using IPython notebooks as part of my workflow. However, I've not been successful in finding a way to import .py files into the individual cells of an open IPython notebook so that they can edited, run and then saved. Can this be done?
...
Database Design for Revisions?
...operly does not cost much in terms of a performance hit. You could use an xml schema and even indexes to get over possible performance problems. Your comment about parsing the xml is valid but you could easily create a view using xquery - which you can include in queries and join to. Something li...
Can comments be used in JSON?
...up languages such as DocBook.",
"GlossSeeAlso": ["GML", "XML"]
},
"GlossSee": "markup"
}
}
}
}
}
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