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How to re-raise an exception in nested try/except blocks?
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132
As of Python 3 the traceback is stored in the exception, so a simple raise e will do the (most...
Are SVG parameters such as 'xmlns' and 'version' needed?
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217
All user agents (browsers) ignore the version attribute, so you can always drop that.
If you e...
What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function
...e keys are valid Python identifiers.
This works:
a = {'import': 'trade', 1: 7.8}
a = dict({'import': 'trade', 1: 7.8})
This won't work:
a = dict(import='trade', 1=7.8)
>> SyntaxError: invalid syntax ^
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How do I calculate square root in Python?
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10 Answers
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How to get Top 5 records in SqLite?
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edited Apr 17 '12 at 17:59
Tim Cooper
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Android - shadow on text?
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391
You should be able to add the style, like this (taken from source code for Ringdroid):
<st...
Javadoc: package.html or package-info.java
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1 Answer
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Linux command (like cat) to read a specified quantity of characters
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194
head works too:
head -c 100 file # returns the first 100 bytes in the file
..will extract ...
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("Bad grape") from exc
The caught exception (exc, a KeyError) ...
Why does one hot encoding improve machine learning performance?
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261
Many learning algorithms either learn a single weight per feature, or they use distances between...