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Manually raising (throwing) an exception in Python
How can I raise an exception in Python so that it can later be caught via an except block?
8 Answers
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Is it possible to break a long line to multiple lines in Python [duplicate]
Just like C, you can break a long line into multiple short lines. But in Python , if I do this, there will be an indent error... Is it possible?
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Why are Python lambdas useful? [closed]
I'm trying to figure out Python lambdas. Is lambda one of those "interesting" language items that in real life should be forgotten?
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How to save an image locally using Python whose URL address I already know?
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Python 2
Here is a more straightforward way if all you want to do is save it as a file:
import urllib
urllib.urlretrieve("http://www.digimouth.com/news/media/2011/09/google-logo.jpg", "local-filename.jpg")
The second argume...
Is there a way to create multiline comments in Python?
I have recently started studying Python , but I couldn't find how to implement multi-line comments. Most languages have block comment symbols like
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How to ignore deprecation warnings in Python
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From documentation of the warnings module:
#!/usr/bin/env python -W ignore::DeprecationWarning
If you're on Windows: pass -W ignore::DeprecationWarning as an argument to Python. Better though to resolve the issue, by casting to int.
(Note that in Python 3.2, deprecation warnings ...
Does Python support short-circuiting?
Does Python support short-circuiting in boolean expressions?
3 Answers
3
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Format floats with standard json module
I am using the standard json module in python 2.6 to serialize a list of floats. However, I'm getting results like this:
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Python - 'ascii' codec can't decode byte
... you have invoked it on a string object (because you don't have the u). So python has to convert the string to a unicode object first. So it does the equivalent of
"你好".decode().encode('utf-8')
But the decode fails because the string isn't valid ascii. That's why you get a complaint about not...
How do I make python wait for a pressed key?
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In Python 3 use input():
input("Press Enter to continue...")
In Python 2 use raw_input():
raw_input("Press Enter to continue...")
This only waits for the user to press enter though.
One might want to use msvcrt ((Win...