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Creating and throwing new exception
...ow a general exception use the throw command followed by a string.
throw "Error trying to do a task"
When used inside a catch, you can provide additional information about what triggered the error
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Efficient evaluation of a function at every cell of a NumPy array
...ze(f) # or use a different name if you want to keep the original f
result_array = f(A) # if A is your Numpy array
It's probably better to specify an explicit output type directly when vectorizing:
f = np.vectorize(f, otypes=[np.float])
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Large, persistent DataFrame in pandas
...of 1000 rows.
df = pd.concat(tp, ignore_index=True) # df is DataFrame. If errors, do `list(tp)` instead of `tp`
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Django - limiting query results
...olution in the question doesn't work with Django 1.7 anymore and raises an error:
"Cannot reorder a query once a slice has been taken"
According to the documentation https://docs.djangoproject.com/en/dev/topics/db/queries/#limiting-querysets forcing the “step” parameter of Python slice syntax e...
Postgres: “ERROR: cached plan must not change result type”
... the PostgreSQL 8.3.7 server to my application.
Does anyone know what this error means and what I can do about it?
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Choose File Dialog [closed]
Does anyone know of a complete choose file dialog? Maybe one where you can filter out all files except for ones with specific extensions?
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How to update Ruby to 1.9.x on Mac?
...C package from: https://github.com/kennethreitz/osx-gcc-installer to avoid errors running "make".
Edit: As of Mavericks you can choose to install only the Xcode command line tools instead of the whole Xcode package, which comes with gcc and lots of other things you might need for building packages....
思维导图在快速阅读或是其它学习工作中的作用 - 创意 - 清泛网 - 专注C/C++...
...么，这使我们可以积极地倾听讲课者。关键知识点之间的连接线会引导您进行积极主动思考。快速系统的整合知识，可以为您的知识融会贯通创造了极其有利的条件。发展创造性思维和创新能力。发散思维是创新思维的核心。画...
Split string using a newline delimiter with Python
I need to delimit the string which has new line in it. How would I achieve it? Please refer below code.
5 Answers
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Where are environment variables stored in registry?
I need to access an environment variable remotely. To do this I think the best way is to read it from registry.
4 Answers...