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Can I use __init__.py to define global variables?
I want to define a constant that should be available in all of the submodules of a package. I've thought that the best place would be in in the __init__.py file of the root package. But I don't know how to do this. Suppose I have a few subpackages and each with several modules. How can I access th...
Any difference between First Class Function and High Order Function
I'm wondering whether/what difference between First Class Function and High Order Function .
6 Answers
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Display open transactions in MySQL
...d commit or cancel them?
There is no open transaction, MySQL will rollback the transaction upon disconnect.
You cannot commit the transaction (IFAIK).
You display threads using
SHOW FULL PROCESSLIST
See: http://dev.mysql.com/doc/refman/5.1/en/thread-information.html
It will not help ...
Rails has_and_belongs_to_many migration
I have two models restaurant and user that I want to perform a has_and_belongs_to_many relationship.
4 Answers
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scala vs java, performance and memory? [closed]
I am keen to look into Scala, and have one basic question I cant seem to find an answer to:
in general, is there a difference in performance and usage of memory between Scala and Java?
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Why use Abstract Base Classes in Python?
Because I am used to the old ways of duck typing in Python, I fail to understand the need for ABC (abstract base classes). The help is good on how to use them.
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Simple logical operators in Bash
I have a couple of variables and I want to check the following condition (written out in words, then my failed attempt at bash scripting):
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How do I provide custom cast support for my class?
...o other types? For example, if I have my own implementation of managing a byte[] , and I want to let people cast my class to a byte[] , which will just return the private member, how would I do this?
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Getting individual colors from a color map in matplotlib
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You can do this with the code below, and the code in your question was actually very close to what you needed, all you have to do is call the cmap object you have.
import matplotlib
cmap = matplotlib.cm.get_cmap('Spectral')
rgba = cmap(0.5)
print(rgba)...
Single script to run in both Windows batch and Linux Bash?
Is it possible to write a single script file which executes in both Windows (treated as .bat) and Linux (via Bash)?
11 Answ...