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Using Python 3 in virtualenv
...vwrapper
Create a Python3 based virtual environment. Optionally enable --system-site-packages flag.
mkvirtualenv -p /usr/bin/python3 <venv-name>
Set into the virtual environment.
workon <venv-name>
Install other requirements using pip package manager.
pip install -r requirements...
How do you get the logical xor of two variables in Python?
... the ^ operator):
from operator import xor
xor(bool(a), bool(b)) # Note: converting to bools is essential
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Why '&&' and not '&'?
...if you translate true to 1 and false to 0, then do bitwise operation, then convert non-zero to true and zero to false; it happens that the result will be the same had you just used logical operator (check this for exercise).
Another important distinction is also that a logical operator is short-cir...
What is “lifting” in Haskell?
...lt;a>. It applies a->b to every element of the container effectively converting it into functor<b>. When only first argument is supplied, a->b, fmap waits for the functor<a>. That is, supplying a->b alone turns this element-level function into the function functor<a> -&...
Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet
This is the traceback on my windows system.
12 Answers
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How to convert a PNG image to a SVG? [closed]
How to convert a PNG image to a SVG?
15 Answers
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How do I convert a git repository to mercurial?
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The hg convert utility isn't on by default after installation. In order to set it as such add the following to your .hgrc file.
[extensions]
hgext.convert=
If you're using TortoiseHg on Windows then this file resides in your home...
MySQL, better to insert NULL or empty string?
...tching databases, is that Oracle does not support empty strings. They are converted to NULL automatically and you can't query for them using clauses like WHERE somefield = '' .
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How to convert an entire MySQL database characterset and collation to UTF-8?
How can I convert entire MySQL database character-set to UTF-8 and collation to UTF-8?
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Convert HashBytes to VarChar
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fn_varbintohexstr is not documented function. Use CONVERT(Char,@value,2)
– Cheburek
Nov 2 '11 at 11:55
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