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DATABASES = {
    'default': {
        'ENGINE':'django.db.backends.mysql',
        ...
        'OPTIONS': {'charset': 'utf8mb4'},
    }
}

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from itertools import chain
from operator import attrgetter


# ascending oreder
result_list = sorted(
    chain(queryset1, queryset2),
    key=attrgetter('date_created'))
    
# descending order

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# install via MacPorts
sudo port install openssl
sudo env ARCHFLAGS="-arch x86_64" LDFLAGS="-L/opt/local/lib" CFLAGS="-I/opt/local/include" pip install cryptography

# install via Homebrew
brew install openssl
env ARCHFLAGS="-arch x86_64" LDFLAGS="-L/usr/local/opt/openssl/lib" CFLAGS="-I/usr/local/opt/openssl/include" pip install cryptography

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find . \( -name '*.py' -o -name '*.coffee' -o -name '*.scss' \) | xargs wc -l

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upstream php {
    server unix:/var/run/php5-fpm.sock;
}

server {
    # enforce NO www
    server_name www.example.com;
    return 301 $scheme://example.com$request_uri;
}

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from django.forms import ModelForm
from django.forms import ValidationError
from django.forms import FileField

# Django 1.6 Version

class BaseModelForm(ModelForm):

    # strip leading or trailing whitespace
    def _clean_fields(self):

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# round robin load balance pool
# servers can be local or remote
upstream lbpool {
    ip_hash;
    server  10.10.10.1:8000 max_fails=3 fail_timeout=120;
    server  10.10.10.2:8000 max_fails=3 fail_timeout=120;
    # additional servers
}

# http server

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# the following assumes a typical MacPorts install to /opt/local

# create a directory to hold local ports
sudo mkdir /opt/custom

# edit /opt/local/etc/macports/sources.conf and add the following line before rsync://rsync.macports.org/release/tarballs/ports.tar
# file:///opt/custom

# create the directories to hold the port file
sudo mkdir -p /opt/custom/databases/mysql56/files/

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upstream php-sendy-example-com {
    server unix:/var/run/php5-fpm.sock;
}

server {
    listen          80;
    server_name     sendy.example.com;
    root            /home/webapps/sendy.example.com/;
    access_log      /var/log/nginx/sendy.example.com.access.log  main;
    error_log       /var/log/nginx/sendy.example.com.error.log;

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server {
    listen          80;
    server_name     jira.example.com;
    access_log      /var/log/nginx/jira.example.com.access.log  main;
    error_log       /var/log/nginx/jira.example.com.error.log;

    location / {
        proxy_pass              http://localhost:8080;
        proxy_set_header        Host             $host;
        proxy_set_header        X-Real-IP        $remote_addr;