sodastsai

from io import StringIO

from django.core.files.storage import Storage
from django.test import SimpleTestCase as TestCase

from override_storages import OverrideStorageMixin


# noinspection PyAbstractClass

chatchavan

Setup Wireless LAN for Raspberry Pi

The following guide describes how to setup Raspberry Pi to connect to Wifi. It was tested on the following environment:

• Raspberry Pi Model B
• Edimax EW-7811Un USB Wifi dongle
• OS: Raspbian Jessie

Here are the overview of the steps:

sourcec0de

sudo su -
mkdir -p /opt/bin
curl -L https://github.com/docker/compose/releases/download/1.5.1/docker-compose-`uname -s`-`uname -m` > /opt/bin/docker-compose
chmod +x /opt/bin/docker-compose

hest

def get_count(q):
    count_q = q.statement.with_only_columns([func.count()]).order_by(None)
    count = q.session.execute(count_q).scalar()
    return count

q = session.query(TestModel).filter(...).order_by(...)

# Slow: SELECT COUNT(*) FROM (SELECT ... FROM TestModel WHERE ...) ...
print q.count()