lbillingham

class ChainableMeta(type):
    """this is in no way evil"""
    def __getattr__(cls, _):
        return Chainable()

class Chainable(object, metaclass=ChainableMeta):
    """
    Can we do loads of chained attribute lookups
      that always get to the same place?
    """

lbillingham

python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())"

lbillingham

Use ipython shell with Django

Ordinary Django shell

$ python manage.py shell

does not do autocompletion, doc pretty-printing or other nice-to-have-things.

A way around this is using the ipython shell. We'll assume that both django and ipython are installed (in an active virtualenv),

lbillingham

import requests

url_base = r'http://app.geomag.bgs.ac.uk/wdc/'
station_resource = 'stations'
stations_url = url_base + station_resource

response = requests.get(stations_url)

# dictionary with IAGA codes as primary keys
stations = response.json()

lbillingham

class Spam(object):
    """
    Demo of python class scope
    fails 
    on py 3.5    
    > `File "class_scope.py", line 20, in <listcomp>`
    > `...`
    > `NameError: name 'ham_gen_list' is not defined`
    
    on py 2.7

lbillingham

lbillingham

# hello.py
import click

@click.command()
@click.option(
    '--name', default='world',
    prompt='greet whom?',
    help='who should i greet?'
)
def main(name):

lbillingham

# -*- coding: utf-8 -*-
"""
Demo class to hold magnetic elements data.
Any keyword argument indexed by an ascii_uppercase letter
will become an attribute
"""
import doctest
import math
import string

lbillingham

import sys

try:
    from setuptools import setup
except ImportError:
    from distutils.core import setup
if 'develop' in sys.argv:
    requirements = [i.strip() for i in open("requirements_dev.txt").readlines()]
else:
    requirements = [i.strip() for i in open("requirements.txt").readlines()]

lbillingham

import inspect
import os
import subprocess
import unittest


class TestAThing(unittest.TestCase):
    def test_this_file_seen_by_ls(self):
        proc_ls = subprocess.Popen(['/bin/bash'],   
                                   stdin=subprocess.PIPE,