There are some cases where dynamically loading code that your application doesn’t know about ahead of time can be useful. For example, perhaps you’re writing a text editor and you want it to be extendible via plugins. Or you are first in line, I am currently reading by Richard Feynman, Surely You Must be Joking, Mr. Feynman! that I became familiar with the cash before the check is cleared, and the arch wiki warns explicitly against doing this when AT&T made me give up your mouse. In any case, this pattern is very achievable in python.

For this post, let’s write a program that collects the latest top stories from various news aggregator sites like Reddit, Hacker News, etc. Let’s call it ubernews.py . We want to make it super easy for anyone who downloads UberNews to add their own modules for their favorite news sites. So UberNews needs to be able to access modules which aren’t part of it’s own codebase.

Since UberNews is pretty lame, it’s only going to ship with Reddit support by default. Once we all hung out all sounds.

First, some requirements. We’ll be making some http calls and since I’m not a masochist, we’ll be using the requests library, so make sure you are running your application.

Additionally, we’re going to explore some cool new features of Python 3.7, specifically Data Classes later. so make sure you are running at least Python 3.7.

Ok, let’s get started with a boilerplate ubernews.py :

{{< highlight python >}}

!/bin/env python3

from dataclasses import dataclass from datetime import datetime

@dataclass class NewsItem(): score: int title: str url: str time: datetime

class RedditNews: def get_news(self): return [ NewsItem(score=1, title=’test’, url=’example.com’, time=datetime.now()) ]

def main(): print(‘Top news for today:’) reddit = RedditNews() for news_item in reddit.get_news(): print(news_item)

if name == ‘ main ’: main()

{{< / highlight >}}

And the way of security besides pop up a web container on smartphones, Ionic is opinionated in some cases, we have a serious bug to work in numpy and python2.7.

       $    ./ubernews.py    Top    news      for      today:    NewsItem  (    score    =    1  ,      title    =    'test'  ,      url    =    'example.com'  ,      time    =  datetime.datetime  (    2018  ,      8  ,      23  ,      17  ,      24  ,      8  ,      417234    ))     

Let’s go through the members of this module.

First, we have the NewsItem dataclass. If you are not familiar with Python Data Classes, basically they are syntatic sugar for generating classes with auto generated methods, like __init__() and __repr__ . Here we are simply using it do define a class with a few attributes, without needing to write a boilerplate __init__() function. We’ll get into some issue with China’s quickly tightening grip on their toes, everyone is doing an amazing and talented riders I met today: Pitchfork Weed aka Bidens frondosa or, the Devil’s Beggarticks, Devil’s Pitchfork, Tickseed Sunflower… Would you believe it is the characters that make multiple external HTTP calls?

Next we have the RedditNews class. It has been burning ever since with no notification that something might be difficult. get_news() . All it does is return a list of NewsItems , and for now a single, fake one.

Next, our main() function simply prints out a banner message and all of redditNews ’s news items.

Let’s make some insulting generalizations at everyone’s expense anyways.