Creating a Twitter Bot II – Random Twits

 

Hello again, welcome back to this “tutorial” about creating a Twitter bot, if you missed first part, please read it here.

So, now that we can Twit, maybe we can do some interesting things with that.

Creating random Tweets

As I wrote in the last article, one problem of tweeting “Hello World” is that you can’t twit twice the same text. In the other hand, we want the program to run all the time, tweeting different things, so we will make our program twit every x seconds a random text.

First thing is to create a class that will have some common functionalities and in there create a method that will create random texts of x characters.

 

Even if the code is easy, here is a little explanation of how this works:

I have an array of characters that can be used for the text, and then a for from 0 to the number of desired characters it concatenates a string with new random character. In the end that string is returned.

Now that we have the functionality to send some random text, we can post tweets with a fixed delay. Here is one way to do that. Remember main file we have? Let’s work on that file and do something like this:

We need time library to make it post every x time. time.time() returns the time as a floating point number expressed in seconds since the epoch, in UTC. For more information about Time library look here. Next step is to make objects of class Common and Twitter and connect to our Twitter account.

Now that we are connected we enter in an infinite loop and say sleep x seconds (in the example I putted 30, but you can put what you want) and then post a random tweet of 140 characters calling the randomText method.

If you want the code, fork it, review it, do whatever you want just clone it from here

Next time we will do some changes to our profile, see who follows us, follow people, etc. so stay tuned!

 

Creating a Twitter Bot

In this series of articles I will be creating a Twitter bot in Python (because, maybe I said this before, but Python is THE language). Creating a basic bot is something really easy and at the end of this article we will have a basic bot posting tweets.

All the code up to date is in a public repository in github, so you can freely clone it from here

What we need:

  • Python (the glorious computer language) 3.X
  • Tweepy (there are other libraries, but, this one is great).
  • A Twitter account (that will be the bot’s account)
  • A Twitter app (I will explain this in the first point of the article).

Create a Twitter App

First of all you need a Twitter app, this is a way to tell Twitter guys that you will be using their API. To do that you need to go to developers link in Twitter, then search for “Manage my apps” and there you will see a “Create new App” button.

From there is just to complete a form with some basic data about the application you want to create:

  • Name of the application
  • Description
  • Website (a place where people can download, use or get info about the app).
  • Callback URL (optional, it depends if you will use it or not).

Once you save, you will have a access token, access secret token, consumer key and a secret key to access your account and do things with your bot.

Get Tweepy

Ok, now Twitter know we are going to do something with his API, so we need a library to easily access that API. We are going to use Tweepy for this tutorial but there are plenty of other libraries out there. Simply pip install it (you may need sudo on Linux)

pip install tweepy

Now we can start programming!

Basic coding

Now, lets open our favorite python (the almighty) IDE (in my case is Pycharm), and lets start

The first class I will like to create is the connector class, I will call it Twitter.py

Let me explain a little what we did here:

First I imported Tweepy so this class can use it (kind of obvious but I am here for all level of developers).

In the init part of the class I added the keys I get when I created the app in Twitter and two more variables for auth and the api manager.

The first method “connect” is self descriptive 🙂  it does the OAuth part, connecting to Twitter (if you want more info about OAuth please check this website) and sets the API manager for future use.

Now that we have this class (in future articles we will update this class, but for now it is a good start) we want to tweet something, so, lets create another class to do a main class to send a tweet (it is obvious that this will be updated as the project grows).

 

This works, but, second time you run it, it will not post your message because you cannot duplicate twits. But the idea of this first article was just to understand how you can twit something as a bot, from here you can do lots of things. For example you can do a loop to twit different things with some time in the middle.

Stay tuned, next time we will do lots of fun stuff with Tweepy!

Python Tutorial Chapter 1 -Hello World!-

python logo

 

As I said in one of my first posts, there are plenty of good reasons to program in Python and as I love this language, I will try to do tutorials, kind of  “from zero to hero”. I wish this tutorial makes you learn about Python.

 

What you will need for this tutorial:

  • Python 3
  • PyCharm (well, any other IDE will work, I just chose this one for this because I feel it is the best one).
  • Eager to learn

So, any comments, ideas, questions, whatever, just comment here or in the video I will answer.

 

P.S.: Notice that I don´t have any script for the videos, so when I press “record” I only have the idea of what I am going to talk, so I am not sure of what I am going to say at the beggining of the video.

Let’s program the Game Of Life

gol1

Ok, this is the first “coding post” of the blog and it is not in Python! You red my first post and thought that this blog was going to be about Python, and then, a programming post using JavaScript. Well… here you will see a lot of things in a lot of languages.

Note: You can grab lots of game of life algorithms in different languages for free from Rosetta Code.

In this post we will start with the game of life coding by doing the logic in javascript, so, next time we can start programming the html part with canvas.

 

So, lets get started: first lets create our gameOfLife.js file, the logic of the game:

For a good start, our 2 dimensional array will be 10×10 positions:

For now, all the positions will take a 0 or 1 in a random way:

Until we have some good way to see it, lets put the output in the console, so I was thinking in a simple function like this:

So, if we send the array there we should see our initial state.

And now let’s run this (for showing purpose I will run it with node, but any way to run your js is good):

gol1

Now, we have to change it in cycles so, we will enter in a new for and look for our 4 rules:

  1. Any live cell with fewer than two live neighbours dies, as if caused by under-population.
  2. Any live cell with two or three live neighbours lives on to the next generation.
  3. Any live cell with more than three live neighbours dies, as if by over-population.
  4. Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction.

To do so, we need a function to count the neighbours of a cell:

 

And, once you have the status you need a function to determine the status of the cell given the rules:

All these values will be put in a second auxiliar array (If I put them in the actual array the values of a cell will be calculated using the modified values, so, lets create a new function with an array that will receive the new values:

And at least, the loop with steps to make it work (for the example I will hardcode it to 5):

This is all for this post, in the next one, we will add the web part and star quitting all the hardcoding.

If you want the latest code of this project, you can clone it from github