No much introduction. I'm a bit free so I decided to do this tutorial before I get busy again. Hope someone learns something from this tutorial.

The tutorial is about web programming in python using a micro web framework called bottle. Python bottle is a minimalistic and fast web framework used for developing simple REST services. However, nothing stops you from developing a full-fledged web application with python bottle. One good thing, or maybe a con, of bottle is its single file approach. Bottle is a single python file that requires no external library order than the python standard library. However, this approach makes it a bit difficult to integrate it with other modules, but this can be solved by building your web application with object-orientation in mind from scratch.

REQUIREMENTS:

1) Python 3.4 +

2) Bottle web framework (pip install bottle) with internet connection.

3) Web server (optional). Bottle can run with python's standard wsgiref server bundled with python. However, we need a faster web server that will make our development easier. Popular wsgi-based web servers for python are cherrypy, rocket, twisted, tornado, gunicorn, paste, etc. Since we're just using it for development, our best bet would be python paste or cherrypy. I'll use paste (pip install paste) and that's it!

4) text editor. Any good text editor is okay by me, except notepad. Well, I use notepad++

That is all we need for now. Let's get started!

Thank you, the section will be a little bit revived.
Following.

CC dhtml18 silento pcguru1 BinaryMonk and co

Following

adepeter2027:
Following

did you study comp sci?

edicied:

did you study comp sci?

Nope but good in programming. I love coding.

I'm a med lab scientist

interested

adepeter2027:

Nope but good in programming. I love coding.

I'm a med lab scientist

wow nice everyone should learn how to code

edicied:

wow nice everyone should learn how to code

But you know this state-of-the-art yours is impossible.

Not everybody loves CMP related stuffs.

Abeg, make i no derail this thread.

Op, apologies

Now let us do the needful in programming, that is, creating the mandatory hello world app in bottle.

First open a text editor and create a python file called lesson.py, and save it in a folder under your C: \ drive, called BottleApp (make sure its created, if not then create it too).

Next, edit the lesson.py with the following source code:

#!usr/bin/env python

from bottle import Bottle, route, run

app = Bottle( )

@app.route( " / " )

def index( ):
    return "Hello, World!" # this is comment. use four spaces to indent

if __name__ == '__main__':
    app.run(
         host = '0.0.0.0',
         port = 8080,
         server = 'paste'
     )

Now save it. Open a command prompt or unix shell, navigate to where you saved the file, i.e,

cd C: \BottleApp

Type the following on the command prompt:

python -m lesson

Hit enter. Open a web browser and navigate to 127.0.0.1:8080/

You will see your app running...

Checking time

let us use python's datetime library to know the time. This will demonstrate how to use string interpolation in python. But before then, let me introduce a python module that is handful when starting a web browser. It is called the webbrowser module. I'll show how it works in the example below:

#!usr/bin/env python

import datetime
from bottle import Bottle, route, run

app = Bottle ( )

@app.route ( "/"
def index ( ):
    now = datetime.datetime.now( )
  
    nowDate = now.strftime( "%d %B, %Y " )

    return " Today's date is {0} or {1} ".format( now, nowDate )


if __name__ == '__main__':
    
    import webbrowser

    webbrowser.open( "localhost:8080/" )


    app.run(
         port=8080,
         server='paste'
     )

Creating multiple functions

Functions are the building blocks of any programming language. We have already seen a function, that is, the index function wrapped with a decorator. We will later see how python decorators are built. Creating multiple functions is easy in bottle provided they are wrapped with the same decorator. Let us create some:

@app.route( " / " )
def index ( ):
    return " This is the Index Page"


@app.route( " /profile " )
def profile ( ):
    return " This is the profile page. "


@app.route( " /about " )
def about( ):
    return " This is the about page. "

This demonstrates the power of python functions, decorator and routing functions in separating concerns. If you have not observed already, bottle follows a strict MVC design pattern; which is a good OOD principle.

You may ask questions where you don't understand...

I'm using Linux not Windows

I want to learn Phyton

seunny4lif:
I'm using Linux not Windows
I want to learn Phyton

Those python codes run on both windows and unix environment, including linux.

webstacka:


Those python codes run on both windows and unix environment, including linux.

I'm a beginner in Python programming
I know Java but not GUI sha and I want to add python then straight to Mobile app becos I like app

What do you think ?

seunny4lif:

I'm a beginner in Python programming
I know Java but not GUI sha and I want to add python then straight to Mobile app becos I like app

What do you think ?

just keep learning python, you will soon master it. Python can be used to create desktop and web application. Also, android and IOS apps can be created with python.

webstacka:


just keep learning python, you will soon master it. Python can be used to create desktop and web application. Also, android and IOS apps can be created with python.

Hope u wouldn't be needing HTML sha
Thanks
Python look more simple than Java
Python is easy to grab unlike Java.

seunny4lif:
Hope u wouldn't be needing HTML sha Thanks Python look more simple than Java Python is easy to grab unlike Java.

No. No html...

python my wife

webstacka:


No. No html...

Android Application
Java and HTLM ?

seunny4lif:

Android Application
Java and HTLM ?

i said you do not need html to develop android apps in python. You need the kivy framework.

Good morning. Like I said before, we are learning python programming using a web application.

The first you will notice about python is its data types. Python data types are classified into five:

1) integers - negative or positive whole numbers (int) e.g 2, 100, etc.

2) floats - negative or positive decimal points (float) e.g 2.356, -1.846, etc.

3) strings - characters, alphabets and words, enclosed with single or double quotation marks. E.g 'hello', "python bottle", "12*#/", etc.

4) boolean values - true or false statements, denoted by True or False. E.g pay=False, loggedIn=True

5) null values - this is not really a standard data type, but since python is a dynamic language, its data types can change during execution. Thus, a null value is dynamic and its value can change from one data type to another. It is denoted by None. E.g myFruit = None

Let us see how it works. Now open the lesson.py file and type this in your index function:

principal = 200
rate = 10.5
myTime2 = 10
interest = principal * (rate/100) * myTime

result = " <h1>After 10 years, your interest = {0} </h1>".format(interest)

return result

the above code shows how to solve simple interest in python.

Save it. Run and navigate to localhost:8080/

what do you see?

You can see how easy it is to embed python codes in html.

Django seems a lot easier and quicker to bring product to market. but will check this out
so bottle is a micro framework? people will be better of learning django. its a "batteries included" framework

Snwokenk:
Django seems a lot easier and quicker to bring product to market. but will check this out
so bottle is a micro framework? people will be better of learning django. its a "batteries included" framework

Yeah, but if you need to make a simple webapp or a simple REST services, django might be too bloated for that, i personally recommend that someone should learn a full framework and a micro framework

Snwokenk:
Django seems a lot easier and quicker to bring product to market. but will check this out
so bottle is a micro framework? people will be better of learning django. its a "batteries included" framework

Django is a nice framework, but its not good for teaching beginners web programming. You must have a fair mastery of python to use django. In fact, if you develop an OOD-based web app in bottle, you'll most likely observe that you've developed your own web framework -- and the joy of creating a web framework!

webstacka:


Django is a nice framework, but its not good for teaching beginners web programming. You must have a fair mastery of python to use django. In fact, if you develop an OOD-based web app in bottle, you'll most likely observe that you've developed your own web framework -- and the joy of creating a web framework!

I am planning learning python soon . Is there similarity with bottle micro- framework and flask.

proxy20:



I am planning learning python soon . Is there similarity with bottle micro- framework and flask.

I was about to ask this question too?

proxy20:



I am planning learning python soon . Is there similarity with bottle micro- framework and flask.

yeah...a lot similar. In fact, bottle is flask without werkzeug.

webstacka:

yeah...a lot similar. In fact, bottle is flask without werkzeug.

nice