A Byte of Python - What Next Python


What Next

If you have read this book thoroughly till now and practiced writing a lot of programs, then you must have become comfortable and familiar with Python. You have probably created some Python programs to try out stuff and to exercise your Python skills as well. If you have not done it already, you should. The question now is 'What Next?'.

I would suggest that you tackle this problem:

Create your own command-line address-book program using which you can browse, add, modify, delete or search for your contacts such as friends, family and colleagues and their information such as email address and/or phone number. Details must be stored for later retrieval.

This is fairly easy if you think about it in terms of all the various stuff that we have come across till now. If you still want directions on how to proceed, then here's a hint 1.

Once you are able to do this, you can claim to be a Python programmer. Now, immediately send me an email thanking me for this great book ;-). This step is optional but recommended. Also, please consider buying a printed copy to support the continued development of this book.

If you found that program easy, here's another one:

Implement the replace command. This command will replace one string with another in the list of files provided.

The replace command can be as simple or as sophisticated as you wish, from simple string substitution to looking for patterns (regular expressions).

Next Projects

If you found above programs easy to create, then look at this comprehensive list of projects and try writing your own programs: https://github.com/thekarangoel/Projects#numbers (the same list is also at Martyr2's Mega Project List).

Also see:

Exercises for Programmers: 57 Challenges to Develop Your Coding Skills
Intermediate Python Projects.

예시 코드

The best way to learn a programming language is to write a lot of code and read a lot of code:

Python Cookbook is an extremely valuable collection of recipes or tips on how to solve certain kinds of problems using Python. This is a must-read for every Python user.
Python Module of the Week is another excellent must-read guide to the Standard Library.

Advice

The Hitchhiker's Guide to Python!
The Elements of Python Style
Python Big Picture
"Writing Idiomatic Python" ebook (paid)

Videos

Full Stack Web Development with Flask
PyVideo

Questions and Answers

Official Python Dos and Don'ts
Official Python FAQ
Norvig's list of Infrequently Asked Questions
Python Interview Q & A
StackOverflow questions tagged with python

Tutorials

Hidden features of Python
What's the one code snippet/python trick/etc did you wish you knew when you learned python?
Awaretek's comprehensive list of Python tutorials

Discussion

If you are stuck with a Python problem, and don't know whom to ask, then the python-tutor list is the best place to ask your question.

Make sure you do your homework by trying to solving the problem yourself first and ask smart questions.

News

If you want to learn what is the latest in the world of Python, then follow the Official Python Planet.

Installing libraries

There are a huge number of open source libraries at the Python Package Index which you can use in your own programs.

To install and use these libraries, you can use pip.

Creating a Website

Learn Flask to create your own website. Some resources to get started:

Flask Official Quickstart
The Flask Mega-Tutorial
Example Flask Projects

그래픽 소프트웨어

Suppose you want to create your own graphical programs using Python. This can be done using a GUI (Graphical User Interface) library with their Python bindings. Bindings are what allow you to write programs in Python and use the libraries which are themselves written in C or C++ or other languages.

There are lots of choices for GUI using Python:

- Kivy
- PyGTK
: 이 것은  GNOME이 만들어진 기반에 있는 GTK+ 툴킷에 대한 파이썬 바인딩이다. GTK+ has many quirks in usage but once you become comfortable, you can create GUI apps fast. The Glade graphical interface designer is indispensable. The documentation is yet to improve. GTK+ works well on GNU/Linux but its port to Windows is incomplete. You can create both free as well as proprietary software using GTK+. To get started, read the PyGTK tutorial.
- PyQt
: 이 것은 KDE가 만들어진 기반에 있는 Qt툴킷에 대한 파이썬 바인딩이다. Qt is extremely easy to use and very powerful especially due to the Qt Designer and the amazing Qt documentation. PyQt is free if you want to create open source (GPL'ed) software and you need to buy it if you want to create proprietary closed source software. Starting with Qt 4.5 you can use it to create non-GPL software as well. To get started, read about PySide.
- wxPython
: 이 것은 wxWidgets 툴킷을 위한 파이썬 바인딩이다. wxPython has a learning curve associated with it. However, it is very portable and runs on GNU/Linux, Windows, Mac and even embedded platforms. There are many IDEs available for wxPython which include GUI designers as well such as SPE (Stani's Python Editor) and the wxGlade GUI builder. You can create free as well as proprietary software using wxPython. To get started, read the wxPython tutorial.

GUI 도구를 위한 갈무리

For more choices, see the GuiProgramming wiki page at the official python website.

Unfortunately, there is no one standard GUI tool for Python. I suggest that you choose one of the above tools depending on your situation. The first factor is whether you are willing to pay to use any of the GUI tools. The second factor is whether you want the program to run only on Windows or on Mac and GNU/Linux or all of them. The third factor, if GNU/Linux is a chosen platform, is whether you are a KDE or GNOME user on GNU/Linux.

For a more detailed and comprehensive analysis, see Page 26 of the 'The Python Papers, Volume 3, Issue 1' (PDF).

다양한 구현

There are usually two parts a programming language - the language and the software. A language is how you write something. The software is what actually runs our programs.

We have been using the CPython software to run our programs. It is referred to as CPython because it is written in the C language and is the Classical Python interpreter.

There are also other software that can run your Python programs:

- Jython
: A Python implementation that runs on the Java platform. This means you can use Java libraries and classes from within Python language and vice-versa.

- IronPython
: A Python implementation that runs on the .NET platform. This means you can use .NET libraries and classes from within Python language and vice-versa.

- PyPy
: A Python implementation written in Python! This is a research project to make it fast and easy to improve the interpreter since the interpreter itself is written in a dynamic language (as opposed to static languages such as C, Java or C# in the above three implementations)

There are also others such as CLPython - a Python implementation written in Common Lisp and Brython which is an implementation on top of a JavaScript interpreter which could mean that you can use Python (instead of JavaScript) to write your web-browser ("Ajax") programs.

Each of these implementations have their specialized areas where they are useful.

펑셔널 프로그래밍 (어드벤스드 유져를 위한)

큰 프로그램을 작성할 때 객체 지향적 프로그램 챕터에서 배운 클래스 기반 접근으로 전환할 수 있어야 한다.

Functional Programming Howto by A.M. Kuchling
Functional programming chapter in 'Dive Into Python' book
Functional Programming with Python presentation
Funcy library
PyToolz library

Summary

We have now come to the end of this book but, as they say, this is the the beginning of the end!. You are now an avid Python user and you are no doubt ready to solve many problems using Python. You can start automating your computer to do all kinds of previously unimaginable things or write your own games and much much more. So, get started!

1. Create a class to represent the person's information. Use a dictionary to store person objects with their name as the key. Use the pickle module to store the objects persistently on your hard disk. Use the dictionary built-in methods to add, delete and modify the persons. ↩


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