WHY PYTHON

Have your cake and eat it, too:

Productivity and readable code

VHLLs will gain on system languages

(John Ousterhout)

"Life's better without braces"

(Bruce Eckel)

WHY EVERYONE CHOOSING PYTHON

TRAINING -REASON

There are many good reasons to choose

Python as your primary programming

language. First of all Python is an easy to

learn, powerful programming language.

Furthermore it has efficient high-level data

structures, which allow you to write complex

operations in fewer statements than in C, C++

or Java.

Object-oriented programming is a lot easier

than in languages like Java.

WHAT IS PYTHON TRAINING

Python has become one of the most popular

programming languages among developers

and programmers. They praise it for its clean

syntax and code readability. Python is a

general-purpose high-level programming

language. Python is both object oriented and

imperative and it can be even used in a

functional style as well. Python programs are

portable, i.e. they can be ported to other

operating systems like Windows, Linux, Unix

and Mac OS X, and they can be run on Java

and .NET virtual machines.

With the Python interactive interpreter it is easy to

check Python commands. The Python interpreter

can be invoked by typing the command "python"

without any parameter followed by the "return" key

at the shell prompt:

Python comes back with the following information:

Python 2.5.2 (r252:60911, Oct 5 2008, 19:29:17)

[GCC 4.3.2] on linux2

Type "help", "copyright", "credits" or "license" for

more information.

>>>

Using the Python Interpreter

Python Internals

Python is both an interpreted and a compiled

language. But calling Python a compiled

language would be misleading. People would

assume that the compiler translates the

Python code into machine language.

Compiler

Definition: A compiler is a computer

program that transforms (translates) source

code of a programming language (the

source language) into another computer

language (the target language). In most

cases compilers are used to transform

source code into executable program, i.e.

they translate code from high-level

programming languages into low (or lower)

level languages, mostly assembly ore

machine code.

Interpreter

Definition: An interpreter is a computer

program that executes instructions written in a

programming language. It can either execute

the source code directly or

translates the source code in a first step into a

more efficient representation and executes this

code

Structuring with Indentation

Most programming languages use certain characters or

keywords to group statements:

begin ... end

do ... done

{ ... }

if ... fi

Python uses a different principle. Programs get structured

through indentation, this means that code blocks are defined by

their indentation. Okay that's what we expect from any program

code, isn't it? Yes, but in the case of Python it's a language

requirement not a matter of style. This principle makes it easier

to read and understand other people's Python code.

List Comprehension

List comprehension is an elegant way to define

and create list in Python. These lists have often

the qualities of sets, but are not in all cases

sets.

List comprehension is a complete substitute for

the lambda function as well as the functions

map(), filter() and reduce(). For most people the

syntax of list comprehension is easier to be

grasped.

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