Hello guys in this blog i am going to teach you python programming.

in this blog you will get the best combination of  theory and practical ,i.e-programs

and as well as you will get a lot of tricky program here -

this post will gonna be my first post on the python programming ,keep supporting and loving and learn more and more.

Regards.

So first of all let us try to know that what is called a language ?

or what does mean by a language ?

A lot of people without knowing that what is language, try to learn different programming languages.

so first of let clear this point -

language is the medium of communication ,when a person want to share her/his views with any other candidate he use different languges like -hindi,english,urdu,chinese, or any other language.

In the same way when we want to communicate with the computer  we need a programming language to performing our task or we need to write a program.

and this can be done in different languages like C,C++,java,python and many more available in the market.

now come to the point about the python language.

PYTHON INTRODUCTION-:

What is Python?

Python is a popular programming language. It was created by Guido van Rossum, and released in 1991.

It is used for:

• web development (server-side),
• software development,
• mathematics,
• system scripting.

What can Python do?

• Python can be used on a server to create web applications.
• Python can be used alongside software to create workflows.
• Python can connect to database systems. It can also read and modify files.
• Python can be used to handle big data and perform complex mathematics.
• Python can be used for rapid prototyping, or for production-ready software development.

Why Python?

• Python works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc).
• Python has a simple syntax similar to the English language.
• Python has syntax that allows developers to write programs with fewer lines than some other programming languages.
• Python runs on an interpreter system, meaning that code can be executed as soon as it is written. This means that prototyping can be very quick.
• Python can be treated in a procedural way, an object-orientated way or a functional way.

Good to know

• The most recent major version of Python is Python 3, which we shall be using in this tutorial. However, Python 2, although not being updated with anything other than security updates, is still quite popular.
• In this tutorial Python will be written in a text editor. It is possible to write Python in an Integrated Development Environment, such as Thonny, Pycharm, Netbeans or Eclipse which are particularly useful when managing larger collections of Python files.

Python Syntax compared to other programming languages

• Python was designed for readability, and has some similarities to the English language with influence from mathematics.
• Python uses new lines to complete a command, as opposed to other programming languages which often use semicolons or parentheses.
• Python relies on indentation, using whitespace, to define scope; such as the scope of loops, functions and classes. Other programming languages often use curly-brackets for this purpose.

FEW  TRICKY PROGRAM FOR THOSE WHO ALREADY KNOW GOOD PYTHON-:

1. What will be the output of the following Python code?

def foo(k):
    k = [1]
q = [0]
foo(q)
print(q)

a) [0]
b) [1]
c) [1, 0]
d) [0, 1]

Answer: a
Explanation: A new list object is created in the function and the reference is lost. This can be checked by comparing the id of k before and after k = [1].

2. How are variable length arguments specified in the function heading?
a) one star followed by a valid identifier
b) one underscore followed by a valid identifier
c) two stars followed by a valid identifier
d) two underscores followed by a valid identifier

Answer: a
Explanation: Refer documentation.

3. Which module in the python standard library parses options received from the command line?
a) getopt
b) os
c) getarg
d) main

Answer: a
Explanation: getopt parses options received from the command line.

4. What is the type of sys.argv?
a) set
b) list
c) tuple
d) string

Answer: b
Explanation: It is a list of elements.