What exactly is Python?
Python is one of the most widely used programming languages. Guido van Rossum created it, and it was published in 1991.It's used for server-side web development, software development, mathematics, and system programming.
What does Python have to offer?
Python may be used to construct web applications on a server.Python may be used to develop workflows in conjunction with other software.
Python has the ability to connect to database systems. It also has the ability to read and change files.
Python may be used to work with large amounts of data and execute sophisticated calculations.
Python may be used for quick prototyping as well as creation of production-ready applications.
What makes Python so special?
Python may be used on a variety of systems (Windows, Mac, Linux, Raspberry Pi, etc).Python has a basic grammar that is comparable to that of English.
Python offers a syntax that enables programmers to create code.
Compared to other programming languages, it has less lines.
Python is an interpreter language, which means that code may be run as soon as it is written. As a result, prototyping may be done relatively quickly.
Python may be approached in three ways: procedural, object-oriented, and functional.
It's good to know.
Python 3 is the most recent major version of Python, which we will use in this course. Python 2, on the other hand, is still highly popular, despite the fact that it is only maintained with security upgrades.
Python will be written in a text editor in this session. Python may be written in an Integrated Development Environment (IDE), such as Thonny, Pycharm, Netbeans, or Eclipse, which is especially handy for managing big volumes of data.
Python scripts.
When comparing Python syntax to those of other computer languages,Python was created with readability in mind, and it bears some resemblance to the English language, with a mathematical impact.In contrast to other programming languages, Python employs new lines to finish commands, rather than semicolons or parentheses.
Indentation and whitespace are used in Python to describe scope, such as the scope of loops, functions, and classes. Curly brackets are commonly used in other computer languages for this reason.
Statements and control flow
Python's statements include:
·
The assignment statement, using a single equals sign =
·
The if statement, which conditionally executes a block of code,
along with else and elif (a contraction of else-if)
·
The for statement, which iterates over an iterable object,
capturing each element to a local variable for use by the attached block
·
The while statement, which executes a block of code as long as its
condition is true
·
The try statement, which allows exceptions raised in its attached
code block to be caught and handled by except clauses;
it also ensures that clean-up code in a finally block is always run regardless of how the block exits
·
The raise statement, used to raise a specified exception or re-raise
a caught exception
·
The class statement, which executes a block of code and attaches its
local namespace to a class, for use in object-oriented programming
·
The def statement, which defines a function or method
· The with statement, which encloses a code block within a context manager (for example, acquiring a lock before it is run, then releasing the lock; or opening and closing a file), allowing resource-acquisition-is-initialization (RAII)-like behavior and replacing a common try/finally idiom
·
The break statement, which exits a loop
·
The continue statement, which skips the current iteration and continues
with the next
·
The del statement, which removes a variable—deleting the reference
from the name to the value, and producing an error if the variable is referred
to before it is redefined
·
The pass statement, serving as a NOP, syntactically needed to create an empty code block
·
The assert statement, used in debugging to check for conditions that
should apply
·
The yield statement, which returns a value from a generator function (and also an operator); used to implement coroutines
·
The return statement, used to return a value from a function
·
The import statement, used to import modules whose functions or
variables can be used in the current program
The assignment statement (=) binds a name as
a reference to a separate,
dynamically-allocated object. Variables may subsequently be rebound at any
time to any object. In Python, a variable name is a generic reference holder
without a fixed data type; however, it always refers to some object
with a type. This is called dynamic typing—in contrast to statically-typed languages, where each variable may contain only a value of
a certain type.
Python does not support tail call optimization
or first-class
continuations, and, according to
van Rossum, it never will. However, better support for coroutine-like functionality is provided by extending Python's generators.Before 2.5, generators were lazy iterators; data was passed unidirectionally out of the
generator. From Python 2.5 on, it is possible to pass data back into a
generator function; and from version 3.3, it can be passed through multiple
stack levels
Summary of Python 3's built-in types
|
summary of python 3's built-in types |
|||
|
type |
description |
syntax examples |
|
|
bool |
immutable |
true |
|
|
bytearray |
mutable |
sequence of bytes |
bytearray(b'some ascii') |
|
bytes |
immutable |
sequence of bytes |
b'some ascii' |
|
complex |
immutable |
complex number with real and imaginary parts |
3+2.7j |
|
dict |
mutable |
associative array (or dictionary) of key and value pairs; can contain mixed types (keys and values), keys must be a hashable type |
{'key1': 1.0, 3: false} |
|
types.ellipsistype |
immutable |
an ellipsis placeholder to be used as an index in numpy arrays |
... |
|
float |
immutable |
double-precision floating-point number. the precision is machine-dependent but in practice is generally implemented as a 64-bit ieee 754 number with 53 bits of precision.[98] |
1.33333 |
|
frozenset |
immutable |
unordered set, contains no duplicates; can contain mixed types, if hashable |
frozenset([4.0, 'string', true]) |
|
int |
immutable |
42 |
|
|
list |
mutable |
list, can contain mixed types |
[4.0, 'string', true] |
|
types.nonetype |
immutable |
an object representing the absence of a value, often called null in other languages |
none |
|
types.notimplementedtype |
immutable |
a placeholder that can be returned from overloaded operators to indicate unsupported operand types. |
notimplemented |
|
range |
immutable |
a sequence of numbers commonly used for looping specific number of times in for loops[100] |
range(-1, 10) |
|
set |
mutable |
unordered set, contains no duplicates; can contain mixed types, if hashable |
{4.0, 'string', true} |
|
str |
immutable |
a character string: sequence of unicode codepoints |
'wikipedia' """spanning multiple lines""" |
|
tuple |
immutable |
can contain mixed types |
(4.0, 'string', true) |
Python LibrariesPython's large standard library, commonly cited as one of its greatest strengths, provides tools suited to many tasks. For Internet-facing applications, many standard formats and protocols such as MIME and HTTP are supported. It includes modules for creating graphical user interfaces, connecting to relational databases, generating pseudorandom numbers, arithmetic with arbitrary-precision decimals, manipulating regular expressions, and unit testing. Some parts of the standard library are covered by specifications—for example, the Web Server Gateway Interface (WSGI) implementation As of September 2021, the Python Package Index (PyPI), the official repository for third-party Python software, contains over 329,000 packages with a wide range of functionality, including:
|
Python Popularity
Since 2003, Python has consistently ranked in the top ten most popular programming languages in the TIOBE Programming Community Index where, as of October 2021, it is the most popular language (ahead of Java, and C) It was selected Programming Language of the Year (for "the highest rise in ratings in a year") in 2007, 2010, 2018, and 2020 (the only language to do so four times).
An empirical study found that scripting languages, such as Python, are more productive than conventional languages, such as C and Java, for programming problems involving string manipulation and search in a dictionary, and determined that memory consumption was often "better than Java and not much worse than C or C++".
Large organizations that use Python include Wikipedia, Google, Yahoo!, CERN, NASA,Facebook,Amazon, Instagram, Spotify and some smaller entities like ILM and ITA. The social news networking site Reddit was written mostly in Python.
Getting Python
Next, install the Python 3 interpreter on your computer. This is the program that reads Python programs and carries out their instructions; you need it before you can do any Python programming. Mac and Linux distributions may include an outdated version of Python (Python 2), but you should install an updated one (Python 3). See BeginnersGuide/Download for instructions to download the correct version of Python.
There are also Python interpreter and IDE bundles available, such as Thonny. Other options can be found at IntegratedDevelopmentEnvironments.
At some stage, you'll want to edit and save your program code. Take a look at HowToEditPythonCode for some advice and recommendations.
Learning Python
Next, read a tutorial and try some simple experiments with your new Python interpreter.
If you have never programmed before, see BeginnersGuide/NonProgrammers for a list of suitable tutorials.
If you have previous programming experience, consult BeginnersGuide/Programmers, which lists more advanced tutorials.
If English isn't your first language, you might be more comfortable with a tutorial that's been translated into your language. Consult python.org's list of Non-English resources.
Most tutorials assume that you know how to run a program on your computer. If you are using Windows and need help with this, see How do I Run a Program Under Windows.
Some sites offer in-browser coding for those who want to learn Python:
Dataquest for Python for data science.
HackInScience free and open source platform.
High School Technology Services for general Python"
Print a cheat sheet of the most important Python features and post it to your office wall until you know the basics well.
Once you have read a tutorial, you can browse through Python's online documentation. It includes a tutorial that might come in handy, a Library Reference that lists all of the modules that come standard with Python, and the Language Reference for a complete (if rather dry) explanation of Python's syntax.
When you are ready to write your first program, you will need a text editor or an IDE. If you don't want to use Thonny or something more advanced, then you can use IDLE, which is bundled with Python and supports extensions.
What is the main use of Python?
Python is commonly used for developing websites and
software, task automation, data analysis, and data visualization. Since
it's relatively easy to learn, Python has been adopted by many non-programmers
such as accountants and scientists, for a variety of everyday tasks, like
organizing finances.
Python is easy to learn?
Python is widely considered one of the easiest
programming languages for a beginner to learn, but it is also difficult to
master. Anyone can learn Python if they work hard enough at it, but becoming a
Python Developer will require a lot of practice and patience.
Can I learn python on own?
Yes, it's very possible to learn Python on your own.
There are a wide variety of learning resources available on the web to help you
learn Python for everything from game development to robotics.
Python is used for games?
Popular video games like Battlefield 2, Pirates of the
Caribbean, among others use Python programming for a number of
its functionalities and add-ons. With the advancement in the gaming industry,
Python language has proved to be an exceptional choice by the developers for
rapid prototyping of video games..
Python is enough to get a job?
Python might be enough to get a job, but most jobs
require a set of skills. ... For example, you might get a job to write Python code
that connects to a MySQL database. To build a web application, you need
Javascript, HTML, and CSS. If you want to get into machine learning, you need
to know about mathematical modeling.
Python is used professionally?
Python is rather widely used for scripting. This includes
various testing / building / deployment / monitoring frameworks, scientific
apps and just quick scripts. Python is rather widely used as embedded language.
Can I learn Python without any programming experience?
Yes, you can learn Python without programming experience of any other programming language. Python is very easy to learn because of the English language like syntax. ... If you want to learn Python with hands-on projects, you can check out this Python Training Course by Intellipaat.
I must recommended best python book
How can i start Python?
Follow the following steps to run Python on your
computer.
- Download
Thonny IDE.
- Run
the installer to install Thonny on your computer.
- Go to:
File > New. Then save the file with . ...
- Write
Python code in the file and save it. Running Python using Thonny IDE.
- Then
Go to Run > Run current script or simply click F5 to run it.
Python coding or programming?
Python is an interpreted, object-oriented, high-level programming language with dynamic semantics.
