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What Is Python? | History, Features, Syntax, Tips & More (+Examples)

Python is a high-level, object-oriented dynamic language developed by Guido van Rossum as a pet project. Released in 1991, it has become extremely popular for its unique features and is the go-to language for countless developers globally.
Shivani Goyal
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What Is Python? | History, Features, Syntax, Tips & More (+Examples)
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Table of content: 

  • What Is Python? An Introduction
  • What Is The History Of Python?
  • Key Features Of The Python Programming Language
  • Who Uses Python?
  • Basic Characteristics Of Python Programming Syntax
  • Why Should You Learn Python?
  • Applications Of Python Language
  • Advantages And Disadvantages Of Python
  • Some Useful Python Tips & Tricks For Efficient Programming
  • Python 2 Vs. Python 3: Which Should You Learn?
  • Python Libraries
  • Conclusion
  • Frequently Asked Questions
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Wondering what is Python? Wait, we aren't talking about the slithering serpent that comes to the mind of most people when they hear this word. We are talking about the high-level, object-oriented, general-purpose programming language that has taken the tech world by storm. Renowned for its readability and expressiveness, Python beckons developers into a world where code becomes a language of its own- a language not just comprehensible to machines but also to those who craft it.

In this article, we will embark on a journey through the multiple facets of what Python truly is and how it became the darling of the programming world. We will begin by exploring the history of Python to trace its origin, uncover its complexities, shine a light on its remarkable merits, and candidly discuss its limitations in comparison to its programming peers.

We will also traverse the paths of Python 2 and Python 3 and unearth the distinctive features of these versions, along with other noteworthy iterations. By the time we conclude, you will fully understand what is Python and will be empowered to wield its magic in your own coding endeavors. 

What Is Python? An Introduction

In the dynamic realm of programming languages, Python stands as a towering figure, weaving a rich tapestry of simplicity, versatility, and innovation. Conceived in the late 1980s by the ingenious Guido van Rossum, Python has evolved into a programming language that transcends boundaries and resonates across diverse sectors of the technological landscape.

  • Python is an object-oriented, high-level, interpreted programming language with dynamic semantics.
  • It is suitable for Rapid Application Development as well as for usage as a scripting or glue language to link already existing components because of its high-level built-in data structures, dynamic typing, and dynamic binding.
  • Python's basic, English-like syntax places a strong focus on readability and has an easy learning curve. This also lowers the cost of program maintenance for users.
  • Python's support for modules and packages promotes the modularity and reuse of code in programs.
  • The comprehensive standard library and the Python interpreter are freely distributable and are offered in source or binary form for all commonly used platforms.

In recent years, it has grown to be among the most widely used, popular, and versatile programming languages. Large software components are being successfully assembled using Python, an advanced scripting language. Additionally, Python is used in several professions beyond the IT sector.

What Is The History Of Python?

What Is Python? Learn about its history with this graphical timeline.

The history of the Python programming language is marked by its evolution from a pet project to a powerhouse in the world of software development. It is not just a chronicle of versions and releases. It is a testament to the collaborative spirit of its community, the adaptability of its design, and its enduring commitment to simplicity and readability. Here's a brief overview of its key milestones-

  • Genesis (Late 1980s): Python's story begins in the late 1980s when Guido van Rossum, a Dutch programmer, started working on a hobby project during the Christmas holidays. His goal was to create a language that emphasized code readability and allowed for the creation of both small and large-scale software projects.

  • Python 0.9.0 (February 1991): The first official release of Python, version 0.9.0, came in February 1991. This release already included features that have remained integral to Python, such as exception handling, functions, and modules.

  • Python 1.0 (January 1994): The beginning of 1994 brought the release of Python 1.0 and marked the language's maturation. The January issue included features like lambda, map, filter, and reduce, reflecting a growing emphasis on functional programming constructs.

  • Python 2.0 (October 2000): The next milestone for this language was the release of Python 2.0 in October 2000. This version introduced list comprehensions, garbage collection, and Unicode support. And also solidified Python's position as a powerful and efficient language for various applications.

  • The PEP Process (2000 Onwards): Guido van Rossum introduced the Python Enhancement Proposal (PEP) process in 2000 to manage and propose new features for the language. This transparent and community-driven approach allowed developers to actively participate in shaping the language's future.

  • Python 3.0 (December 2008): Also known as Python 3000 or Py3k for short, the release of Python 3.0 represents one of the most significant milestones in its history. It aimed to rectify design flaws and improve the language's consistency. While backward incompatible, Python 3 laid the foundation for a more robust and modern language.

  • Community Growth and Ecosystem (2010s): Throughout the 2010s, Python's community and ecosystem expanded rapidly. The growth was fueled by the rise of web development frameworks like Django and Flask, data science libraries such as NumPy and Pandas, and the language's suitability for machine learning and artificial intelligence.

  • Guido van Rossum's Retirement (July 2018): In July 2018, Guido van Rossum, the Benevolent Dictator For Life (BDFL) of Python, stepped down from his leadership role. This marked a shift in the governance model, with the Python Steering Council taking over the decision-making process.

  • Python 2 End of Life (January 2020): Python 2 reached the end of its life on January 1, 2020. With this, the Python community's focus shifted entirely to Python 3, encouraging users to migrate their codebases to the latest version.

  • Python 3.9 (October 2020): Python 3.9 continued the tradition of introducing new features and optimizations. It showcased Python's commitment to staying at the forefront of technology while maintaining stability and backward compatibility.

  • Continued Relevance and Future (2020s Onwards): Python's popularity continues to soar in the 2020s, with its applications expanding into areas such as data science, machine learning, and artificial intelligence. The language's readability, extensive library support, and vibrant community position it as a linchpin in contemporary software development.

Key Features Of The Python Programming Language The most prominent features of Python programming language

As we’ve mentioned before, Python is a high-level, object-oriented, and dynamically typed language. While it is known for its simplicity and readability, some other important features of the language are:

  • Interpreted Language: This implies that Python code is executed one line at a time, making it an interpreted language. Also, in comparison to other popular languages like C, C++, Java, etc., Python code does not require compilation, making it easier to debug. In fact, an immediate format called the Bytecode is created from Python's source code.
  • Cross-platform Language: Python is compatible with many operating systems/ platforms, including Windows, macOS, Linux, etc. This feature allows Python code to be portable across platforms, further allowing programmers to write code once and run it indistinguishably on several platforms.
  • Free and Open Source: The language is free to download and use. Users can download Python from the official website. In addition to that, the public can also see the source code since Python is open-source.
  • Object Oriented: Python has object-oriented programming features, enabling the creation and use of classes, objects, and inheritance. It encourages modular and reusable code, making it easier to develop complex applications.
  • Broad Standard Library: Python contains a huge standard library with a wide selection of modules and functions, so you don't need to write any of your own code. Regular expressions, unit testing, web browsers, and other tools are all part of Python's sizable library.
  • GUI Support: It is possible to create/ develop graphical user interfaces in Python by using packages like PyQt5, PyQt4, wxPython, or Tk.
  • Easy to Use and Maintain: Python is pretty easy to pick up compared to other languages like C, C#, Javascript, etc. Anyone can pick up the basics of the relatively easy programming language in even a few hours or days. These features have won Python the title of one of the most user-friendly programming languages out there.
  • Robust: The robustness of Python is owed to its formidable error-management capabilities, which let programmers find and fix errors in their code effectively. These features include integrated exception handling and traceback information.
  • Dynamically Typed: Python is a dynamically typed language, i.e., the variable type is decided at run time (for example, int, double, long, etc.). This feature eliminates the need for users to declare the type of a variable.

These features contribute to making Python the popular choice for beginners, experienced developers, and scientists alike. Thus making it a versatile language for a wide range of applications.

Who Uses Python?

Candidates with a strong understanding of Python are sought after by a broad range of financial institutions, IT firms, government organizations, and more for positions in data science, web development, and other related fields. In general, Python developers (also known as Web developers or, more accurately, Back-End developers) use Python to create a variety of things, including websites, programs, games, and more. Let's take a look at different sectors that use Python today:

  • Big Tech Companies: Several large corporations, including Intel, IBM, NASA, Pixar, Netflix, Facebook, JP Morgan Chase, Spotify, etc., use Python. In fact, the language is one of Google's four primary programming languages and is also extensively used on YouTube. The same is true of Instagram, Pinterest, and Reddit.
  • Startups: Many startups choose Python for its rapid development capabilities and the ability to scale as their projects grow. The language's extensive ecosystem and community support are advantageous for startups with limited resources.

  • Developers: Python was also used to create the initial BitTorrent client. Additionally, it serves as a scripting language for Maya, the predominant 3D modeling and animation program. Django and Flask, two popular web development frameworks, are also built using Python. Many web applications, including Instagram and Pinterest, leverage Python for their backend development.
  • Engineers: Because Python's libraries are so simple to use, production engineers at Facebook are freed up to concentrate on getting updates live rather than writing and maintaining a lot of code. Additionally, it guarantees effective infrastructure scaling for Facebook. Uber, Goldman Sachs, PayPal, Netflix, and Google are a few well-known companies that need developers, engineers, and data specialists who are proficient in Python.
  • Finance: In the finance industry, Python is employed for quantitative analysis, risk management, and algorithmic trading. Financial institutions and hedge funds use Python for its flexibility and extensive library support.

  • Non-IT Sectors: Python is used across sectors and is not just sought after in certain industries. This language is used extensively in a variety of domains, including astronomy, social science, artificial intelligence (AI), and the Internet of Things (IoT).
  • Students and Beginners: Students can easily comprehend Python thanks to its clear/ simple syntax and readability, which allows them to concentrate on grasping important programming principles. Python encourages young people's creativity and curiosity since it is a flexible language that can be used in a variety of industries, including game creation, data analysis, and web development.

Basic Characteristics Of Python Programming Syntax

Python syntax refers to the set of rules that dictate how Python code should be written to ensure it is both syntactically correct and logically meaningful. Here are key aspects of Python syntax:

Indentation In Python Syntax

When writing programs, we quite often have to provide blocks of code to indicate elements such as functions, loops, conditional statements, etc. But how? Well, in Python, we use indentation to mark blocks of code. In other words, consistent indentation is essential for defining the code structure.

Unlike many other programming languages that use braces or keywords, Python relies on the level of indentation to determine the scope of code blocks. We make use of a number of leading whitespace (either tabs or spaces, not both) to establish the line's indentation level. By default, a single indent level in Python is four spaces (or one tab). For example-

if x > 0:
    print("Positive number")
else:
    print("Non-positive number")

Whitespace

Python is whitespace-sensitive, and the amount of indentation matters. Consistency in indentation is crucial for the correct interpretation of code blocks. Mixing tabs and spaces or inconsistent indentation can lead to syntax errors.

# Good indentation
if x > 0:
    print("Positive number")

# Incorrect indentation (may cause an error)
if x > 0:
     print("Positive number")

In the first block, we have four spaces (i.e., one tab) to indent the if-statement, which is the correct way to indent. In the second block though, we have used one tab and a whitespace, leading to incorrect indentation.

Colon (:) For Code Blocks

We use a colon in Python syntax to denote the beginning of a code block, such as in the case of loops, conditionals, and function definitions. The indented lines that follow the colon form the body of the block. For example-

for i in range(5):
print(i)

Comments In Python

Coders, programmers, or software developers writing codes in Python can leave remarks (description or annotation) for fellow programmers, just like in any other programming language. However, in contrast, comments in Python start with the hashtag symbol (#) and are used to provide explanations or documentation within code. 

They are included to make the source code more human-readable, while the Python interpreter ignores them. Python allows both single-line (or end-of-line) and multi-line (block) comments. For example-

# This is a single-line comment
"""
This is a
multi-line comment
"""

Variables & Assignment

In Python, variables are created simply by assigning values to the names of variables using the assignment operator (=). Since it is dynamically typed, the variable types are inferred at runtime. For example-

x = 10
name = "Shivani"

Data Types

Python supports various data types, including integers, floats, strings, lists, tuples, dictionaries, and more. The syntax for creating and manipulating these data types is integral to Python programming. Note that since 

# List creation
numbers = [1, 2, 3, 4, 5]

# String concatenation
greeting = "Hello, " + name

Functions

In Python, functions are defined using the def keyword, followed by the function name and parameters. Also, the function body/ lines of code must have a consistent indentation. For example-

def add_numbers(a, b):
    return a + b

Conditional Statements

Python uses if, elif (else if), and else for conditional statements. The indentation determines the blocks of code associated with each condition. For example-

if x > 0:
    print("Positive number")
elif x == 0:
    print("Zero")
else:
    print("Negative number")

Loops

Python supports for and while loops. The for loop is often used for iterating over sequences, while the while loop is used for repeated execution based on a condition. For example-

# For loop
for i in range(5):
    print(i)

# While loop
while x > 0:
    print(x)
    x -= 1

Code Sample:

Output:

Sum of numbers: 15

Explanation:

In the Python code above,

  • The calculate_sum function is defined using the def keyword.
  • It takes a list of numbers as a parameter. Inside the function, a variable total_sum is initialized to 0. This variable will be used to store the sum of the numbers.
  • A for loop is used to iterate through each number in the given list (numbers). The indentation indicates the block of code belonging to the loop.
  • Within the loop, each number is added to the total_sum variable. This process repeats for each element in the list.
  • After the loop completes, the function returns the calculated sum (total_sum). An example list of numbers (numbers_list = [1, 2, 3, 4, 5]) is created.
  • The calculate_sum function is called with this list as an argument, and the result is stored in the variable result_sum.
  • The result is printed using the print statement, showing the sum of the numbers in the list.

Python Syntax Vs. Other Programming Languages

Python's syntax differs from many other programming languages in several ways, emphasizing readability, simplicity, and expressiveness. Here are some key differences in Python syntax compared to other languages:

Feature Python Other Languages (e.g., Java, C++)
Whitespace Significance Indentation determines code blocks Braces {} or keywords (begin, end) determine blocks/ bundles of code 
Explicit Variable Declaration No explicit declaration is required Requires explicit type and declaration of variables
Dynamic Typing Dynamically typed Statically typed
Colon and Indentation Colon (:) and indentation define blocks Braces {} or keywords ()
Simplicity and Expressiveness Emphasis on simplicity and expressiveness Syntax may be more verbose
Duck Typing Follows duck typing philosophy Explicit type declarations often required
Semicolons for Line Termination Not required (newline terminates statements) Required to terminate statements on the same line
Extensive Standard Library Comprehensive standard library Standard libraries may vary in coverage

The syntax of languages such as Node.js, Java, and C++ is intricate and requires the user to adhere to particular programming conventions, such as the usage of curly brackets and semicolons at the conclusion of statements. Python, in contrast, lacks such programming conventions. The indentation rules used by Python, are comparable to those of the English language, making it simpler for programmers to grasp.

Why Should You Learn Python?

A comparison between Python and other programming languages

There is no denying the fact that Python is one of the most popular programming languages. Learning this high-level language is an advantageous endeavor for several reasons, including- 

  • Python's readability and simplicity make it an ideal language for beginners, reducing the learning curve and fostering a smooth entry into the world of programming.
  • Its versatility shines through in various domains, from web development using frameworks like Django and Flask to data science and machine learning with libraries such as NumPy and TensorFlow.
  • The extensive support from a vibrant and strong community of developers as well as enthusiasts ensures that learners have access to a wealth of resources and assistance.
  • Python's widespread use in artificial intelligence, automation, and emerging technologies makes it one of the most valuable and in-demand skills in the job market.
  • Its cross-platform compatibility, rapid prototyping capabilities, and educational value further solidify Python as a top choice for both newcomers and seasoned developers seeking a powerful, accessible, and community-driven programming language.

Applications Of Python Language

Some common examples of Python include web development, network programming, games etc.

Python's flexibility is a key benefit and one of the reasons for its extensive use across a variety of industries. There are over 125,000 third-party Python libraries available for users, which significantly increase the capability and potential of the language. Listed below are the key domains and areas where Python is commonly employed.

  • Web Development: Python is widely used for web development and application creation, with frameworks such as Django, Flask, and Pyramid. These frameworks simplify the development of scalable and maintainable web applications.
  • Data Science and Machine Learning: Python has become a dominant language in the field of data science and machine learning. Libraries like NumPy, Pandas, Scikit-learn, TensorFlow, and PyTorch provide powerful tools for data analysis, modeling, and deep learning.
  • Artificial Intelligence and Natural Language Processing (NLP): Python is extensively used in AI and NLP applications. Libraries like NLTK and spaCy are popular for natural language processing tasks, while frameworks like OpenCV and scikit-image are used in computer vision applications.
  • Scientific Computing: Python is a preferred language in scientific research, computing, and a multitude of other science tasks. Its libraries, such as SciPy and Matplotlib, facilitate complex computations, simulations, and data visualization.
  • Automation and Scripting: The simplicity and readability of this general-purpose language make it an excellent choice for automation and scripting. Python scripts are widely used to simplify the process in many operations ranging from automation to system administration.
  • Backend Development: Python is commonly used for backend development and powering server-side web development/ logic in various applications. Web application frameworks like Django and Flask facilitate the creation of robust and scalable backend systems. These frameworks provide pre-built components, reliable routing systems, and database integration, thus making web development simpler. 
  • Game Development: Python is used in game development (for 3D games to more complex video games), both for scripting within game engines and for developing game logic. A notable example of this is Pygame, a set of Python modules designed for writing video games.
  • Desktop GUI Applications: Python can be used for developing desktop applications with graphical user interfaces (GUI). Libraries like Tkinter, PyQt, and Kivy enable the creation of cross-platform desktop application GUIs.
  • Network Programming: Python is well-suited for network programming, with libraries such as Twisted facilitating the development of networking applications, servers, and protocols.
  • Cybersecurity and Penetration Testing: Python is widely used in the field of cybersecurity and penetration testing. Its simplicity, combined with libraries like Scapy and PyCrypto, makes it an excellent choice for security professionals.
  • Internet of Things (IoT): Python's simplicity and versatility make it a popular choice for IoT development. MicroPython, a Python 3 implementation optimized for microcontrollers, is specifically designed for embedded systems.
  • Education: Python is commonly used as the first programming language in educational settings. Its readability and straightforward syntax make it an ideal choice for teaching programming concepts.
  • Finance and Quantitative Analysis: Python is widely adopted in the finance industry for quantitative analysis, risk management, and algorithmic trading. Some of the most commonly used libraries for financial modeling are NumPy and Pandas.
  • Content Management Systems (CMS): Python is used for developing content management systems, and frameworks like Wagtail provide a robust platform for building content-driven websites.

Advantages And Disadvantages Of Python

Graphic showing advantages & disadvantages of Python in short.

When learning a new language like Python, you should be aware of both its advantages and disadvantages. This will provide you with a better understanding of how to use the Python programming language to its full potential. Let's start with Python's benefits and drawbacks.

Advantages Of Python

  • Readability and Simplicity: Python's syntax is clear, readable, and concise, making it an excellent language for beginners and experienced developers alike. The emphasis on code readability encourages maintainability and reduces the cost of program maintenance.
  • Extensive Standard Library: Python comes with a vast standard library that includes modules and packages for a wide range of tasks, from web development and data analysis to artificial intelligence and networking. This feature eliminates the need to write code from scratch for many common tasks.
  • Community and Support: Python has a large and active community of developers. This community contributes to the language's growth and provides support through forums and online communities, thus continually expanding the vast ecosystem of libraries and frameworks.
  • Versatility: Python is a versatile language that supports multiple programming paradigms, including procedural, object-oriented, and functional programming. Its adaptability makes it suitable for a broad spectrum of applications.
  • Interpreted and Interactive: Python is an interpreted language, allowing for quick development and testing. It also supports an interactive mode, where code can be executed line by line, making it an ideal language for prototyping and learning.
  • Platform Independence: Python is a cross-platform language, meaning that code written on one platform can run on multiple platforms without modification. This feature simplifies the development process and enhances code portability.
  • Integration Capabilities: Python can easily integrate with other languages and technologies, making it a popular choice for building applications that involve diverse components. It has robust support for integration with C, C++, and Java.
  • Dynamically Typed: Python is a dynamically typed language, meaning that variable types are interpreted at runtime. This flexibility allows for faster development and makes the language more forgiving.

Disadvantages Of Python

  • Execution Speed: While Python is known for its simplicity and readability, it may not be as fast as languages like C or C++. This can be a drawback in situations where high performance is critical, such as certain computational tasks or real-time applications.
  • Global Interpreter Lock (GIL): Python's Global Interpreter Lock can be a limitation in multithreaded applications, as it restricts the execution of multiple threads at the same time. This can impact the performance of CPU-bound and multithreaded applications.
  • Mobile Development: Python is not the first choice for mobile app development, especially for resource-intensive applications. While frameworks like Kivy and BeeWare exist, they may not offer the same level of support and performance as native mobile development languages.
  • Database Access: Python's database access layers are not as mature as those in some other languages. While there are libraries like SQLAlchemy, some developers argue that database support could be more robust.
  • Design Restrictions: Python's design philosophy may not align with certain projects or coding styles. For example, the emphasis on indentation and whitespace can be a point of contention for developers accustomed to other formatting practices.
  • Limited to GIL in CPython: The Global Interpreter Lock (GIL) in CPython limits the execution of multiple threads. Although this design choice simplifies memory management, it can hinder the performance of multi-core processors in certain scenarios.

Also read- 20+ Best Python Projects Ideas

Some Useful Python Tips & Tricks For Efficient Programming

When writing code from scratch, a developer's life can be greatly simplified by Python's minimalism. However, there are several lesser-known Python techniques that may sway you with their incredible power. In this section, we’ll discuss useful tricks that can help you write short, meaningful codes in Python.

1. Value Swapping: In Python, you can change the values of two variables without using a temporary variable with a straightforward one-liner. 

Code:

Output:

10 5

Explanation:

In the example above, the one-liner (a, b = b, a) swaps the values of a and b. The values are then assigned to a and b on the right-hand side, which first produces a tuple (b, a) before unpacking it. The values of a and b are consequently switched.

2. Reversing a String: You can reverse a string in Python using slicing with a step of (-1).

Code:

Output:

"!dlroW ,olleH"

Explanation:

Here, the string is reversed using the [::-1] slicing operation. It reverses the letters' order by beginning at the end of the string and moving backward by -1.

3. List Comprehensions: List comprehensions allow you to create concise lists based on existing lists or other iterable objects.

Code:

Output:

[1, 4, 9, 16, 25]

Explanation:

Here, a new list is created by square rooting each number in the range of 1 to 5 using the list comprehension [x**2 for x in range(1, 6)].

4. Unpacking Elements: In Python, it's simple to split out the elements of a list or tuple into independent variables.

Code:

Output:

1 2 3

Explanation:

Here, the elements of the list [1, 2, 3] are unpacked into individual variables a, b, and c. And each variable is assigned the corresponding value from the list.

5. Enumerate: You may loop through an iterative using the enumerate() method in Python, to get the index and value of each element.

Code:

Output:

0 a
1 b
2 c

Explanation:

In the example above, we iterate over my_list using the enumerate() method, which returns the index and value of each item. While the index variable keeps the element's index, the value variable preserves the pertinent value.

6. Zip: The zip() function in Python combines multiple iterables into a single iterable of tuples, grouping corresponding elements together.

Code:

Output:

[(1, 'a'), (2, 'b'), (3, 'c')]

Explanation:

In the Python program here, the zip() function's List1 and List2 elements are concatenated into tuples. The corresponding items are matched up in the resultant tuples. You can see the tuples as the result by converting the zip object to a list.

Python 2 Vs. Python 3: Which Should You Learn?

Which is better- Python2 or Python3?

The obvious choice for any developer who is starting to learn how to program in Python is Python 3. The language has undergone modifications that make it simpler to produce high-quality code. This is the primary motivation behind the version's creation. The Python community merely needed some time to catch up and update all the third-party libraries that programmers relied on to complete their work.

Most of these third-party libraries were not updated to Python 3 for quite a few years. However, compared to the earlier version, Python 3 is now supported by a wider range of libraries. Additionally, Python 2 is no longer being developed as of the start of 2020. The last version of Python 2 had been in maintenance mode for years by then, and all its new features were added to Python 3. For the most part, you won’t find much Python 2 code in use today.

Now, let us take a look at some key differences between these two languages.

Python 2

Python 3

It is the more stable and transparent version of the Python programming language.

It is the future of Python, created to address the design flaws in the previous versions.

The print syntax is treated as a statement rather than a function, which requires text to be wrapped in parenthesis. E.g., print "Hello"

The print is explicitly treated as a function and replaced by the print() function in Python 3, which requires an extra pair of parenthesis. E.g., print("Hello")

ASCII string type is used by default to store strings.

Unicode is the implicit string type by default.

It simply returns an integer to the nearest whole number when dividing two integers.

It makes integer division more intuitive by using true division for integers and floats

Xrange function reconstructs the sequence every time.

Xrange is replaced by the range() function in Python 3.

Python Libraries

List of 10 important Python libraries.

The Python libraries refer to a group of connected modules that further have collections of code that may be reused in many programs. For the programmer, it simplifies and makes Python programming more practical to use. This is because, with the use of libraries, we don't have to develop the same code for many programs repeatedly. Python libraries are particularly important when working in domains like machine learning, data science, data visualization, etc.

Here’s a list of the most commonly used Python libraries:

1. NumPy:

Purpose: It is used for numerical computing.

Description: NumPy is a fundamental library for numerical operations in Python. It provides support for large, multi-dimensional arrays and matrices, along with mathematical functions to operate on these arrays.

Example:

2. Pandas:

Purpose: It is mainly used for data manipulation and analysis.

Description: Pandas is a powerful library for data manipulation and analysis. It introduces data structures like DataFrames and Series, making it easy to clean, transform, and analyze structured data.

Example:

3. Matplotlib:

Purpose: It is used in the area of data visualization.

Description: Matplotlib is a versatile library for creating static, animated, and interactive visualizations in Python. It provides a wide range of plotting functions for various types of charts (like bar charts, pie charts, etc.).

Example:

4. Scikit-learn:

Purpose: It is primarily used in the field of machine learning.

Description: Scikit-learn is a machine-learning library that provides simple and efficient tools for data mining and data analysis. It includes various algorithms for classification, regression, clustering, and more.

Note: To run the code provided below, you need to install the scikit-learn module using a package manager like pip. Open a terminal or command prompt and run the following command:

pip install scikit-learn

This will install the scikit-learn library, and you should be able to run your code after the installation is complete.

Example:

5. TensorFlow and PyTorch:

Purpose: It is used in deep learning and related domains.

Description: TensorFlow and PyTorch are leading libraries for developing and training deep neural networks. They provide a flexible platform for building complex neural network architectures and are widely used in research and industry.

Note: To run the code provided below, you need to install the TensorFlow module using pip. Open a terminal or command prompt and run the following command:

pip install tensorflow

This will install the TensorFlow library, and you should be able to run your code after the installation is complete. 

Note: To run the code provided below, you need to install the Flask module using pip. Open a terminal or command prompt and run the following command:

pip install flask

This will install the Flask library, and you should be able to run your Flask application after the installation is complete.

Example:

6. Flask and Django:

Purpose: It is used widely in web development.

Description: Flask and Django are popular web development frameworks. Flask is a lightweight micro-framework, while Django is a more comprehensive framework with built-in features like an ORM, admin interface, and authentication.

Example:

Conclusion

In conclusion, Python's widespread adoption can be attributed to its simplicity, readability, versatility, and a thriving community. It provides a solid foundation for a wide range of applications, irrespective of whether you're a beginner learning to code or an experienced developer working on complex projects. Python has proven to be a language that has not only stood the test of time but has also emerged as a linchpin in the ever-evolving realms of web development, data science, artificial intelligence, machine learning, and beyond.

As technology continues to evolve, Python is likely to remain a dominant force in the programming world, supporting innovation across various domains. For careers in software development, engineering, DevOps, machine learning, data analytics, web development, and testing, Python is a fantastic choice. 

Frequently Asked Questions

Q. What is Python used for?

Python is frequently used for creating websites, operating systems, and applications, automating repetitive tasks, and analyzing and displaying data. Python has been used by many non-programmers, including accountants and scientists, for a range of routine activities like managing finances. This is primarily because Python is simple to learn and closely resembles human language.

Q. What is Python, with an example?

Python is a computer programming language that is frequently used to create software and websites, automate processes, and do data analysis. Because Python is a general-purpose  programming language, it can be used to develop a wide range of programs and isn't tailored for any particular task. It has become one of the go-to languages for many thanks to its versatility and beginner-friendliness. It is also a dynamically typed and garbage-collected programming language.

Here is an example of a Python code snippet-

Output:

The area of the rectangle is: 15

Explanation:

  1. In the example, we first declare the length and width of the rectangle and assign value to them.
  2. Next, we calculate the area of a rectangle by multiplying the given length and width.
  3. The result is then displayed using the print() function.

Q. Is Python easy to write or hard?

Python is frequently considered as one of the simplest, interpreted, object-oriented, high-level programming languages to learn for novices. This language is a wonderful place to start if you're interested in learning a programming language and polish your programming skills.

Q. Is Python good for a career?

For those prepared to dedicate many hours to honing their programming abilities, being a Python developer is one of the best employment options. The need for a Python developer in organizations across industries is essentially inescapable, given how valuable technological integration has become over time.

Q. How many hours to learn Python?

If you're a beginner and want to learn Python in less than two months, you'll need to devote a full-time schedule to your studies. If you study for 40 hours a week, it can take you about 250 hours to develop your Python skills correctly.

Learning the fundamentals of Python programming, including object-oriented programming, fundamental Python syntax, data types, loops, variables, and functions, can take anywhere between five and ten weeks on average. The amount of programming language, web development, data science, and other related experience you have will ultimately determine how long it takes you to learn Python.

Q. What are Python's basics?

The simple syntax of Python is straightforward and resembles the English Language closely. Python's syntax differs from various other powerful programming languages, and it enables programmers and software developers to construct programs with fewer lines of code. Python operates on an interpreter system, allowing for the immediate execution of written code. As a result, prototyping in Python may proceed quickly.

Q. What is a data type in Python?

The data types in Python, like all other programming languages, refer to the type of data stored in the variables. In other words, it specifies the kind of information that will be kept in a variable. Numerous different sorts of data types can be used in a program and kept in the memory.

For instance, a person's address is kept as a string of alphanumeric letters, while their age is recorded as a numeric number. Also, Python is a dynamically typed language, meaning that the variable type is assigned at runtime. The built-in or standard data types in Python include-

  • Numeric
  • Sequence Type
  • Boolean
  • Set
  • Dictionary
  • Binary Types( memoryview, bytearray, bytes)

By now, you must know what Python is and why it is so popular amongst programmers. Here are a few other interesting topics you must read-

  1. Difference Between C and Python | C or Python - Which One Is Better?
  2. 10 best Python IDE to develop world-class software and application
  3. Difference Between Java And Python Decoded
  4. 10 Important Features Of Python That You Must Know!
  5. Best Python Books For Beginners, Intermediates And Experts
Edited by
Shivani Goyal
Manager, Content

I am an economics graduate using my qualifications and life skills to observe & absorb what life has to offer. A strong believer in 'Don't die before you are dead' philosophy, at Unstop I am producing content that resonates and enables you to be #Unstoppable. When I don't have to be presentable for the job, I'd be elbow deep in paint/ pencil residue, immersed in a good read or socializing in the flesh.

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Computer Science Engineering

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