What is Python?
Python’s simplicity, readability, and versatility make it an excellent choice for beginners and experienced programmers alike. In this article, we’ve covered the basics of Python, from setting up your environment to writing your first program and understanding syntax, control flow, and functions. As you continue your journey with Python Basics, don’t hesitate to explore its vast ecosystem of libraries, frameworks, and tools to unleash its full potential in various domains of programming.
Python is a widely used general-purpose, high level programming language. It was created by Guido van Rossum in 1991 and further developed by the Python Software Foundation. It was designed with an emphasis on code readability, and its syntax allows programmers to express their concepts in fewer lines of code.
Python is a programming language that lets you work quickly and integrate systems more efficiently.
There are two major Python versions: Python 2 and Python 3. Both are quite different.
Rules for Python variables
- A Python variable name must start with a letter or the underscore character.
- A Python variable name cannot start with a number.
- A Python variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ ).
- Variable in Python names are case-sensitive (name, Name, and NAME are three different variables).
- The reserved words(keywords) in Python cannot be used to name the variable in Python.
What are the key features of Python?
· Python
is an interpreted language. That means that, unlike languages like C and its
variants, Python does not need to be compiled before it is run. Other
interpreted languages include PHP and Ruby.
· Python
is dynamically typed, this means that you don’t need to state the types of
variables when you declare them or anything like that. You can do things like
x=111 and then x="I'm a string" without error
· Python
is well suited to object oriented programming in that it allows the definition
of classes along with composition and inheritance. Python does not have access
specifiers (like C++’s public, private).
· In
Python, functions are first-class objects. This means that they can be assigned
to variables, returned from other functions and passed into functions. Classes
are also first class objects
· Writing
Python code is quick but running it is often slower than compiled languages.
Fortunately，Python allows the inclusion of C-based
extensions so bottlenecks can be optimized away and often are. The numpy
package is a good example of this, it’s really quite quick because a lot of the
number crunching it does isn’t actually done by Python
· Python
finds use in many spheres – web applications, automation, scientific modeling,
big data applications and many more. It’s also often used as “glue” code to get
other languages and components to play nice.
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