How To Code In Python | Python For Beginners | Python Coding Tutorial | Python Training | Edureka
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Introduction to Python Programming
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Hello everyone, this is Vaseen from Edureka and I welcome you all to this session in which I am going to discuss how to code in Python. Let's take a look at the agenda for this session:
Installation and setup
Python interactive shell
Using IDEs for Python
Writing your first Python code
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Installation and Setup
As a beginner, the first thing you have to do while starting with Python programming language is to install and set up Python on your system. Python is an interpreted language, open-source, easy to learn, and has a lot of libraries. However, installation and setup can be a bit tricky.
You have to download the appropriate file from the official documentation depending on your operating system. Then, you will have to install it using the setup, which requires setting the path manually or using the option in the setup. You also have to choose the appropriate Python version for your system, either Python 2 or Python 3.
To download Python, go to python.org and select the appropriate download section for your operating system. Latest Python 3 releases are Python 3.9.0, while latest Python 2 releases are Python 2.7.18. After downloading the appropriate Python version, you can install it on your system using the executable installer.
Once you have installed Python, open the command prompt and type 'python'. If everything went well and your path is set correctly, you will enter the Python interactive shell.
Python Interactive Shell
The Python interactive shell is a command-line interface that allows you to interact with Python code directly. It is a great way to test small pieces of code, experiment with new features, and debug code. To enter the Python interactive shell, open the command prompt and type 'python'.
Using IDEs for Python
Python comes with IDLE, which is an IDE for Python that comes with the installation. However, there are several other IDEs like PyCharm, VS Code Editor, Sublime Text, and Jupiter from Anaconda that you can explore. As a beginner, it is recommended to start with IDLE and then move on to other IDEs as you gain more experience.
Writing Your First Python Code
Python is an easy language to learn with a good documentation that comes with beginner guides and developer guides. As a beginner, you should start with learning the basic concepts like variables, data structures, syntax, functions, and classes. Once you have a good grasp of these concepts, you can move on to advanced concepts like data analysis, machine learning, and deep learning.
In summary, Python is an easy-to-learn language with a lot of libraries that can help you with various tasks. Installation and setup can be a bit tricky, but once you have installed it correctly, you can use the Python interactive shell to test your code. As you gain more experience, you can move on to other IDEs and advanced concepts.
As a beginner learning Python, the first thing you need to know is the "Hello World" command. This is your gateway to learning any programming language. If you don't know how to print "Hello World," then you have missed a crucial part of the language.
Python's interactive shell allows you to execute commands one at a time. However, for more complex programming, you will need to use a text editor. Python's Integrated Development Environment (IDE) is called IDLE, which allows you to write full Python scripts.
Approaching Python Code
When writing Python code, it's important to first identify the problem statement. Determine what task the program needs to perform and what data types are required. A simple example would be to put ten numbers into a data structure. In this case, you need to decide which data structure to use and in which format to store the numbers.
Another example is calculating the factorial of a number. To do this, you need to multiply the number by itself until you reach the result. This involves the concept of iteration, which is executing the same code repeatedly until a certain point is reached.
Using a Text Editor
Now that we've discussed the approach to writing Python code, let's look at using a text editor. We can use a list constructor to create an empty list and the range data type to generate ten numbers to add to the list. Here's an example:
a = list(range(0, 11, 1))print(a)
This code creates a list of ten numbers from 0 to 10. You can save this code as a Python script using a text editor and run it from the command line.
Another example is checking if a number is less than, greater than, or equal to ten. Here's the code:
num = int(input("Enter a number: "))if num == 10: print("Equal")elif num > 10: print("Greater")else: print("Less than")
This code prompts the user for a number and checks if it is less than, greater than, or equal to ten. You can save this code as a Python script and run it from the command line.
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