A quick yet complete tour of lists in Python3 in just seven minutes.Python lists are not like arrays. They are bit different. When it comes to dealing with array’s we talk about a collection of homogeneous data elements.
This is not true in case of a list in python. Python List can store a heterogeneous collection of elements. This feature will help developers and programmers to work with lists in a more flexible manner. A List in python is one of the most powerful inbuilt data structures.
Lists in python can store Integers, Floating values, Strings, Boolean values, and complex values as well.
We can create a list in python in two ways
# Here first I'm creating a my todo list which is used to store my to-do activities. myTODOList =  # The above line will create a list object for me # I'm creating a another list which will store my general information. myGeneralInfo = list() # The above line will also create a list object for me # Getting the types of list objects print(type(myTODOList)) print(type(myGeneralInfo))
It’s amazing at this point you are able to create a new list object with most frequently used methods. Now we will move forward on how we can add new elements to our list and many more things. Let’s get started.
First of all, I would like to introduce the concept of Mutability. Mutability means the ability to change its behavior. Python lists are mutable in nature. We can add or delete elements from the list. This is one of the biggest advantages that attract programmers to work with lists when compared to other inbuilt data structures.
We can add elements to a list in two ways:
By using append()
With the help of the append method, we are able to add one element at a time. This method will help us to add elements at the end of the list only.
The syntax for the append function is —
# Adding Elements to the lists myTODOList.append('Wake up Early Morning') myTODOList.append('Go to Gym') myTODOList.append('Play Some Games') myTODOList.append('Get ready to go the college') myTODOList.append('Go to library') # Printing the entire list elements print(myTODOList)
By using insert()
This insert method is used to add the elements at a specified position in the given list.
The syntax for the insert function is —
insert() uses two parameters — position and list item. The position is where the element is needed to be kept in the list. These positions are generally called as indexes. Usually, the list index in python starts from 0. (i.e the first element index is 0 and the second element is 1 and the third element index is 2 and so on). From this, we can conclude that —
A list of n elements will have at most an index number of n-1 i.e A list with 5 elements will have maximum index value of 4.
# Adding Elements to our list with the help of insert() myGeneralInfo.insert(0, 'Paid the Library Fee') myGeneralInfo.insert(1, 12000) myGeneralInfo.insert(2, True) myGeneralInfo.insert(3, 14+12j) myGeneralInfo.insert(4, 3.141521) # Printing the myGeneralInfo list information print(myGeneralInfo)
myGeneralInfo is filled with some random information for illustration purposes only.
We can access the list of elements by using the following two ways:
By using an index operator
We can directly access our list elements with the help of the index operator.
# Acessing the certain values from the list print(myTODOList) print(myTODOList) print(myTODOList)
By using Slice Operator
The slice operator is one of the most commonly used operators to access the list elements effectively. The syntax for the slice operator is:
listName[start: stop: step]
start — It indicates the index where the slice has to start. The default value is 0.
stop — It indicates the index where the slice has to end. The default value is the maximum allowed index of list i.e. length of the list.
step — Increment value. The default value is 1.
# Getting the information using slice operator print(myTODOList[0:3]) # we don't need to specify the step value. print(myTODOList[2:4:1]) print(myTODOList[0:4:2])
Python lists are iterable objects. For any iterable object in python, we can write a for loop to print out all the data.
# Iterating over the list for item in myGeneralInfo: print(item)
We can remove the list elements with the following two ways:
By using remove()
remove() is used to remove the element that is specified to it. The syntax for remove() is:
# Deleting the element from the list myGeneralInfo.remove(12000) myGeneralInfo.remove('Paid the Library Fee') # printing the result after deleting the elements print(myGeneralInfo)
By using pop()
It is an iterator method which is used to remove the single (or) multiple elements at a time. It deletes the elements from the back side. The syntax for the pop() method is:
# printing the list items before deleting print('My TODO List Elements: ',myTODOList) print('My General list Elements: ',myGeneralInfo) # Deleting the list elements using pop() myTODOList.pop() myTODOList.pop() # Deleting the list elements completely for item in range(len(myGeneralInfo)): myGeneralInfo.pop() # printing the results print('My TODO List Elements: ',myTODOList) print('My General list Elements: ',myGeneralInfo)
In the above program, we used the len() within the for loop. len() is used to give the length of the list i.e. number of elements present in the list.
python dir() function is used to give the set of inbuilt attributes and methods that are associated with it.
# Printing all the attributes and functions on the list object print(dir(myTODOList))
If you want to store multiple data objects, insertion order must be preserved. If you want to store duplicate values as well, then this data structure will be more helpful to perform such operations.
I covered pretty much everything that is required to perform any kind of operation on the list data structure.
Hope this helped you learn about Lists in python in a quick and easy way.
If you liked this article, please click on the clap and leave me feedback. Please share with your friends.
Python GUI Programming Projects using Tkinter and Python 3
Learn Hands-On Python Programming By Creating Projects, GUIs and Graphics
Python is a dynamic modern object -oriented programming language
It is easy to learn and can be used to do a lot of things both big and small
Python is what is referred to as a high level language
Python is used in the industry for things like embedded software, web development, desktop applications, and even mobile apps!
SQL-Lite allows your applications to become even more powerful by storing, retrieving, and filtering through large data sets easily
If you want to learn to code, Python GUIs are the best way to start!
I designed this programming course to be easily understood by absolute beginners and young people. We start with basic Python programming concepts. Reinforce the same by developing Project and GUIs.
The Python coding language integrates well with other platforms – and runs on virtually all modern devices. If you’re new to coding, you can easily learn the basics in this fast and powerful coding environment. If you have experience with other computer languages, you’ll find Python simple and straightforward. This OSI-approved open-source language allows free use and distribution – even commercial distribution.
When and how do I start a career as a Python programmer?
In an independent third party survey, it has been revealed that the Python programming language is currently the most popular language for data scientists worldwide. This claim is substantiated by the Institute of Electrical and Electronic Engineers, which tracks programming languages by popularity. According to them, Python is the second most popular programming language this year for development on the web after Java.
Python Job Profiles
The median total pay for Python jobs in California, United States is $74,410, for a professional with one year of experience
Below are graphs depicting average Python salary by city
The first chart depicts average salary for a Python professional with one year of experience and the second chart depicts the average salaries by years of experience
Who Uses Python?
This course gives you a solid set of skills in one of today’s top programming languages. Today’s biggest companies (and smartest startups) use Python, including Google, Facebook, Instagram, Amazon, IBM, and NASA. Python is increasingly being used for scientific computations and data analysis
Take this course today and learn the skills you need to rub shoulders with today’s tech industry giants. Have fun, create and control intriguing and interactive Python GUIs, and enjoy a bright future! Best of Luck
Who is the target audience?
Anyone who wants to learn to code
For Complete Programming Beginners
For People New to Python
This course was designed for students with little to no programming experience
People interested in building Projects
Anyone looking to start with Python GUI development
Access to a computer
Download Python (FREE)
Should have an interest in programming
Interest in learning Python programming
Install Python 3.6 on your computer
What will you learn
Build Python Graphical User Interfaces(GUI) with Tkinter
Be able to use the in-built Python modules for their own projects
Use programming fundamentals to build a calculator
Use advanced Python concepts to code
Build Your GUI in Python programming
Use programming fundamentals to build a Project
Signup Login & Registration Programs
Job Interview Preparation Questions
& Much More
Guide to Python Programming Language
The course will lead you from beginning level to advance in Python Programming Language. You do not need any prior knowledge on Python or any programming language or even programming to join the course and become an expert on the topic.
The course is begin continuously developing by adding lectures regularly.
Please see the Promo and free sample video to get to know more.
Hope you will enjoy it.
An Enthusiast Mind
Basic Knowledge To Use Computer
What will you learn
Will Be Expert On Python Programming Language
Build Application On Python Programming Language
Python Programming Tutorials For Beginners
Hello and welcome to brand new series of wiredwiki. In this series i will teach you guys all you need to know about python. This series is designed for beginners but that doesn't means that i will not talk about the advanced stuff as well.
As you may all know by now that my approach of teaching is very simple and straightforward.In this series i will be talking about the all the things you need to know to jump start you python programming skills. This series is designed for noobs who are totally new to programming, so if you don't know any thing about
programming than this is the way to go guys Here is the links to all the videos that i will upload in this whole series.
In this video i will talk about all the basic introduction you need to know about python, which python version to choose, how to install python, how to get around with the interface, how to code your first program. Than we will talk about operators, expressions, numbers, strings, boo leans, lists, dictionaries, tuples and than inputs in python. With
Lots of exercises and more fun stuff, let's get started.
Download free Exercise files.
Who is the target audience?
First time Python programmers
Students and Teachers
IT pros who want to learn to code
Aspiring data scientists who want to add Python to their tool arsenal
Students should be comfortable working in the PC or Mac operating system
What will you learn
know basic programming concept and skill
build 6 text-based application using python
be able to learn other programming languages
be able to build sophisticated system using python in the future