-List Slicing in Python-

List Slicing :

Slicing helps in creating a new list from an existing list.

Syntax list_name [start:end:step]

Suppose you have a list of Avengers, arranged in the order of your preference.

avengers=[“Iron Man”,”Thor”,”Hulk”,”Spider Man”,”Captain America”,”Black Panther”,”Hawk Eye”,”Vision”,”Black Widow”]

Later you decide to split them into a separate list like

favourite=[“Iron Man”,”Thor”,”Hulk”]

less_favourite =[”Spider Man”,”Captain America”,”Black Panther”]

least_favourite=[”Hawk Eye”,”Vision”,”Black Widow”]

Now, we have 3 lists formed from the main list. Would you want to create these lists again from the beginning? This is where list slicing helps us.

Here is the code to Get the last few elements of a list.

code to Get the first few elements of a list.

code to Get the numbers within a range.

code to Get elements within a range using the step.

code to Get the reverse list.

Creating the list of our favorite avengers in the order of preference.

Note: Below slicing will work only if the original list contains 9 elements

Creating a list of favorite avengers from it and print it. (assuming the first 3 are the most favorites)

Creating another list of avengers who are less favorite than the above. (assuming the middle 3)

Create a list of least favorite avengers (last 3)

Creating a list containing every second avenger from the main list.

Printing the main avenger's list in reverse ie from least favorite to most favorite.

Comments

- Object Oriented Programming -

In OOP, we can represent an entity using a class. A class bundles data (features/properties of entity - color, height, width) and functionality (movement, expression) together. An instance of a class is known as an object. Which is the only cartoon series that had predicted that Trump would be elected as the president of the USA and also predicted the coronavirus spread? Answer: Simpsons. Simpsons is a very popular animated show. You can build something similar with python. But have you ever wondered, how Simpsons look the same in all the series? Only his movement looking and, expression change but his main features like color, height, and face look exactly the same all the time. This is because we create a ‘blueprint’ of Simpsons and whenever we have to simulate him on screen we use this blueprint. This keeps a record of all the features of Simpsons and recreates it whenever we want. This is where Object-Oriented Programming(OOP) h...

- Animating characters using pygame -

If you see closely you can see that the mickey mouse animation is made out of a lot of shapes. But to create something like this we need to make a very complex code. The other way around it is to use an image, other than the basic shapes, pygame also can show images. Using images : Steps to use images in my game: > find the image you want to use > move it to the directory where you have created your code > import/load image To load the image we will first create an object and then use the image. load method to add the image to the object. here, we have created an object called an image. We then use the "pygame.image.load" to find the file in the directory ocean.png has to be replaced with the filename of your file. To place the object on a particular point of the screen we use the blit function. this function means that we are going to add the image onto the screen at position 0,0 mickey mouse is winking Usi...

- Quiz game in Python -

Game Overview ● Questions are stored in a file. We will have to read it from the file and store it in a dictionary. ● 2 points for the correct answer and -1 point for the wrong answer ● Max no. of questions asked:5 ● Questions will be shuffled once and then asked sequentially. File Template (for the program) Each question in the file is stored as <Question> : <Answer> Here ‘:’ acts as a separator between question and answer. Each line read from the file will be of string data type. ‘:’ helps in separating the answer from the question. Note: Make sure you add a ‘:’ between question and answer if adding a question manually. Algorithm Now that you have seen how the quiz game works, Let's have look at the algorithm for the same. 1. Read the entire file 2. From each line read, get the question and answer a. Add to dictionary 3. Print the rules of the game 4. Shuffle the questions 5. Get eac...

Python for kids and beginners with example code in fun and unique way.

Search This Blog