Using the append function in Python

The append() function in Python is a method used to add elements to the end of a list. In many cases, we need to continuously add new elements to the list, then we can use the append() method. Below, I will introduce the usage of append() in detail and provide some specific code examples.

First of all, let us understand the basic syntax of append():

list.append(obj)

Among them, list represents the name of the list to be operated on, and obj represents the element to be added.

The operation of the append() method is very simple, which is to add the passed in element to the end of the list. When we call the append() method, the passed in element will be added to the last position of the list without affecting the position of other elements. This feature makes the append() method very convenient when adding a single element.

The following are some specific code examples to help you better understand the usage of append().

Example 1: Adding integers to a list

numbers = [1, 2, 3, 4, 5]
numbers.append(6)
print(numbers)

Output:

[1, 2, 3, 4, 5, 6]

In this example, we define a list named numbers and use append() Method adds the integer 6 to the list. The final output result is [1, 2, 3, 4, 5, 6]. You can see that 6 is successfully added to the end of the list.

Example 2: Adding a string to a list

fruits = ['apple', 'banana', 'orange']
fruits.append('watermelon')
print(fruits)

Output:

['apple', 'banana', 'orange', 'watermelon']

In this example, we define a list named fruits and use append( ) method adds the string 'watermelon' to the list. The final output result is ['apple', 'banana', 'orange', 'watermelon']. You can see that 'watermelon' is successfully added to the end of the list.

Example 3: Add a list to a list

list1 = [1, 2, 3]
list2 = [4, 5, 6]
list1.append(list2)
print(list1)

Output:

[1, 2, 3, [4, 5, 6]]

In this example, we define two lists list1 and list2, and then pass append() The method adds list2 as the entire list to the end of list1. The final output result is [1, 2, 3, [4, 5, 6]]. You can see that the entire list2 is successfully added to the end of list1.

It should be noted that the append() method can only add one element at a time. If you want to add multiple elements, you need to call the append() method multiple times. In addition, when using the append() method to operate a list, the original list will be directly modified instead of creating a new list.

To sum up, the append() method in Python is a very practical function for adding elements to the end of the list. Whether you are adding a single element or an entire list, you can easily do so with the append() method. I hope the above code examples can help you better understand and use the append() method.

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