Last Updated on April 28, 2023 by Prepbytes
In Python, a list is a built-in data structure that allows for storing an ordered sequence of elements. One of the fundamental operations when working with lists is adding new elements to the end of an existing list. The Python list append() method is a built-in method that provides a straightforward way to accomplish this task. This article discusses the Python List append() method, the syntax of the append method in Python, and some examples of the Python List append() method.
What is append Method in Python?
Python list append() method is a built-in method that is used to add elements to the end of an existing list. The append() method modifies the original list in place, which means that it adds the new element(s) to the end of the list without creating a new list object.
The append method in Python takes a single argument, which is the element that you want to add to the list. The element can be of any data type, including strings, numbers, or other objects. If you want to add multiple elements to the list, you can call the append() method multiple times.
It is important to note that the append() method adds new elements to the end of the list, so the order of the original list is preserved. If you need to add elements to a list at a specific position, you can use other list methods such as insert() or extend().
Syntax of Python List append() Method
The syntax of the append method in Python is as follows:
list_name.append(element)Here, list_name is the name of the list that you want to add the element(s) to, and element is the element that you want to add to the list. The append method in Python adds the element to the end of the list_name.
Return Value of Python List append() Method
The Python List append() method does not return any value. It modifies the original list by adding the specified element(s) to the end of the list.
Since the append method in Python does not return any value, you cannot use it in expressions or assign its output to a variable. If you try to assign the result of the append() method to a variable, you will get a NoneType object.
Examples of Python List append() Method
Here are a few examples of how to use the append() method in Python:
Example 1
In this example, we are taking a list of( string datatype) and we simply use the append method in Python to append another element which is (“college Dekho”) string.
Code Implementation:
# your code goes here
# your code goes here
our_list=["prep","bytes"]
our_list.append("college Dekho")
print(our_list) Output:
['prep', 'bytes', 'college Dekho']Explanation:
In the above Python program, we have a list and the name of the list is ‘our_list’ if we observe the list that it consists of two elements of the string(data type). One is “prep” and another is “bytes”. Now we add another string, "college Dekho” so we use the append function, which adds this string at the end of our list(our_list).
After this, we print the (our_list) and we observe on the output screen that the string ( “College Dekho”) has been added at the end of the list(our_list).
Example 2
In this example, we have taken 2 lists and appended one list to another by using the append method in Python.
Code Implementation:
# your code goes here orginal_list=["college","dekho"] other_list=[1,2,3] orginal_list.append(other_list) print(orginal_list)
Output:
['college', 'dekho', [1, 2, 3]]Explanation:
In the above Python program, we have two lists. List 1 name as orginal_list and list2 name as other_list, if we observe that list1 consists only of string elements which are (“college”, “Dekho”) and list2 which have integer values (1,2,3).so this is an example of a nested list in which we add one list into another by using the append function we simply pass the other_list as an argument in append() function. after this, we print the original list.
On output, we observe the (other_list) added at the end of the original list.
Conclusion
In conclusion, the Python List append() is a built-in method that allows you to add elements to the end of a list. It modifies the original list in place and does not return any value. You can add a single element or multiple elements to a list using the append method in Python, and you can use it in a loop to build a list dynamically. The Python List append() method is one of the most commonly used list methods in Python.
FAQs on Python List append() Method
Here are some frequently asked questions on append method in Python.
Q1: What is the difference between the extend method and the append method in Python?
Ans: The append() method adds a single element to the end of a list, while the extend() method takes an iterable as an argument and adds each element of the iterable to the end of the list.
Q2: Can I append an element to a list if it already exists in the list?
Ans: Yes, you can append an element to a list even if it already exists in the list. This will create a duplicate element in the list.
Q3: Can I append a tuple to a list using the Python List append() method?
Ans: Yes, you can append a tuple to a list using the Python List append() method. The tuple will be added as a single element at the end of the list.
Q4: Can I append a list to a list using the append method in Python?
Ans: Yes, you can append a list to a list using the Python List append() method. The entire list will be added as a single element at the end of the original list.
Q5: Can I append a None value to a list using the append method in Python?
Ans: Yes, you can append a None value to a list using the Python List append() method. The None value will be added as a single element at the end of the original list.
Q6: Can I append a dictionary to a list using the append method in Python?
Ans: Yes, you can append a dictionary to a list using the Python List append() method. The dictionary will be added as a single element at the end of the list.
Q7: Can I append a set to a list using the append method in Python?
Ans: No, you cannot append a set to a list using the Python List append() method because sets are not iterable in Python.