What’s the Difference Between the Python append() and extend() Methods?
Question
What’s the Difference Between the Python append() and extend() Methods?
Solution
The Python append() and extend() methods are used to add elements to a list. However, there is a difference between the two methods.
-
append() method:
- The append() method is used to add a single element to the end of a list.
- It takes one argument, which is the element to be added.
- The element is added as a single item to the list.
-
extend() method:
- The extend() method is used to add multiple elements to the end of a list.
- It takes an iterable as an argument, such as a list, tuple, or string.
- The elements of the iterable are added individually to the list.
Here is an example to illustrate the difference:
# Using append() method
my_list = [1, 2, 3]
my_list.append(4)
print(my_list) # Output: [1, 2, 3, 4]
# Using extend() method
my_list = [1, 2, 3]
my_list.extend([4, 5, 6])
print(my_list) # Output: [1, 2, 3, 4, 5, 6]
In the first example, the append() method adds the element 4 as a single item to the list. In the second example, the extend() method adds each element from the iterable [4, 5, 6] individually to the list.
In summary, the append() method adds a single element to the end of a list, while the extend() method adds multiple elements from an iterable to the end of a list.
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