In This Article You Will Learn About Python List Methods
Python List Methods – Before moving ahead, let’s take a look of Introduction to Python List
List Methods – Python has a set of built-in methods that can be used on lists.
count() method – It returns the number of specified value.
Syntax - list.count(value) Parameter values - It is required argument and takes letter or word which is to be counted.
Example 23- Use of count() method to count specified value.
x = 'language'
z = x.count('a')
print(z)
index() method – It returns the index number of first occurrence element with the specified value.
| H | E | L | L | O |
| 1 | 2 | 3 | 4 | 5 |
Syntax - list.index(value) Parameter Values - It is required argument and takes element which is to be indexed
Example 24- Use of index() method to get index number of particular letter.
x = ['a', 'b', 'c', 'd']
print(x.index('c'))
reverse() method – It reverse the order of list. For example – first element will shift to end and last element will come first.
Syntax - list.reverse() Parameter Values - No parameter values.
Example 25- It reversed order of list.
x = ['a', 'b', 'c', 'd']
print('before reversing:' , x)
x.reverse()
print("after reversing:" , x)
sort() method – It arranged list in ascending order by default.
Syntax - list.sort(reverse = True|False) Parameter Values - It is optional argument. By default, it will sort list in ascending order, otherwise reverse =True will sort in descending order.
Example 26- Use of sort() method to sort the list in Ascending order.
x = [2 , 5 , 1 , 3]
print("before sort:", x)
x.sort()
print("after sort", x)
Example 27- Use of sort() method to sort the list in descending order.
x = [2 , 5 , 1 , 3]
print("before sort:" , x)
x.sort(reverse=True)
print("after sort" , x)
If you find anything incorrect in the above-discussed topic and have any further questions, please comment down below.
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