Extract String Elements from Mixed Matrix in Python

When it is required to extract string elements from mixed matrix, a list comprehension and the ‘isinstance’ method is used.

Example

Below is a demonstration of the same −

my_list = [[35, 66, 31], ["python", 13, "is"], [15, "fun", 14]]

print("The list is :")
print(my_list)

my_result = [element for index in my_list for element in index if isinstance(element, str)]

print("The result is :")
print(my_result)

Output

The list is :
[[35, 66, 31], ['python', 13, 'is'], [15, 'fun', 14]]
The result is :
['python', 'is', 'fun']

Explanation

• A list of list is defined and displayed on the console.

• A list comprehension is used to iterate over the elements in the list.

• The ‘isinstance’ method is used to check if the elements in the list of list belong to a specific type.

• If yes, it is converted to a list and is assigned to a variable.

• This list is displayed as the output on the console.