Extract Particular Data Type Rows in Python

When it is required to extract particular data type rows, the list comprehension, the ‘isinstance’ method, and the ‘all’ operator are used.

Below is a demonstration of the same −

Example

 Live Demo

my_list = [[14,35, "Will"], [12, 26, 17], ["p", "y", "t"], [29, 40, 21]]

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

my_data_type = int

my_result = [row for row in my_list if all(isinstance(element, my_data_type) for element in row)]

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

Output

The list is :
[[14, 35, 'Will'], [12, 26, 17], ['p', 'y', 't'], [29, 40, 21]]
The result is :
[[12, 26, 17], [29, 40, 21]]

Explanation

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

• The data type is defined.

• A list iteration is used to iterate over the list.

• The ‘all’ operator and the ‘isinstance’ method is sued to check if the elements in the list belong to a specific data type.

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

• This is displayed as the output on the console.