Python – Extract rows with Complex data types

When it is required to extract rows with complex data types, the ‘isinstance’ method and list comprehension are used.

Example

Below is a demonstration of the same

my_list = [[13, 1,35], [23, [44, 54], 85], [66], [75, (81, 2), 29, 7]]

my_result = [row for row in my_list if any(isinstance(element, list) or isinstance(element, tuple) or isinstance(element, dict) or isinstance(element, set) for element in row)]

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

print("The resultant list is :")
print(my_result)

Output

The list is :
[[13, 1, 35], [23, [44, 54], 85], [66], [75, (81, 2), 29, 7]]
The resultant list is :
[[23, [44, 54], 85], [75, (81, 2), 29, 7]]

Explanation

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

• A list comprehension is used to iterate over the list and see if the element belongs to the ‘list’ type using the ‘isinstance’ method.

• This is assigned to a variable.

• This is displayed as the output on the console.