When it is required to filter all the uppercase characters from a list of tuples, a simple iteration, a Boolean value, the ‘append’ method and the ‘isupper’ methods are used.
Below is a demonstration of the same −
my_list = [("PYTHON", "IS", "Fun"), ("PYTHON", "COOl"), ("PYTHON", ), "ORIENTED", "OBJECT"] print("The list is : " ) print(my_list) my_result_list =  for sub_list in my_list: my_result = True for element in sub_list: if not element.isupper(): my_result = False break if my_result: my_result_list.append(sub_list) print("The resultant list is : ") print(my_result_list)
The list is : [('PYTHON', 'IS', 'Fun'), ('PYTHON', 'COOl'), ('PYTHON',), 'ORIENTED', 'OBJECT'] The resultant list is : [('PYTHON',), 'ORIENTED', 'OBJECT']
A list of tuples is defined and is displayed on the console.
An empty list is defined.
The original list is iterated over, and a Boolean value is set to ‘True’.
The list is again iterated and every element is checked to belong to upper case.
If not, the Boolean value is set to False.
The control breaks out of the loop.
Based on the Boolean value, the element is appended to the empty list.
This list is displayed as output on the console.