When it is required to remove tuples from a list of tuples where a ‘None’ element is present, a list comprehension can be used.
Below is a demonstration of the same −
Example
my_list = [(2, None, 12), (None, None, None), (23, 64), (121, 13), (None, ), (None, 45, 6)]
print("The list is : ")
print(my_list)
my_result = [sub for sub in my_list if not all(elem == None for elem in sub)]
print("The None tuples have been removed, the result is : " )
print(my_result)Output
The list is : [(2, None, 12), (None, None, None), (23, 64), (121, 13), (None,), (None, 45, 6)] The None tuples have been removed, the result is : [(2, None, 12), (23, 64), (121, 13), (None, 45, 6)]
Explanation
A list of tuple is defined, and is displayed on the console.
The list comprehension is used to iterate over the list.
The ‘all’ condition is used to see if there are ‘None’ elements.
When ‘None’ elements are present, they are filtered out.
The remaining data is assigned to a variable.
This variable is displayed as the output.