Generate unique random numbers from different lists

[Takeshio]

You are getting a list out of random.sample, not an integer. Therefore it's not in the list of integers you are checking against, and you get a list of lists rather than a list of integers. Put [0] at the end of line 15 to get the integer out.

Is there some reason you are not just making a list that excludes the outcasts and taking a sample from that?

valid = [x for x in whole_list if x not in outcast_list]
selection_list = random.sample(valid, 5)

Thanks for the prompt reply and explanation, mate! I also just realized this returning "list" instead of "int" issue, a few minutes ago, while debugging. As I'm new to Python and not well versed to coding in "short form" like yours, I amended my code as follows.

import random

# The "outcast_list" list contains numbers to be filtered off.
outcast_list = [1, 2, 3, 4, 5, 6]

# The "whole_list" list contains numbers that the generated number shall randomly choose from.
whole_list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]

selection_list = []
status = False

# Create a loop until the "status" turns True (i.e. when the list of randomized numbers has 5 numbers inside it.).
while status is False:
	# Generate one random from the "whole_list" one at a time.
	i_list = random.sample(whole_list, 1)
	i = int(i_list[0])

	# Create the following 3 conditions before adding the number into the "selection_list" list.
	if (i not in outcast_list) and (i not in selection_list) and (status is False):
		selection_list.append(i)

	# Break out of the "while" loop when the "selection_list" has 5 numbers inside it.
	if len(selection_list) == 5:
		status = True
		break

print(selection_list)