in a list or tuple

[BashBedlam]

Here's one way to go about it using try and except and then parsing the error that is returned.

tester1 = ('this', 'and', 'that')
tester2 = ['this', 'and', 'that']

def list_or_tuple (test_element) :
	try :
		test_element ['dummy']
	except TypeError as error:
		return (error.__str__ ().split (' ') [0])

print (f'tester1 [0] is "{tester1 [0]}".')
print (f'tester1 is a {list_or_tuple (tester1)}.\n')
print (f'tester2 [2] is "{tester2 [2]}".')
print (f'tester2 is a {list_or_tuple (tester2)}.')

Output:
tester1 [0] is "this".
tester1 is a tuple.

tester2 [2] is "that".
tester2 is a list.