I have a new problem

Test Results:
lets test it
should work with empty array (1 Passed, 0 Failed)
should work with one element (1 Passed, 0 Failed)
should reduce duplicates (5 Passed, 0 Failed)
and treat lowercase as different from uppercase (1 Passed, 0 Failed)
and work with int arrays
STDERR:
Traceback:
in
in unique_in_order
TypeError: 'int' object is not iterable

what is that meaning ?

ok i think i know whats wrong.

HI
The instruction says:

unique_in_order('AAAABBBCCDAABBB') == ['A', 'B', 'C', 'D', 'A', 'B']
unique_in_order('ABBCcAD') == ['A', 'B', 'C', 'c', 'A', 'D']
unique_in_order([1,2,2,3,3]) == [1,2,3]

shall be ok.

I made a function that gives ['A', 'B', 'C', 'D', 'A', 'B']
for unique_in_order('AAAABBBCCDAABBB')

but the test says :
Test Results:
✘ None should equal ['A', 'B', 'C', 'D', 'A', 'B']

what is the problem of this thing ?