I used
I would like to give some feedback about ...
From: https://py.checkio.org/mission/non-unique-elements/solve/
I already tested on my python idle, and works fine
if 0 HTTP_USER_AGENT:for i in range(len(data)):
if data.count(data[i])==1:
print(str(data[i])+" : este no se repite")
data2.insert(i,data[i])
for i in range(len(data2)):
data.remove(data2[i])
print (data)
print (data2)
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36