#!/usr/bin/env python3
# -*- coding: utf-8 -*-
new = []
def flatten(lists):
for s in lists:
if isinstance(s, list):
flatten(s)
else:
new.append(s)
return new
items = [1, 2, [3, 4, [5, 6], 7, [8], 9], 10]
newItems = flatten(items)
print(newItems)
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