maprange.py

#!/usr/bin/env python3

s = set()
a = range(3)
s.update(a)
print(list(a))                  # [0, 1, 2]

b = map(lambda x:10+x,a)
print(list(b))                  # [10, 11, 12]
s.update(b)
print(list(b))                  # []