Can someone explain why this is happening?

Question

a = [1.2, 3.4, 10.3]
b = [2.1, 2.2, 11.4]
c = map(min, a, b)
print(c) # returns a map generator
print(list(c))# returns a list with mins of a and b
for i in c:
print(i)
# doesn't print anything... but if I comment line 5, printing i from line 7 goes just well...

Answer 1

A generator generates output only once. After print(list(c)), the generator is "empty" and you need to re-generate the content to use it again. If you put another c = map(min, a, b) before the for loop, it will work as expected.

Answer 2

Thanks Anna!