Can generator be used more than once?

Question

This is my piece of code with two generators defined:

one_line_gen = (x for x in range(3))

def three_line_gen():
    yield 0
    yield 1
    yield 2
         


        

Answer 1

no, you can not iterate over a generator twice. a generator is exhausted once you have iterated over it. you may make a copy of a generator with tee though:

from itertools import tee

one_line_gen = (x for x in range(3))
gen1, gen2 = tee(one_line_gen)
# or: 
# gen1, gen2 = tee(x for x in range(3))

for item in gen1:
    print(item)

for item in gen2:
    print(item)

for the other issues see Ofer Sadan's answer.