Itertool Chain

from itertools import chain
string = 'Toronto'
chain(string)
<itertools.chain at 0x108ed2ba8>

chars = chain(string)
type(chars)
itertools.chain

chars
<itertools.chain at 0x108ed2b70>

for c in chars:
    print(c)
T
o
r
o
n
t
o

for c in chars:
    print(c)
# Since the iteration is finished, you can't get the characters one more time