circular sequence generator

''' circular_sequence_generator3.py
can be replaced with itertools.cycle()

with Python25 use f.next()
with Python26 and higher use next(f)
'''

# allows Python27 to use Python3 print() options
from __future__ import print_function
import itertools

def circular_sequence_gen(seq=""):
    '''
    generic circular sequence generator
    '''
    i = 0
    while True:
        yield seq[i]
        i = (i + 1)%len(seq)

# testing ...
mystr = 'abc'

for count, c in enumerate(circular_sequence_gen(mystr)):
   print(c, end="")
   if count >= 20:
       break

print('')

for count, c in enumerate(itertools.cycle(mystr)):
   print(c, end="")
   if count >= 20:
       break

print('')

colors = ['red', 'blue', 'green', 'orange']

color_gen = circular_sequence_gen(colors)

for color in range(12):
    # Python26 and up
    print(next(color_gen))

print('-'*20)

color_gen = itertools.cycle(colors)

for color in range(12):
    # Python26 and up
    print(next(color_gen))

''' result -->
abcabcabcabcabcabcabc
abcabcabcabcabcabcabc
red
blue
green
orange
red
blue
green
orange
red
blue
green
orange
--------------------
red
blue
green
orange
red
blue
green
orange
red
blue
green
orange
'''