import pandas as pd
N = 6
dr = pd.date_range(start ='27-6-2020', end ='30-6-2020', freq = '{}H'.format(N))
for dt in dr:
print(dt)
'''
run:
2020-06-27 00:00:00
2020-06-27 06:00:00
2020-06-27 12:00:00
2020-06-27 18:00:00
2020-06-28 00:00:00
2020-06-28 06:00:00
2020-06-28 12:00:00
2020-06-28 18:00:00
2020-06-29 00:00:00
2020-06-29 06:00:00
2020-06-29 12:00:00
2020-06-29 18:00:00
2020-06-30 00:00:00
'''