Python | función datetime.timedelta()

La función Python timedelta() está presente en la biblioteca de fecha y hora, que generalmente se usa para calcular las diferencias en las fechas y también se puede usar para la manipulación de fechas en Python. Es una de las formas más fáciles de realizar manipulaciones de fechas. 

Sintaxis: datetime.timedelta(días=0, segundos=0, microsegundos=0, milisegundos=0, minutos=0, horas=0, semanas=0) Devuelve: Fecha

Código #1: 

# Timedelta function demonstration
 
from datetime import datetime, timedelta
 
 
# Using current time
ini_time_for_now = datetime.now()
 
# printing initial_date
print ("initial_date", str(ini_time_for_now))
 
# Calculating future dates
# for two years
future_date_after_2yrs = ini_time_for_now + \
                        timedelta(days = 730)
 
future_date_after_2days = ini_time_for_now + \
                         timedelta(days = 2)
 
# printing calculated future_dates
print('future_date_after_2yrs:', str(future_date_after_2yrs))
print('future_date_after_2days:', str(future_date_after_2days))

initial_date 2019-02-27 12:41:45.018389
future_date_after_2yrs: 2021-02-26 12:41:45.018389
future_date_after_2days: 2019-03-01 12:41:45.018389

Código #2: 

# Timedelta function demonstration
from datetime import datetime, timedelta
 
 
# Using current time
ini_time_for_now = datetime.now()
 
# printing initial_date
print ('initial_date:', str(ini_time_for_now))
 
# Calculating past dates
# for two years
past_date_before_2yrs = ini_time_for_now - \
                       timedelta(days = 730)
 
# for two hours
past_date_before_2hours = ini_time_for_now - \
                        timedelta(hours = 2)
 
 
# printing calculated past_dates
print('past_date_before_2yrs:', str(past_date_before_2yrs))
print('past_date_before_2hours:', str(past_date_before_2hours))

initial_date 2019-02-27 12:41:46.104662
past_date_before_2yrs: 2017-02-27 12:41:46.104662
past_date_after_2days: 2019-02-27 10:41:46.104662

Código #3: 

# Timedelta function demonstration
from datetime import datetime, timedelta
 
# Using current time
ini_time_for_now = datetime.now()
 
# printing initial_date
print ("initial_date", str(ini_time_for_now))
 
# Some another datetime
new_final_time = ini_time_for_now + \
                 timedelta(days = 2)
 
# printing new final_date
print ("new_final_time", str(new_final_time))
 
 
# printing calculated past_dates
print('Time difference:', str(new_final_time - \
                             ini_time_for_now))

initial_date 2019-02-27 12:41:47.386595
new_final_time 2019-03-01 12:41:47.386595
Time difference: 2 days, 0:00:00