date.replace() to update elements value of date object in python

replace() : Update date object by changing the parameters with new value .

from datetime import datetime
dt=datetime(2019,12,31)
print(dt.replace(year=2018,day=14,month=7))

Output

2018-07-14 00:00:00

Date with time

import datetime
# Year, Month, date, Hour, Minute , Second, mircosecond 
dt=datetime.datetime(2019,12,31,23,59,59,345234)
print(dt.replace(day=14))

Output

2019-12-14 23:59:59.345234

Using date object and adding new time part

from datetime import datetime
dt=datetime(2019,12,31)
print(dt.replace(year=2018,day=14,month=7,hour=13,minute=35,second=55,microsecond=324356))

Output

2018-07-14 13:35:55.324356

All parameters are optional

from datetime import datetime
dt=datetime(2019,12,31)
print(dt.replace())

2019-12-31 00:00:00

Replacing month with invalid date.

This code will generate ValueError

from datetime import datetime
dt=datetime(2020,3,31)
dt=dt.replace(month=4)
print(dt)

We can use Exception Handling to manage the code in this case.

from datetime import datetime
try:
    dt=datetime(2020,3,31)
    dt=dt.replace(month=4)
    print(dt)
except ValueError as my_msg:
    print ("This is a ValueError")
    print (my_msg)

Output is here

This is a ValueError
day is out of range for month

All Date Objects

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