PTA (daily question) 7-74 yesterday

Xiao Ming likes the calculation of dates . What he wants to do this time is to subtract the date 1 Day operation , That is, subtract... From the input date 1 Result date in days .
for example ： The date is 2019-10-01, subtract 1 God , Then the result date is 2019-09-30.

Input format :
First enter a positive integer T, Number of groups representing test data , And then there was T Group test data . Each set of test inputs 1 Date , Date form is “yyyy-mm-dd”. Ensure that the date entered is legal , And the entered date and calculation results are in [1000-01-01,9999-12-31] Within the scope of .

Output format :
For each group of tests , On a line with “yyyy-mm-dd” Output results in the form of .

sample input :

1
2019-10-01

sample output :

2019-09-30

Code ：

import datetime

t = int(input())
for i in range(t):
    my_time = input()
    now_time = datetime.datetime.strptime(my_time, '%Y-%m-%d')
    new_time = now_time + datetime.timedelta(days=-1)
    print(str(new_time).split()[0])