How to show a notification when the previously entered date arrives-CodePudding

I'm trying to make a reminder app, but I can't find out how to show if the entered date is the current date. To give an example:

I added a reminder on December 19, 2021 at 17:45, and I want to know if this date is before today's date.

CodePudding user response：

You can use datetime.datetime.strptime() to convert string to datetime object. Then you can calculate time delta with to check how much time is left.

import datetime

reminder = datetime.datetime.strptime('12/19/2021, 19:11:14',
                                      "%m/%d/%Y, %H:%M:%S")

print(datetime.datetime.now()) # 2021-12-12 17:24:01.573420
time_delta = reminder - datetime.datetime.now()
print(time_delta.seconds) # 6432
print(time_delta.days) # 7

If the current date is after the reminder date, days will be negative.

CodePudding user response：

You can use the python's builtin datetime module.

You can import it like this:

from datetime import datetime

To convert the reminder string to a date time object, you can use the strptime() function.

reminder_date = "December 19, 2021 at 17:45"
reminder = datetime.strptime(reminder_date, "%B %d, %Y at %H:%M")

Next, get the current datetime object.

current = datetime.now()

Finally, you can compare them using python's builtin comparison operators as follows.

if reminder < current:
    print("passed")
else:
    print("future")