AttributeError: 'str' object has no attribute 'datetime'

This error occurs when you try to access the datetime attribute of a string object. This is not possible because string objects do not have a datetime attribute.

To fix this error, you need to convert the string to a datetime object first. You can use the datetime module in Python to do this.

Here is an example of how to convert a string to a datetime object:

import datetime

str_date = '2021-08-25 12:30:45'
datetime_date = datetime.datetime.strptime(str_date, '%Y-%m-%d %H:%M:%S')

In this example, we first import the datetime module. We then create a string variable called `str_date` that contains a date and time in a specific format. We then use the `strptime()` method of the datetime object to convert the string to a datetime object. The `%Y-%m-%d %H:%M:%S` argument specifies the format of the string, which in this case is year-month-day hour:minute:second.

Once you have the datetime object, you can access its attributes such as year, month, day, etc.