difference between import modules

Valerie Meunier

look at this two lines:

from datetime import timedelta # = import class timedelta from module datetime => ok
from datetime.timedelta import * # = import eveything from class timedelta from module datetime =>error

Where Is the difference between both lines? I get the error import datetime.timedelta not resolved at the second line.

Thanks

5 Replies

Know the answer? Post it — somebody with the same question will find it here.

Naimish Makwana3y ago
Accepted answer
Hi Valerie,

The first line imports the timedelta class directly from the datetime module. This allows you to use the timedelta class in your code without having to prefix it with datetime..

The second line attempts to import everything from the timedelta class from within the datetime module. However, this is not a valid import statement because timedelta is not a module, but rather a class within the datetime module. Therefore, you get an error message stating that the import statement could not be resolved.

To use the timedelta class in your code, you can either use the first import statement and refer to the class as timedelta, or you can import the datetime module and refer to the class as datetime.timedelta, like this:
```
import datetime
delta = datetime.timedelta(days=1)
```
Thanks

Naimish Makwana
+1
Valerie Meunier3y ago
Hi Naimish

this works without error: from tkinter.messagebox import *

How do you explain this? I presume messagebox isn't either a module, but rather a class within the module tkinter. So, why no error here?

Thanks
0
Aman Gupta3y ago
Hi,

Sorry to hear that.

Please refer these answers might be helpful in your case.

https://stackoverflow.com/questions/15707532/import-datetime-v-s-from-datetime-import-datetime

https://stackoverflow.com/questions/45862797/datetime-datetime-timedelta-errors-all-permutations

Thanks
0
Valerie Meunier3y ago
Thanks for replying, but this is not my question. I already know what you wrote. My question is: where is the difference between

from datetime import timedelta and from datetime.timedelta import * ?

Thanks
+1
Aman Gupta3y ago
Hi Valerie,
- datetime – combines date and time information.
- timedelta – represents the difference between two dates and times.
Refer to this detailed article on this, https://learnpython.com/blog/python-datetime-for-beginners/#:~:text=datetime%20%E2%80%93%20combines%20date%20and%20time,between%20two%20dates%20or%20times.

Thank you.
0