From datetime import datetime в чем ошибка

Here is what is happening:

1. you named your file datetime.py for testing
2. then you wrote import datetime inside it, because that’s the module you want to try out

What happens when you run the file, is that:

1. Python first looks into your local directory for a module called datetime
2. Since Python only finds your original file, it makes an empty module file called datetime.pyc, because it expects you to build upon it

Luckily, the nice people at StackOverflow made you aware of this naming error, and you renamed your datetime.py file to something else. But confusingly you still get errors and the frustration slowly builds…

Solution:

1. Always make sure that your filenames aren’t equal to any Python module you want to import
2. If you still forget, then make sure to delete or rename both the local .py script and the local .pyc file. This should fix your problem.

The reason this is such a common error, is that people like testing stuff when programming. And when they do, the natural inclination of most people is to make a script with the same name as the thing they want to test. However that’s one of the first gotchas most Python developers run into. If the cool people that designed Python read Donald Norman before making their system, this would never be a problem. But as it is, we just have to adjust to how the Python module system works before naming our files. Note: There are still reasons for the Python module system working this way, however that doesn’t preclude it from being confusing to beginners.

This error occurs when you import the datetime class from the datetime module using

from datetime import datetime

and then try to create a datetime object using the class constructor datetime.datetime().

You can solve this error by removing the extra datetime when creating a datetime object or using:

import datetime

instead of:

from datetime import datetime

This tutorial will go through the error in detail and how to solve it with code examples.

AttributeError: ‘datetime.datetime’ has no attribute ‘datetime’

AttributeError occurs in a Python program when we try to access an attribute (method or property) that does not exist for a particular object. datetime is a built-in Python module that supplies classes for manipulating dates and times. One of the classes in datetime is called datetime. It can be unclear when both the module and one of the classes share the same name. If you use the import syntax:

from datetime import datetime

You are importing the datetime class, not the datetime module. We can find the attributes of an object of the datetime class using the built-in dir() function.

from datetime import datetime

# dir of object of datetime class
obj = datetime(1999, 12, 31)

attributes = dir(obj)

print('datetime' in attributes)

In the above code, we created an object of the datetime class the assigned its list of attributes returned by dir() to the variable name attributes. We then check for the datetime attribute in the list using the in operator. When we run this code we see it returns False.

False

We can see that datetime is not an attribute of an object of the datetime class.

However, if we import the datetime module and call the dir function as we have done above, we will see that datetime is an attribute of the datetime module

import datetime
# dir of datetime module
attributes = dir(datetime)

print('datetime' in attributes)

True

The above list shows that datetime is a class within the datetime module. Next, we will use an example to demonstrate and solve the error.

Example

Let’s look at an example of creating a datetime object. The datetime class requires three parameters to create a date: year, month, and day.

from datetime import datetime

date = datetime.datetime(2022, 6, 17)

print(date)

Let’s run the code to see what happens:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [4], in <cell line: 3>()
      1 from datetime import datetime
----> 3 date = datetime.datetime(2022, 6, 17)
      5 print(date)

AttributeError: type object 'datetime.datetime' has no attribute 'datetime'

The error occurs because we imported the datetime class. When we try to create a date object using datetime.datetime we are trying to call datetime.datetime.datetime, which does not exist.

We can solve this error by removing the extra datetime, as we have imported the datetime class, creating an object of the class only requires the datetime() class constructor.

from datetime import datetime

date = datetime(2022, 6, 17)

print(date)

Let’s run the code to see the result:

2022-06-17 00:00:00

We successfully created a date object.

Solution #2: Use import datetime

The second way to solve this error is to import the datetime module and then access the class constructor through datetime.datetime(). The first datetime is the module name, and the second is the class constructor. Let’s look at that the revised code:

import datetime

date = datetime.datetime(2022, 6, 17)

print(date)

Let’s run the code to see the result:

2022-06-17 00:00:00

We successfully created a date object.

Summary

Congratulations on reading to the end of this tutorial! Remember that from datetime import datetime imports the datetime class and import datetime imports the datetime module.

For further reading on AttributeErrors involving datetime, go to the article:

• How to Solve Python AttributeError: module ‘datetime’ has no attribute ‘now’
• How to Solve Python AttributeError: ‘datetime.datetime’ object has no attribute ‘timedelta’

To learn more about Python for data science and machine learning, go to the online courses page on Python for the most comprehensive courses available.

Have fun and happy researching!

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