The TypeError ‘datetime.datetime’ object is not callable occurs when you try to call a
datetime.datetime object by putting parenthesis
() after it like a function. Only functions respond to function calls.
This error commonly occurs when you override the name for a built-in class or method from the datetime module.
You can solve the error by avoiding naming variables after class or method names that you want to import.
This tutorial will go through the error in detail and how to solve it with code examples.
TypeError: ‘datetime.datetime’ object is not callable
Calling a function means the Python interpreter executes the code inside the function. In Python, we can only call functions. We can call functions by specifying the name of the function we want to use followed by a set of parentheses, for example,
function_name(). Let’s look at an example of a working function that returns a string.
# Declare function def simple_function(): print("Learning Python is fun!") # Call function simple_function()
Learning Python is fun!
We declare a function called
simple_function in the code, which prints a string. We can then call the function, and the Python interpreter executes the code inside
Objects of the datetime.datetime class do not respond to function calls because they are not functions. If you try to call a
datetime.datetime object as if it were a function, you will raise the TypeError: ‘datetime.datetime’ object is not callable.
We can check if an object is callable by passing it to the built-in
callable() method. If the method returns
True, then the object is callable. Otherwise, if it returns
False the object is not callable. Let’s look at evaluating a
datetime.datetime object with the callable method:
from datetime import datetime today = datetime.today() print(callable(today))
The callable function returns
False for the
Let’s look at an example of attempting to call a
datetime.datetime object. First, we will import the
date classes from the
datetime module and then create a
datetime object for today’s date.
from datetime import datetime, date date = datetime.today()
Next, we will try to create a date object and print the date to the console.
next_week = date(2022, 6, 29) print(next_week)
The error occurs because we defined a
datetime.datetime object and assigned it to the variable name
date. Then when we try to create a
datetime.date object using the
date() constructor, we are instead trying to call the
datetime.datetime object called
date, which is not callable.
--------------------------------------------------------------------------- TypeError Traceback (most recent call last) Input In , in <cell line: 5>() 1 from datetime import datetime, date 3 date = datetime.today() ----> 5 next_week = date(2022, 6, 29) 7 print(next_week) TypeError: 'datetime.datetime' object is not callable
We can solve this error by using variable names not reserved for class or method names which we want to use.
We can find the names of the classes and methods in the
datetime module using the
dir() method as follows:
import datetime print(dir(datetime))
['__add__', '__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__ne__', '__new__', '__radd__', '__reduce__', '__reduce_ex__', '__repr__', '__rsub__', '__setattr__', '__sizeof__', '__str__', '__sub__', '__subclasshook__', 'astimezone', 'combine', 'ctime', 'date', 'day', 'dst', 'fold', 'fromisocalendar', 'fromisoformat', 'fromordinal', 'fromtimestamp', 'hour', 'isocalendar', 'isoformat', 'isoweekday', 'max', 'microsecond', 'min', 'minute', 'month', 'now', 'replace', 'resolution', 'second', 'strftime', 'strptime', 'time', 'timestamp', 'timetuple', 'timetz', 'today', 'toordinal', 'tzinfo', 'tzname', 'utcfromtimestamp', 'utcnow', 'utcoffset', 'utctimetuple', 'weekday', 'year']
Let’s look at the revised code:
from datetime import datetime, date todays_date = datetime.today() next_week = date(2022, 6, 29) print(next_week)
We renamed the
datetime.datetime object to
todays_date allowing us to create the
date object using the
Let’s run the code to get the result:
Congratulations on reading to the end of this tutorial!
For further reading on not callable TypeErrors, go to the articles:
- How to Solve Python TypeError: ‘tuple’ object is not callable.
- How to Solve Python TypeError: ‘bool’ object is not callable.
- How to Solve Python TypeError: ‘DataFrame’ object is not callable.
To learn more about Python, specifically for data science and machine learning, go to the online courses page on Python.
Have fun and happy researching!
Suf is a research scientist at Moogsoft, specializing in Natural Language Processing and Complex Networks. Previously he was a Postdoctoral Research Fellow in Data Science working on adaptations of cutting-edge physics analysis techniques to data-intensive problems in industry. In another life, he was an experimental particle physicist working on the ATLAS Experiment of the Large Hadron Collider. His passion is to share his experience as an academic moving into industry while continuing to pursue research. Find out more about the creator of the Research Scientist Pod here and sign up to the mailing list here!