This error is a result of trying to call a range object as if it were a function. The
range() method returns a range object that consists of a series of integers. This error typically occurs when overriding the reserved word
range for the built-in method. You can solve this error by not using reserved words for functions or methods that you want to use in your program.
This tutorial will go through how to solve the error with code examples.
TypeError: ‘range’ 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
range objects do not respond to a function call because they are not functions. If you try to call a range object as if it were a function, you will raise the TypeError: ‘range’ 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 range object with the
val = range(1, 10, 2) print(type(val)) print(callable(val))
<class 'range'> False
The callable functions
False for the
Let’s look at an example of attempting to call a
range object. First, we will call the range method to get a
range object containing integers between
9 with a
range = range(1, 10, 2)
Next, we will use a for loop to iterate over the
range object and print the integers to the console.
for i in range: print(i)
Let’s run the code to see the result:
1 3 5 7 9
Next, we will try to create another
range object by calling the
range() method, converting the object to a
list and printing it to the console.
val = range(20) print(list(val))
Let’s run the code to see what happens:
--------------------------------------------------------------------------- TypeError Traceback (most recent call last) Input In , in <cell line: 1>() ----> 1 val = range(20) 3 print(list(val)) TypeError: 'range' object is not callable
The error occurs because we named the first
range object “
range“, which overrides the reserved name
range for the built-in method.
Therefore, when we try to call the
range() method again, we are instead trying to call the
range object, which is not callable.
We can solve the error by giving the range object a different name. First, we will delete the range object using the
Then, we will recreate the
range object with the variable name “
range_obj“, which we can iterate over and print the values to the console.
range_obj = range(1, 10, 2) for i in range_obj: print(i)
1 3 5 7 9
Next, we can define a second
range object, without raising the
val = range(20) print(list(val))
Let’s run the code to confirm the result:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
Congratulations on reading to the end of this tutorial!
For further reading on not callable TypeErrors, go to the articles:
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!