Introduction
The error message "TypeError: builtin_function_or_method object is not subscriptable" is raised when you try to use square brackets on a built-in function or method in Python, which is not allowed. In this tutorial, we will go over some examples of common causes of this error and how to fix them.
Example 1: Using square brackets on the "len" function
# This will raise the TypeError: builtin_function_or_method object is not subscriptable x = [1, 2, 3] print(len(x)[0])
Solution 1: Use the built-in function or method as intended
# Instead of trying to access an element of the returned value, just use the function or method as intended x = [1, 2, 3] print(len(x))
Example 2: Assigning a built-in function or method to a variable
# This will raise the TypeError: builtin_function_or_method object is not subscriptable x = len print(x[0])
Solution 2: Use the built-in function or method directly
# Instead of assigning the function to a variable, use the built-in function or method directly x = [1, 2, 3] print(len(x))
Example 3: Confusing a list method with a list
# This will raise the TypeError: builtin_function_or_method object is not subscriptable x = [1, 2, 3] print(x.append[0])
Solution 3: Use the list method as intended
# Instead of trying to access an element of the returned value, just use the method as intended x = [1, 2, 3] x.append(4) print(x)
Conclusion
By understanding the examples and solutions provided in this tutorial, you should be able to fix the "TypeError: builtin_function_or_method object is not subscriptable" error in your Python code. Remember that built-in functions and methods in Python cannot be used with square brackets and should be used as intended.