TypeError: '<' not supported between instances of 'builtin_function_or_method' and 'int

This error occurs when you try to use the less than (<) operator between a built-in function or method object and an integer.

For example:

a = len
b = 5

if a < b:
    print("a is less than b")

In this code, `a` is assigned the built-in function `len`, which returns the length of an object. `b` is assigned the integer value 5. When the code tries to compare `a` and `b` using the less than operator, it raises a TypeError because you cannot compare a function object to an integer.

To fix this error, you need to make sure that you are comparing two values of the same type. In this case, you could call the function `len` on an object and compare the result to the integer value:

a = [1, 2, 3]
b = 5

if len(a) < b:
    print("a has fewer elements than b")

Here, `a` is a list with three elements, so `len(a)` returns the integer value 3. The code can now compare `3` and `5` using the less than operator without raising an error.