Typeerror: type numpy.ndarray doesnt define __round_

Are you getting the Typeerror: type numpy.ndarray doesnt define __round__ method ? Then this post is for you. In this post, you will know what the type numpy.ndarray doesn’t define __round__ method error occurs and how to solve them easily.

What is a Numpy Module?

Numpy is a Python package that allows you to manipulate the numpy array. Using it you can easily do complex mathematics calculations easily. For this, it has many inbuilt functions.

Why typeerror: type numpy.ndarray doesnt define round method occurs ?

The main reason for getting this typeerror is that you are using the round() function on the numpy array. As you already know that numpy array is a multi-dimensional array this round() function does not work on it.

You will get the error when you run the below lines of code.

import numpy as np
sample_arr = np.array([10,20,30,40])
rounded_arr = round(sample_arr)
print(rounded_arr)

Output

Solution of type numpy.ndarray doesn’t define round method

The solution to remove this error is very simple. You don’t have to use the round() function on the NumPy function as the Python round() function is for only single numerical values like integer, double, float, etc.

If you want to round all the elements of the numpy array then you have to use the numpy.round() function for that. It will take the input numpy array as an argument.

You will not get the error when you will run the below lines of code.

import numpy as np
sample_arr = np.array([10.2,20.2,30.2,40.2])
rounded_arr = np.round(sample_arr)
print(rounded_arr)

Output

Conclusion

You will get the error when you will use the Python round() function on the numpy array. The Python round() function is only for single or scalar values. The above is a solution for the error typeerror: type numpy.ndarray doesnt define __round__ method.

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