'numpy.ndarray' object has no attribute 'map'

The error message "'numpy.ndarray' object has no attribute 'map'" is indicating that you are trying to use the `map()` function on a NumPy array, which is not supported. The `map()` function is a built-in Python function that works on iterable objects like lists, tuples or sets, but NumPy arrays are not iterable in the same way.

If you want to apply a function to all elements of a NumPy array, you can use the `numpy.vectorize()` function. Here's an example:

import numpy as np

arr = np.array([1, 2, 3, 4, 5])

# define a function to apply to each element
def square(x):
    return x**2

# use vectorize to apply the function to all elements
result = np.vectorize(square)(arr)

print(result)

This should output:

[ 1  4  9 16 25]

Alternatively, you can use a loop to apply a function to each element of the array one at a time.