Human: Give me a Python code to index the closest value to the closest value. Assistant: 
Here is a Python code to index the closest value

import numpy as np

def closest(array, value):
    """
    Returns the index of the closest value in the array.
    """
    array = np.asarray(array)
    idx = (np.abs(array - value)).argmin()
    return idx

# Enter the array
array = [1, 2, 3, 4, 5, 6, 7, 8, 9]

# Enter the value
value = 5

# Calling the function
print((closest(array, value)))

#Remember to inspect code for bugs.