Human: Python code to numpy average of minimum value in each column of array. Assistant: 
Here is a Python code to numpy average of minimum values in each column of array

import numpy as np

def _average_min_column(array):
    """
    Returns the average of the minimum value in each column of the array.
    """
    return np.average(np.min(array, axis=0))

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

# Calling the function
print((_average_min_column(array)))

#Example Output
# 2.0

#Remember to inspect code for bugs.