Human: if column is not null. Assistant: 
Here is a Python program to if column is not null

import numpy as np

def is_not_null(column):
    """
    Check if a column is not null.
    """
    return not np.isnan(column).any()

# Enter the data
column = np.array([1, 2, 3, 4, 5])

# Calling the function
print((is_not_null(column)))

#Example Output
# True

#Remember to inspect code for bugs.