Human: manhattan distance two points. Assistant: 
Here is a Python program to manhattan distance two points

import numpy as np

def manhattan_distance(x1, y1, x2, y2):
    """
    Calculate the manhattan distance between two points.
    """
    return abs(x1 - x2) + abs(y1 - y2)

# Enter the data
x1 = 1
y1 = 1
x2 = 2
y2 = 2

# Calling the function
print((manhattan_distance(x1, y1, x2, y2)))

#Example Output
# 2

#Remember to inspect code for bugs.