Human: Give me a Python program to code for calculating manhattan distance in 2d. Assistant: 
Here is a Python program to calculate manhattan distance in 2d

import random

def manhattan_distance(x1, y1, x2, y2):
    """
    Calculate manhattan distance between two points.

    Arguments:
        x1 (int): x coordinate of first point.
        y1 (int): y coordinate of first point.
        x2 (int): x coordinate of second point.
        y2 (int): y coordinate of second point.

    Returns:
        int: Manhattan distance between two points.
    """
    return abs(x1 - x2) + abs(y1 - y2)

# Enter the x1, y1, x2, y2
x1 = 1
y1 = 2
x2 = 3
y2 = 4

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

#Remember to inspect code for bugs.