Python Function to describe the distance between two points given by its latitude and longitude

distance_between_points.py

from math import sin, cos, radians, acos
def calculate_distance(lat_a, long_a, lat_b, long_b, in_miles=True):
    """all angles in degrees, default result in miles"""
    lat_a = radians(lat_a)
    lat_b = radians(lat_b)
    delta_long = radians(long_a - long_b)
    cos_x = (
        sin(lat_a) * sin(lat_b) +
        cos(lat_a) * cos(lat_b) * cos(delta_long)
        )
    EARTH_RADIUS_IN_MILES = 3958.761
    distance =  acos(cos_x) * EARTH_RADIUS_IN_MILES
    return distance if in_miles else distance/0.62137