Python program to find the distance between two gps locations

GetDistance.py

__author__ = 'Amal G Jose'

from math import radians, cos, sin, asin, sqrt

def get_distance(lon1, lat1, lon2, lat2):
    ##convert decimal degrees to radians
    lon1, lat1, lon2, lat2 = map(radians, [lon1, lat1, lon2, lat2])

    ##haversine formula
    dlon = lon2 - lon1
    dlat = lat2 - lat1
    a = sin(dlat/2)**2 + cos(lat1) * cos(lat2) * sin(dlon/2)**2
    c = 2 * asin(sqrt(a))
    # Radius of earth in kilometers. Use 3956 for miles
    r = 6371
    return c * r


lat1 = 12.971599
long1 = 77.594563

lat2 = 12.971599
long2 = 77.604562

print get_distance(long1,lat1,long2, lat2)