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from math import sin, cos, sqrt, atan2, radians 
# approximate radius of earth in km 
R = 6373.0 
lat1 = radians(52.2296756) 
lon1 = radians(21.0122287) 
lat2 = radians(52.406374) 
lon2 = radians(16.9251681) 
dlon = lon2 - lon1 dlat = lat2 - lat1 
a = sin(dlat / 2)**2 + cos(lat1) * cos(lat2) * sin(dlon / 2)**2 
c = 2 * atan2(sqrt(a), sqrt(1 - a)) 
distance = R * c
print("Result:", distance) 
print("Should be:", 278.546, "km")

def edit_distance(first , second): 
    first_len , second_len = len(first) , len(second) 
  
    if first_len > second_len : 
        first , second = second , first 
        first_len , second_len = second_len , first_len 
  
    print(first_len)
    print(second_len) 
    current = range(first_len+1) 
  
    for i in range(1,second_len+1): 
        previous , current = current , [i]+[0]*second_len 
  
        for j in range(1,first_len+1): 
            add , delete = previous[j]+1 , current[j-1]+1 
            change = previous[j-1] 
            if first[j-1] != second[i-1]: 
                change = change + 1 
  
            current[j] = min(add , delete , change) 
  
    return current[first_len] 



sFirstStr = sys.argv[1] 
sSecondStr = sys.argv[2] 
  
sFirst = unicode(sFirstStr,'cp949') 
sSecond = unicode(sSecondStr,'cp949') 


nDistanceValue = edit_distance(sFirst,sSecond) 
  
print(nDistanceValue)