from list of tuples, get tuple closest to a given value

Question

Given a list of tuples containing coordinates, I want to find which coordinate is the closest to a coordinate I give in input:

cooList = [(11.6702634, 72.313         


        

Answer 1

If I understand you right, you want the coordinate from the list that has the least distance to the given coordinate. That means you can just loop through the list like that:

def closest_coord(list, coord):
    closest = list[0]
    for c in list:
        if distance(c, coord) < distance(closest, coord):
            closest = c
    return closest

To calculate the distance between two variables, just use Pythagoras.

def distance(co1, co2):
    return sqrt(pow(abs(co1[0] - co2[0]), 2) + pow(abs(co1[1] - co2[2]), 2))

I hope this helps!