Question

Given the following coordinates: (f, 9), (z, 2), (t, 4), (x, 8), (b, 1), (m, 7).

Sort the coordinates in Python (in ascending order) by comparing the first part of the

coordinates. You may use the sort() function in Python.

Answer 1

# sorting the list coordinates using first coordinate part string or character
# for sorting strings bubble sorting is used
def SortFirstCoordinate(lst):
   listlen = len(lst)   #length for list
   for i in range(0,listlen):
       for j in range(0, listlen-i-1):
           if (lst[j][0] > lst[j + 1][0]):   #checking first coordinate is greater than next coordinate if true then swap both coordinates
               tmpvar = lst[j]
               lst[j]= lst[j + 1]
               lst[j + 1]= tmpvar
   return lst   #returning sorted list

#main code starts
#list with coordinates
lst =[('f', 9), ('az', 2), ('t', 4),('x', 8), ('b', 1), ('m', 7)]
#displaying sorted list by first coordinate
print(SortFirstCoordinate(lst))