how to sort a list of tuples with custom function

Tue Aug 1 15:50:23 EDT 2017

def isneighborlocation(lo1, lo2):
 if abs(lo1[0] - lo2[0]) < 7 and abs(lo1[1] - lo2[1]) < 7:
 return 1
 elif abs(lo1[0] - lo2[0]) == 1 and lo1[1] == lo2[1]:
 return 1
 elif abs(lo1[1] - lo2[1]) == 1 and lo1[0] == lo2[0]:
 return 1
 else:
 return 0
sorted(testing1, key=lambda x: (isneighborlocation.get(x[0]), x[1]))
return something like
[(1,2),(3,3),(2,5)]