partial match dictionary key(of tuples) in python

Question

I have a dictionary that maps 3tuple to 3tuple where key-tuples have some element in common

dict= { (a,b,c):(1,2,3),
        (a,b,d):tuple1,
        (a,e,b):         


        

Answer 1

@AshwiniChaudhary's solution can be trivially adapted for an object-oriented solution. You can subclass dict and add a method:

class tup_dict(dict):
    def getitems_fromtup(self, key):
        for k, v in self.items():
            if all(k1 == k2 or k2 is None for k1, k2 in zip(k, key)):
                yield v

d = tup_dict({("foo", 4 , "q"): 9,
              ("foo", 4 , "r"): 8,
              ("foo", 8 , "s"): 7,
              ("bar", 15, "t"): 6,
              ("bar", 16, "u"): 5,
              ("baz", 23, "v"): 4})

res = list(d.getitems_fromtup(("foo", 4, None)))  # [9, 8]