Using list and tuple for grouping dict based on a conditional value

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st={'Ambiorix':90,'Katherine':89,'Armando':88,'Ruth':77,'Rosa':60,'Pedro':63,'Maria':74,'Jesus':100,'Juan':99}

tp=[tp for tp in st.items()]

print(tp)

for a in tp:

    if a[1]  >=70 and a[1]  <=79:

        print(a)

        

        

print('----------------')

def getrange(st,z,y):

    tp=[tp for tp in st.items()]

    

    for a in tp:

       if a[1]  >=z and a[1]  <=y:

        print(a)

getrange(st,0,69)

    

[('Ambiorix', 90), ('Katherine', 89), ('Armando', 88), ('Ruth', 77), ('Rosa', 60), ('Pedro', 63), ('Maria', 74), ('Jesus', 100), ('Juan', 99)]

('Ruth', 77)

('Maria', 74)

----------------

('Rosa', 60)

('Pedro', 63)