L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]def by_name(t):    return t[0]L2 = sorted(L, key=by_name)print(L2)

L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]
def by_score(t):
    return t[1]
L2 = sorted(L, key=by_score,reverse=True)
print(L2)