list2007 = []

for i in range(len(res2007)):

    a = res2007[i][0]
    list2007.append(a)

set2007 = set([list2007])

TypeError Traceback (most recent call last)

in ()

----> 1 set2007 = set([list2007])

TypeError: 'tuple' object is not callable

참고로 res2007도 리스트타입 입니다.