python元组练习中遇到的问题

有两个存储了学生信息的元组:A=((1,'张一',18,'女'), (2,'张二',19,'男'), (3,'张三',17,'男'), (4,'张四',19,'女'), (5,'张五',21,'男'));B=((1,'张一',18,'女'), (2,'张十',19,'男'), (3,'张三',17,'男'), (4,'张四',20,'女'),(5,'张五',21,'男'))。完成以下要求:
(1)找出两个元组中,重复的记录;
(2)选择B中的重复记录,在记录中增加备注信息“C”;
(3)在第二步的基础上,将所有记录合并,先按性别、姓名排序,对排序后的结果重新编排序号。注意输出结果基本要与图片一致。
*提示:在操作过中,要用到集合、列表及元组之间的相互转换。
预期结果:
(1)重复的记录:(1,'张一',18,'女'),(3,'张三',17,'男'),(5,'张五',21,'男')


(2)对重复记录进行修改
(1,'张一',18,'女','C'),(3,'张三',17,'男','C'),(5,'张五',21,'男','C')


(3)合并不重复的记录和修改重复后的记录:
((1,'张一',18,'女'),(2,'张一',18,'女','C'), (3,'张四',19,'女'), (4,'张三',17,'男'), (5,'张三',17,'男','C'), (6,'张二',19,'男'),(7,'张五',21,'男'),(8,'张五',21,'男','C')


# (1)
A=((1,'张一',18,'女'), (2,'张二',19,'男'), (3,'张三',17,'男'), (4,'张四',19,'女'), (5,'张五',21,'男'))
B=((1,'张一',18,'女'), (2,'张十',19,'男'), (3,'张三',17,'男'), (4,'张四',20,'女'),(5,'张五',21,'男'))
temp=set(A)&set(B)
print(temp)
# (2)
temp=[tuple(list(i)+['C']) for i in temp]
print(temp)
#(3)
temp=set(temp)
temp=((set(A)|set(B))-(set(A)&set(B)))|temp
temp=list(temp)
temp.sort(key=lambda x:(x[3],x[1]))
print(temp)
A=((1,'张一',18,'女'), (2,'张二',19,'男'), (3,'张三',17,'男'), (4,'张四',19,'女'), (5,'张五',21,'男'))
B=((1,'张一',18,'女'), (2,'张十',19,'男'), (3,'张三',17,'男'), (4,'张四',20,'女'),(5,'张五',21,'男'))
c = list(A) + list(B)


_ = []
modify = []
unsim = []
for i in c:
    if i[1] in _:
        print("重复的:", i)
        new = list(i)
        new.append("C")
        modify.extend((tuple(new), ))
    else:
        _.extend(i)
        unsim.extend((i,))

print("修改后的:", modify)

dic={k[1]: k for k in modify}
#print(dic)
newfin = []
#print(f"unsim =={unsim}")
unsim.extend(modify)
for i,v in enumerate(sorted(unsim)):
     p = list(v)
     p[0] = i + 1
     newfin.append(tuple(p))
print("合并不重复和修改后的:",newfin)