python tuple(元组）

# 元组[索引]
# 得到元组索引的值
# 但不能修改指定索引的值

# count
# index
#
# 公共方法：
# len()
# min()
# max()
# in
# not in
# 只要不涉及到修改成员的值， 所有列表适用的方法，元组都通用

# 元组  ()
# 元组可以理解为一个只读的列表
# 成员不能修改，不能添加， 不能删除的列表
tuple = ("刘备", "关羽", "张飞")  
tuple1 = ()  #定义一个空的元组
tuple2 = ("刘备", )   # 如果元组只有一个值，那么后面必须写逗号，不然是字符串
tuple3 = "刘备", "关羽", "张飞"  # 定义了一个元组，有三个成员
tuple4 = "刘备",  # 如果元组只有一个值，那么后面必须写逗号，不然是字符串
tuple5 = "刘备"   #这是一个字符串
tuple6 = ("刘备")  #这是一个字符串
print(tuple)
print(tuple1)
print(tuple2)
print(tuple3)
print(tuple4)
print(tuple5)
print(tuple6)

tuple = ("刘备", "关羽", "张飞")
a = tuple[1]
# print(a)

# print(tuple.count("刘备"))
# print(tuple.index("刘备"))
tuple2 = (4, 6, 1, 67, 100)

print(len(tuple2))
print(max(tuple2))
print(min(tuple2))
if 4 in tuple2:
    print("在tuple2里面")

if 2 not in tuple2:
    print("2不在tuple里面")

# 列表元组之间的转换
# list()
# tuple()

list1 = [1,2,34,2]
tuple1 = tuple(list1)   #列表转元组
print(tuple1)

tuple2 = (3, 6, 12, 100)
list2 = list(tuple2)   #元组转成列表
print(list2)

# 把元组追击到代码后面

list1 = ["刘备", "关羽", "张飞"]
tuple1 = ("曹操", "周瑜")
list1.extend(tuple1)   #改变的是list1，tuple没有改变
print(list1)
print(tuple1)

# 把元组放列表前面

list1 = ["刘备", "关羽", "张飞"]
tuple1 = ("曹操", "周瑜")

a = 0
for i in tuple1:
    list1.insert(a, i)
    a = a + 1
print(list1)