Python 元祖的构造、转换和嵌套

1.元祖构造

# 元祖：有序的不可变元素集合
tup1 = (1, 2, 3)
tup2 = ('python', 'C++', 'java', 'php')
tup3 = ('python', [1, 2, 3], 'java', 3)
print(tup2)
print(type(tup2))

# 只有一个元素的时候，结尾加上逗号
a = ("http://www.wakey.com.cn/",)
print(type(a))
print(a)
# 结尾不加逗号,这里会把小括号当做运算符来处理
b = ("http://www.wakey.com.cn/")
print(type(b))
print(b)
# 使用逗号隔开，不加小括号也视为元祖
b = 'python', 'C++', 'java', 'php'
print(type(b))
print(b)

2.转换元祖

tup1 = tuple('python')  # 直接转化字符串成元祖
print(tup1)

list = ['python', 'java', 'php', 'MySql', 'C++', 'C', 'php', 'C#']
tup2 = tuple(list)  # 把列表转化成元祖
print(tup2)

dict = {'name': 'Tom', 'age': 18, 'love': 'python'}
tup3 = tuple(dict)  # 把字典转化成元祖，只能转换键
print(tup3)

range = range(1, 10)
tup4 = tuple(range)  # 把区间转化为元祖
print(tup4)

3.元祖的嵌套

tup3 = ('python', (1, 2, 3), 'java', 3)
print(tup3)
print(type(tup3))