Python 30个元组操作方法

colors = ('red', 'green', 'blue')

dimensions = 10, 20, 30

empty_tuple1 = ()
empty_tuple2 = tuple()

single_item = (42,)  # 正确
not_a_tuple = (42)   # 错误，实际是整数

numbers_tuple = tuple([1, 2, 3])
chars_tuple = tuple("Python")

squares = tuple(x**2 for x in range(5))

pairs = tuple(zip(['a', 'b'], [1, 2]))  # (('a', 1), ('b', 2))

repeated = ('a', 'b') * 3  # ('a', 'b', 'a', 'b', 'a', 'b')

data = (10, 20, 30)
print(data[1](@ref)  # 输出20

print(data[-1])  # 输出30

subset = data[1:]  # (20, 30)

alternate = data[::2]  # (10, 30)

reversed_data = data[::-1]  # (30, 20, 10)

print(20 in data)  # True

count = (1, 2, 2, 3).count(2)  # 2

position = ('a', 'b', 'c').index('b')  # 1

length = len(data)  # 3

max_val = max((5, 2, 8))  # 8
min_val = min((5, 2, 8))  # 2

combined = (1, 2) + (3, 4)  # (1, 2, 3, 4)

temp_list = list(data)
temp_list[1] = 25
new_tuple = tuple(temp_list)  # (10, 25, 30)

original = ('a', 'b', 'c', 'd')
modified = original[:2] + original[3:]  # ('a', 'b', 'd')

# 元组转列表
list_from_tuple = list(('a', 'b'))
# 元组转字符串
str_from_tuple = ''.join(('h', 'e', 'l', 'l', 'o'))
# 元组转字典(需元素为键值对)
dict_from_tuple = dict((('a', 1), ('b', 2)))

x, y, z = (10, 20, 30)

first, *middle, last = (1, 2, 3, 4, 5)  # middle=[2,3,4]

def func(a, b, c):
    return a + b + c
args = (1, 2, 3)
result = func(*args)  # 6

from collections import namedtuple
Point = namedtuple('Point', ['x', 'y'])
p = Point(11, y=22)  # Point(x=11, y=22)

print((1, 2) < (1, 3))  # True
print((1, 2, 3) > (1, 2))  # True

point = (2, 3)
match point:
    case (0, 0):
        print("原点")
    case (x, 0):
        print(f"X轴上: {x}")
    case (0, y):
        print(f"Y轴上: {y}")
    case (x, y):
        print(f"坐标: ({x}, {y})")

matrix = {
    (0, 0): 'A1',
    (0, 1): 'A2',
    (1, 0): 'B1'
}
print(matrix[(0, 1)])  # 'A2'

class Point:
    __slots__ = ('x', 'y')  # 使用元组替代字典存储属性
    def __init__(self, x, y):
        self.x = x
        self.y = y