Python元祖的获取、判定、比较、拼接、拆包操作

1.获取元祖元素

tup1 = ('python', 'java', 'php', 'MySql', 'C++', 'C', 'php', 'C#')
# 1.count()  # 获取元祖中某个元素的个数，元素不存在返回0
print(tup1.count('php'))
# 2.index()  # 获取元祖中某个元素首次出现的位置下标，不存在返回错误
print(tup1.index('php'))
# 3.len()  # 获取元祖的长度，或者元素的个数
print(len(tup1))
# 4.min()  # 获取元祖中值最小的元素
print(min(tup1))
# 5.max()  # 获取元祖中值最大的元素
print(max(tup1))

2.判定

# in 和 not in
print('JavaScript' in tup1)
print('JavaScript' not in tup1)

3.比较

# 元祖比较标准：先针对每个元素逐一比较，然后在比较长短
# 直接通过比较符来比较列表大小
tup2 = (1, 2, 3)
tup3 = (2, 3, 4)
tup4 = (2, 3)
print(tup2 > tup4)  # 优先比较元素大小
print(tup3 > tup4)

4.拆包

a = 1
b = 2
c = 3
tup5 = (a, b, c)
print(tup5[0], tup5[1], tup5[2])  # 通过下标取值

a, b, c = (1, 2, 3)
print(a, b, c)

a, b, c = 1, 2, 3
print(a, b, c)