Question

如何扩展以下if语句，以便逻辑包含else子句。伪代码的功能如下。

Ideal_Singers =包含'（Beatle）'和（'Paul'，'Yoko'或'Ringo'）的每个名字
如果列表中的所有名称都不符合这些条件，则Ideal_Singers =包含'Mick'的每个名称

到目前为止，我有这段代码：

Names = ["John Lennon (Beatle)",  "Paul McCartney (Beatle)", "Ringo Starr (Beatle)", "Yoko Ono (Beatle)", "Mick Jagger (Rolling Stone)", "Brian Jones (Rolling Stone)", "Alex Jones (na)", "Adam Smith (na)"]
Ideal_Singers = [n for n in Names if "Beatle" in n and ("Paul" in n or "Ringo" in n or "Yoko" in n)]
print Ideal_Singers

Answer 1

您可以使用any：

names = ["John Lennon (Beatle)",  "Paul McCartney (Beatle)", "Ringo Starr (Beatle)", "Yoko Ono (Beatle)", "Mick Jagger (Rolling Stone)", "Brian Jones (Rolling Stone)", "Alex Jones (na)", "Adam Smith (na)"]
names1 = [i for i in names if any(b in i for b in ['(Beatle)', 'Paul', 'Yoko','Ringo'])]
ideal_names = names1 or [i for i in names if 'Mick' in i]

输出：

['John Lennon (Beatle)', 'Paul McCartney (Beatle)', 'Ringo Starr (Beatle)', 'Yoko Ono (Beatle)']

Answer 2

这是符合您标准的解决方案：

cultofcoders:redis-oplog

基本上我制作两个列表，一个用于披头士乐队的条件，一个用于米克条件。然后我把第一个非空的列表。

输出：

Names = [
    "John Lennon (Beatle)", 
    "Paul McCartney (Beatle)",
    "Ringo Starr (Beatle)",
    "Yoko Ono (Beatle)",
    "Mick Jagger (Rolling Stone)",
    "Brian Jones (Rolling Stone)",
    "Alex Jones (na)",
    "Adam Smith (na)"
]
allowed_beatles = ["Paul", "Ringo", "Yoko"]
Ideal_Singers = [
    x for x in [
        [n for n in Names if "Beatle" in n and any(b in n for b in allowed_beatles)],
        [n for n in Names if 'Mick' in n]
    ]
    if x
]

Ideal_Singers = Ideal_Singers[0] if Ideal_Singers else []
print Ideal_Singers

扩展'if语句'以包含else子句

2 个答案: