Python 组合条件运算符 : if AA in Y or BB in Y and not B in Y

Question

我想将此代码运行为“if 'Britain' or 'UK' in string do stuff, but don't do stuff if "Ex UK" 在字符串中":

#Case insensitive wrapper - equivalent to if X in Y
def case_in(phrase, string):
    return phrase.lower() in string.lower()

name = "Developed Europe Ex UK Property"

#This is the relevant part
if case_in("Britain", name) or case_in(" UK ", name) and not case_in("Ex UK", name):
    geofocusregion = "Europe"
    geofocuscountry = "GB"
    fundcurrency = "GBP"

但是，对于包含 "Ex UK" 的字符串，它仍然会设置变量，例如geofocuscountry = GB。

Answer 1

在 python 中 the precedence and 高于 or 因此您需要将前 2 个条件放在括号内。

if (case_in("Britain", name) or case_in(" UK ", name)) and not case_in("Ex UK", name):