Python：匹配每個多個列表中的多個變量

Question

我可以知道如何將多個字符串與多個列表進行匹配？我運行了代碼，但它並沒有給我'BEC'作爲結果，爲什麼？

a = ["A", "B", "C"] 
b = ["AB","BB"] 
c = ["ABC","BCD","BEC"] 

av, bv, cv = 'B', 'AB', 'BEC' 

for _a, _b, _c in zip(a,b,c): 
    if _a == av and _b == bv and _c == cv: 
     print cv # 'BEC' 

Answer 1

最簡單的方法：用

if a in a and bv in b and cv in c: print cv 

all方式：

all((av in a, bv in b, cv in c)) 

令人費解all方式的樂趣：

_lists = [a,b,c] 
all(value in _lists[i] for i, value in enumerate([av,bv,cv])) 

Answer 2

from itertools import product 
a = ["A", "B", "C"] 
b = ["AB","BB"] 
c = ["ABC","BCD","BEC"] 

av, bv, cv = 'B', 'AB', 'BEC' 
for _a, _b, _c in product(a,b,c): 
    if _a == av and _b == bv and _c == cv: 
     print cv # 'BEC'