Question

我正在查看项目是否在列表列表中。

List1 = [['a','b','c'],['d','e','f'],['g','h','i']]

如果b在列表中的任何列表中，则打印True。否则，打印False。

执行此操作的Python方法是什么？

Answer 1

尝试一下：

# check element exists in list of list or not? 
result = any("b" in sublist for sublist in List1) 

# printing result 
print(str(result))

Answer 2

我扮演傻瓜...

<source>: In function 'int main()':
<source>:44:29: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   44 |     Lebensmittel bananen(2, "Bananen", 0.75);
      |                             ^~~~~~~~~
<source>:55:22: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   55 |     Moebel schraenke("Schraenke", 250.0);
      |                      ^~~~~~~~~~~

检查项目是否在列表中

2 个答案: