Python 文档中的这种语法叫什么? 怎么阅读?

Question

2016/11/24

问题

由于是 unknown knowledge

无奈连关键词都不知道组织 ( 它的作用还是知道的: 定义一般形式 )

相关代码

try_stmt  ::=  try1_stmt | try2_stmt
try1_stmt ::=  "try" ":" suite
               ("except" [expression [("as" | ",") identifier]] ":" suite)+
               ["else" ":" suite]
               ["finally" ":" suite]
try2_stmt ::=  "try" ":" suite
               "finally" ":" suite

上下文环境

1. Python 官方doc

尝试解决

Answer 1

BNF 패러다임
은 언어의 문법을 기술한 언어라고 생각하면 됩니다
전송
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