a = "[abc]def - aaa" # key = "abc" value = "def - aaa"
a2 = "[_abc def]def - aaa" # key = "_abc def" value = "def - aaa"
b = "[abc]"
c = "abc]" # key = "abc" value = ""
d = "[abc]]def/acd" # key = "abc" value = "def/acd"
f = "abc]]" # key = "abc" value = ""
a = "[abc]def - aaa" # key = "abc" value =
阅读背景：
正则表达式提取括号括起来的键
来源：互联网
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