为什么+改成,就不行了？

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#1 Created at ... [Delete] [Delete and Lock User]

d={'q':'w','w':'r'} L=[k,'=',v for k,v in d.items()] File "<stdin>", line 1 L=[k,'=',v for k,v in d.items()] ^ SyntaxError: invalid syntax

#2 Created at ... [Delete] [Delete and Lock User]

'+' 代表拼接字符串，而 ',' 一般是参数的分隔符。列表生成式没有多个参数的语法，所以就不行喽。

错误提示：SyntaxError: invalid syntax（语法错误）

#3 Created at ... [Delete] [Delete and Lock User]

多谢解答！