seo \u6807\u9898\uff1a\u6ce8\u610f\uff0cpython \u7684\u9519\u8bef\u6355\u6349\u4f1a\u8986\u76d6\u540c\u540d\u7684\u53d8\u91cf\uff0c\u5bfc\u81f4 UnboundLocalError: local variable ‘error’ referenced before assignment<\/p>\n
\u53d1\u73b0\u4e00\u4e2a\u95ee\u9898\uff0c\u5982\u679c\u6211\u5728\u4e00\u4e2a\u51fd\u6570\u91cc\u9762\uff0c\u60f3\u628a\u662f\u4ec0\u4e48\u9519\u8bef\u4e5f\u7ed9\u8fd4\u56de\u7684\u8bdd\uff0c\u4e5f\u4f1a\u9047\u5230 UnboundLocalError: local variable ‘error’ referenced before assignment \u62a5\u9519<\/p>\n
def parse():\n assert False\n\n\ndef main():\n error = None\n try:\n parse()\n except Exception as error:\n pass\n return error\n\n\nif __name__ == "__main__":\n main()\n<\/code><\/pre>\n\u8fd0\u884c\u62a5\u9519<\/p>\n
Traceback (most recent call last):\n File "\/home\/pon\/code\/me\/ideaboom\/dddd\/1.py", line 16, in <module>\n main()\n File "\/home\/pon\/code\/me\/ideaboom\/dddd\/1.py", line 12, in main\n return error\nUnboundLocalError: local variable 'error' referenced before assignment<\/code><\/pre>\n\u56e0\u4e3a except Exception as error \u4e2d\u7684 error \u4f1a\u8986\u76d6\u4e00\u5f00\u59cb\u7684 error = None\uff0c\u4f46\u662f except Exception as error \u4e2d\u7684 error \u7684\u4f5c\u7528\u57df\u53ea\u6709\u5728 try except \u4e2d\uff0c\u5bfc\u81f4 try except \u6267\u884c\u5b8c\u6bd5\u4e4b\u540e\uff0cerror \u5c31\u88ab\u91ca\u653e\u4e0d\u53ef\u8bbf\u95ee\u5230\u4e86\uff0c\u4ece\u800c\u5bfc\u81f4 return error \u7684\u65f6\u5019\uff0c\u62a5\u9519 UnboundLocalError \u4e86<\/p>\n
\u975e\u5e38\u7684\u65e0\u8bed\uff0c\u611f\u89c9\u662f cpython \u7684\u903b\u8f91\u6f0f\u6d1e<\/p>\n
\u6d4b\u8bd5\u4e86 cpython3.8-cpython3.13 \u90fd\u5b58\u5728\u8fd9\u4e2a\u95ee\u9898\uff0c\u770b\u6765\u53ea\u80fd\u63a5\u53d7\u907f\u514d\u4e86\uff0c\u5c31\u5f53\u505a cpython \u7684\u7279\u6027\u7b97\u4e86<\/p>\n