{"id":118085,"date":"2026-10-26T06:48:19","date_gmt":"2026-10-25T22:48:19","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/118085.html"},"modified":"2026-10-26T06:48:19","modified_gmt":"2026-10-25T22:48:19","slug":"csv%e5%af%bc%e5%87%ba%e5%90%8enone%e4%b8%8e%e7%a9%ba%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bf%98%e8%83%bd%e5%88%86%e5%bc%80%e5%90%97%ef%bc%9a%e5%85%88%e7%ba%a6%e5%ae%9a%e7%bc%ba%e5%a4%b1%e6%a0%87%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/118085.html","title":{"rendered":"CSV\u5bfc\u51fa\u540eNone\u4e0e\u7a7a\u5b57\u7b26\u4e32\u8fd8\u80fd\u5206\u5f00\u5417\uff1a\u5148\u7ea6\u5b9a\u7f3a\u5931\u6807\u8bb0"},"content":{"rendered":"

\u5927\u5bb6\u597d，\u6211\u662f SiKi\u8001\u5e08\u3002\u6e38\u620f\u914d\u7f6e\u8868\u91cc\u6709\u7684\u5b57\u6bb5\u8868\u793a\u201c\u6ca1\u586b\u201d，\u6709\u7684\u8868\u793a\u201c\u586b\u4e86\u4f46\u5185\u5bb9\u4e3a\u7a7a\u201d\u3002\u5de5\u5177\u7528\u6807\u51c6\u5e93 csv \u5bfc\u51fa\u540e\u518d\u8bfb\u56de\u6765，\u8fd9\u4e24\u79cd\u60c5\u51b5\u5374\u5206\u4e0d\u5f00\u4e86\u3002\u5148\u522b\u6539\u4e1a\u52a1\u903b\u8f91，\u6211\u4f1a\u5148\u6253\u5370\u5199\u51fa\u7684\u6587\u672c\u548c\u8bfb\u56de\u7684\u7c7b\u578b，\u518d\u51b3\u5b9a\u8981\u4e0d\u8981\u5f15\u5165\u660e\u786e\u7684\u7f3a\u5931\u6807\u8bb0\u3002<\/p>\n

\u672c\u6587\u5728 Linux \u4e0a\u7684 Python 3.12.15 \u4e2d\u4f7f\u7528\u6807\u51c6\u5e93 csv \u4e0e io，\u53e6\u7528 3.13.5 \u590d\u8dd1\u540c\u4e00\u811a\u672c\u3002\u6837\u4f8b\u5168\u90e8\u81ea\u62df，\u53ea\u5728\u5185\u5b58\u4e2d\u5f80\u8fd4，\u4e0d\u8bfb\u5199\u771f\u5b9e\u914d\u7f6e\u8868，\u4e5f\u6ca1\u6709\u6d4b\u8bd5 Unity\u3001Godot \u7684\u5bfc\u5165\u3002\u4e0b\u9762\u8ba8\u8bba\u7684\u662f\u5de5\u5177\u7aef\u7684 CSV \u5f80\u8fd4\u7ea6\u5b9a，\u4e0d\u662f\u5f15\u64ce\u7edf\u4e00\u89c4\u5b9a\u3002\u5b98\u65b9\u5728\u7ebf\u6587\u6863\u6807\u6ce8\u7684\u5c0f\u7248\u672c\u662f 3.12.15，\u4e0e\u672c\u673a 3.12.15 \u4e00\u81f4；3.13.5 \u4ec5\u7528\u4e8e\u5bf9\u7167\u9605\u8bfb\u5668\u884c\u4e3a\u3002<\/p>\n

\u4e00 \u9ed8\u8ba4\u5199\u5165\u4f1a\u628a None \u5199\u6210\u7a7a\u5b57\u6bb5<\/h3>\n

\u51c6\u5907\u4e00\u884c\u540c\u65f6\u5305\u542b\u7f3a\u5931\u3001\u7a7a\u5b57\u7b26\u4e32\u3001\u666e\u901a\u6587\u672c\u548c\u6574\u6570：<\/p>\n

import<\/span> csv
\nimport<\/span> io<\/p>\n

def<\/span> dump_row<\/span>(<\/span>row,<\/span> **<\/span>kwargs)<\/span>:<\/span>
\n buf =<\/span> io.<\/span>StringIO(<\/span>)<\/span>
\n csv.<\/span>writer(<\/span>buf,<\/span> **<\/span>kwargs)<\/span>.<\/span>writerow(<\/span>row)<\/span>
\n return<\/span> buf.<\/span>getvalue(<\/span>)<\/span><\/p>\n

def<\/span> load_row<\/span>(<\/span>text,<\/span> **<\/span>kwargs)<\/span>:<\/span>
\n return<\/span> next<\/span>(<\/span>csv.<\/span>reader(<\/span>io.<\/span>StringIO(<\/span>text)<\/span>,<\/span> **<\/span>kwargs)<\/span>)<\/span><\/p>\n

sample =<\/span> [<\/span>None<\/span>,<\/span> ""<\/span>,<\/span> "forest"<\/span>,<\/span> 3<\/span>]<\/span>
\ntext =<\/span> dump_row(<\/span>sample)<\/span>
\nback =<\/span> load_row(<\/span>text)<\/span>
\nprint<\/span>(<\/span>repr<\/span>(<\/span>text)<\/span>)<\/span>
\nprint<\/span>(<\/span>back)<\/span>
\nprint<\/span>(<\/span>[<\/span>type<\/span>(<\/span>c)<\/span>.<\/span>__name__ for<\/span> c in<\/span> back]<\/span>)<\/span><\/p>\n

\u672c\u5730\u8f93\u51fa\u662f ',,forest,3\\\\r\\\\n'\u3001['', '', 'forest', '3'] \u548c ['str', 'str', 'str', 'str']\u3002None \u4e0e "" \u5199\u51fa\u540e\u90fd\u53d8\u6210\u7a7a\u5b57\u6bb5，\u8bfb\u56de\u6765\u90fd\u662f\u7a7a\u5b57\u7b26\u4e32，\u539f\u6765\u7684 None \u518d\u4e5f\u56de\u4e0d\u6765\u3002\u6574\u6570 3 \u4e5f\u4f1a\u5148\u53d8\u6210\u6587\u672c "3"，\u8fd9\u662f CSV \u8bfb\u5199\u7684\u5e38\u89c1\u7ed3\u679c，\u4e0d\u662f\u8fd9\u6b21\u95ee\u9898\u7684\u91cd\u70b9\u3002<\/p>\n

\u5b98\u65b9\u6587\u6863\u5199\u5f97\u5f88\u76f4\u63a5：\u4e3a\u4e86\u65b9\u4fbf\u5bf9\u63a5\u6570\u636e\u5e93\u63a5\u53e3，\u5199\u5165\u65f6\u4f1a\u628a None \u5199\u6210\u7a7a\u5b57\u7b26\u4e32；\u8fd9\u4e0d\u662f\u53ef\u9006\u53d8\u6362\u3002\u9ed8\u8ba4\u9605\u8bfb\u5668\u4e5f\u4e0d\u505a\u7c7b\u578b\u8fd8\u539f，\u6bcf\u4e2a\u5b57\u6bb5\u90fd\u662f\u5b57\u7b26\u4e32\u3002\u6240\u4ee5\u201c\u5bfc\u51fa\u540e\u518d\u5bfc\u5165\u8fd8\u80fd\u533a\u5206\u7f3a\u5931\u548c\u7a7a\u503c\u201d，\u5e76\u4e0d\u662f\u9ed8\u8ba4\u65b9\u8a00\u80fd\u4fdd\u8bc1\u7684\u3002<\/p>\n

\u4e8c \u5355\u72ec\u5b57\u6bb5\u3001\u5047\u503c\u548c\u5176\u4ed6\u6587\u672c\u4e5f\u4e0d\u8981\u6df7\u7740\u731c<\/h3>\n

\u518d\u770b\u51e0\u79cd\u5bb9\u6613\u8bef\u5224\u7684\u5355\u5b57\u6bb5\u5199\u51fa\u7ed3\u679c：<\/p>\n

for<\/span> value in<\/span> (<\/span>None<\/span>,<\/span> ""<\/span>,<\/span> False<\/span>,<\/span> 0<\/span>,<\/span> "None"<\/span>,<\/span> "null"<\/span>)<\/span>:<\/span>
\n text =<\/span> dump_row(<\/span>[<\/span>value]<\/span>)<\/span>
\n print<\/span>(<\/span>repr<\/span>(<\/span>value)<\/span>,<\/span> "=>"<\/span>,<\/span> repr<\/span>(<\/span>text)<\/span>,<\/span> load_row(<\/span>text)<\/span>)<\/span><\/p>\n

\u672c\u5730\u91cc None \u548c "" \u90fd\u5199\u6210 '""\\\\r\\\\n'，\u8bfb\u56de\u90fd\u662f ['']\u3002False \u5199\u6210 False，0 \u5199\u6210 0，\u5b57\u7b26\u4e32 "None"\u3001"null" \u5219\u539f\u6837\u4fdd\u7559\u3002\u5b83\u4eec\u770b\u8d77\u6765\u50cf\u201c\u7a7a\u201d\u6216\u201c\u65e0\u201d，\u4f46\u5199\u51fa\u7684\u6587\u672c\u5e76\u4e0d\u76f8\u540c，\u4e5f\u4e0d\u80fd\u4e92\u76f8\u66ff\u4ee3\u3002<\/p>\n

\u6211\u4f1a\u628a\u8fd9\u4e9b\u6837\u4f8b\u653e\u8fdb\u56de\u5f52\u8868，\u800c\u4e0d\u662f\u5728\u6392\u9519\u65f6\u4e34\u65f6\u7528 if not cell \u4e00\u5200\u5207\u3002\u7a7a\u5b57\u7b26\u4e32\u4e3a\u5047，\u975e\u7a7a\u7684 "False"\u3001"0"\u3001"None" \u4e3a\u771f；\u82e5\u518d\u548c\u4e1a\u52a1\u91cc\u7684\u201c\u672a\u914d\u7f6e\u201d\u6df7\u7528，\u65e5\u5fd7\u4f1a\u53d8\u5f97\u5f88\u96be\u8bfb\u3002\u672c\u6587\u6ca1\u6709\u628a\u8fd9\u4e9b\u6587\u672c\u81ea\u52a8\u8fd8\u539f\u6210\u5e03\u5c14\u6216\u6570\u5b57\u3002<\/p>\n

\u4e09 3.12 \u7684 QUOTE_NOTNULL：\u5199\u51fa\u80fd\u5206，\u8bfb\u56de\u4ecd\u53ef\u80fd\u5408<\/h3>\n

\u4ece 3.12 \u8d77，\u6807\u51c6\u5e93\u589e\u52a0\u4e86 QUOTE_NOTNULL \u548c QUOTE_STRINGS\u3002\u7528\u524d\u8005\u5199\u51fa\u65f6，None \u4ecd\u662f\u672a\u52a0\u5f15\u53f7\u7684\u7a7a\u5b57\u6bb5，\u771f\u6b63\u7684\u7a7a\u5b57\u7b26\u4e32\u4f1a\u88ab\u52a0\u4e0a\u5f15\u53f7：<\/p>\n

text =<\/span> dump_row(<\/span>[<\/span>None<\/span>,<\/span> ""<\/span>,<\/span> "x"<\/span>]<\/span>,<\/span> quoting=<\/span>csv.<\/span>QUOTE_NOTNULL)<\/span>
\nprint<\/span>(<\/span>repr<\/span>(<\/span>text)<\/span>)<\/span>
\nprint<\/span>(<\/span>load_row(<\/span>text,<\/span> quoting=<\/span>csv.<\/span>QUOTE_NOTNULL)<\/span>)<\/span><\/p>\n

\u672c\u5730 3.12.15 \u5f97\u5230 ',"","x"\\\\r\\\\n'，\u8bfb\u56de\u5374\u662f ['', '', 'x']，\u4e24\u4e2a\u5b57\u6bb5\u4ecd\u7136\u90fd\u662f\u7a7a\u5b57\u7b26\u4e32\u3002\u5b98\u65b9\u6587\u6863\u6ce8\u660e：\u7531\u4e8e\u7f3a\u9677，\u8fd9\u4e24\u4e2a\u5e38\u91cf\u5728 3.12 \u4e2d\u4e0d\u5f71\u54cd reader；\u8be5\u95ee\u9898\u5728 3.13 \u4fee\u590d\u3002\u6211\u7528 3.13.5 \u590d\u8dd1\u540c\u4e00\u6bb5，\u8bfb\u56de\u5f97\u5230 [None, '', 'x']，\u5199\u51fa\u4fa7\u624d\u80fd\u548c\u8bfb\u56de\u4fa7\u5bf9\u9f50\u3002<\/p>\n

\u56e0\u6b64，\u82e5\u56e2\u961f\u4ecd\u505c\u7559\u5728 3.12，\u4e0d\u80fd\u53ea\u6539 quoting \u5c31\u5ba3\u79f0\u201c\u5f80\u8fd4\u53ef\u533a\u5206\u201d\u3002\u8981\u4e48\u5347\u7ea7\u5230\u5df2\u4fee\u590d\u9605\u8bfb\u5668\u7684\u7248\u672c\u5e76\u505a\u9a8c\u6536，\u8981\u4e48\u5728\u4e1a\u52a1\u5c42\u4f7f\u7528\u4e0b\u4e00\u8282\u7684\u663e\u5f0f\u6807\u8bb0\u3002\u672c\u6587\u6ca1\u6709\u9a8c\u8bc1 Excel\u3001Google \u8868\u683c\u6216\u5176\u4ed6\u8f6f\u4ef6\u662f\u5426\u8bc6\u522b\u8fd9\u79cd\u5f15\u53f7\u5dee\u5f02\u3002<\/p>\n

\u56db \u7528\u663e\u5f0f\u7f3a\u5931\u6807\u8bb0\u505a\u4e1a\u52a1\u5f80\u8fd4<\/h3>\n

\u5982\u679c\u534f\u8bae\u5141\u8bb8，\u628a\u201c\u7f3a\u5931\u201d\u7f16\u7801\u6210\u4e00\u4e2a\u4e0d\u4f1a\u4e0e\u771f\u5b9e\u5185\u5bb9\u51b2\u7a81\u7684\u6807\u8bb0，\u7a7a\u5b57\u7b26\u4e32\u7ee7\u7eed\u8868\u793a\u201c\u6709\u5b57\u6bb5\u4f46\u4e3a\u7a7a\u201d：<\/p>\n

MISSING =<\/span> "__MISSING__"<\/span><\/p>\n

def<\/span> encode_optional<\/span>(<\/span>value)<\/span>:<\/span>
\n if<\/span> value is<\/span> None<\/span>:<\/span>
\n return<\/span> MISSING
\n if<\/span> type<\/span>(<\/span>value)<\/span> is<\/span> not<\/span> str<\/span>:<\/span>
\n raise<\/span> TypeError(<\/span>type<\/span>(<\/span>value)<\/span>.<\/span>__name__)<\/span>
\n return<\/span> value<\/p>\n

def<\/span> decode_optional<\/span>(<\/span>cell)<\/span>:<\/span>
\n if<\/span> cell ==<\/span> MISSING:<\/span>
\n return<\/span> None<\/span>
\n return<\/span> cell<\/p>\n

optional =<\/span> [<\/span>None<\/span>,<\/span> ""<\/span>,<\/span> "forest"<\/span>]<\/span>
\nencoded =<\/span> [<\/span>encode_optional(<\/span>v)<\/span> for<\/span> v in<\/span> optional]<\/span>
\ntext =<\/span> dump_row(<\/span>encoded)<\/span>
\nrestored =<\/span> [<\/span>decode_optional(<\/span>c)<\/span> for<\/span> c in<\/span> load_row(<\/span>text)<\/span>]<\/span>
\nprint<\/span>(<\/span>repr<\/span>(<\/span>text)<\/span>)<\/span>
\nprint<\/span>(<\/span>restored)<\/span><\/p>\n

\u672c\u5730\u8f93\u51fa '__MISSING__,,forest\\\\r\\\\n' \u548c [None, '', 'forest']\u3002\u5f80\u8fd4\u540e\u4e0e\u539f\u5217\u8868\u76f8\u7b49，\u8f93\u5165\u5217\u8868\u4e5f\u6ca1\u6709\u88ab\u4fee\u6539\u3002\u6807\u8bb0\u5b57\u7b26\u4e32\u8981\u5199\u8fdb\u534f\u8bae，\u5e76\u7981\u6b62\u4e1a\u52a1\u6570\u636e\u4f7f\u7528\u540c\u4e00\u4e2a\u8bb0\u53f7；\u9700\u8981\u8f6c\u4e49\u6216\u6362\u8bb0\u53f7\u65f6，\u5e94\u5148\u6539\u534f\u8bae\u518d\u6539\u4ee3\u7801\u3002<\/p>\n

DictWriter \u4e5f\u6709\u7c7b\u4f3c\u9677\u9631：\u7f3a\u952e\u65f6\u82e5 restval=""，\u5199\u51fa\u7a7a\u5b57\u6bb5；\u663e\u5f0f\u4f20\u5165 None \u65f6，\u9ed8\u8ba4\u5199\u5165\u540c\u6837\u53d8\u6210\u7a7a\u5b57\u6bb5\u3002\u672c\u5730\u7528 id,note \u4e24\u5217\u9a8c\u8bc1，\u7f3a note \u4e0e note=None \u5f97\u5230\u7684\u6587\u672c\u90fd\u662f\u7a7a\u503c\u884c\u3002\u8981\u533a\u5206\u201c\u952e\u4e0d\u5b58\u5728\u201d\u548c\u201c\u503c\u662f None\u201d，\u540c\u6837\u9700\u8981\u534f\u8bae，\u800c\u4e0d\u662f\u4f9d\u8d56\u9ed8\u8ba4\u5199\u5165\u3002<\/p>\n

\u4e94 \u56de\u5f52\u65f6\u5bf9\u7167\u6587\u672c\u3001\u7c7b\u578b\u548c\u534f\u8bae<\/h3>\n

\u672c\u6b21\u72ec\u7acb\u9a8c\u8bc1\u8986\u76d6\u9ed8\u8ba4\u5199\u5165\u5408\u5e76\u3001\u5355\u5b57\u6bb5\u6df7\u6dc6\u3001False\/0 \u4e0e\u7f3a\u5931\u4e0d\u540c\u3001QUOTE_NOTNULL \u5199\u51fa\u5dee\u5f02\u30013.12 \u9605\u8bfb\u5668\u9650\u5236\u30013.13 \u5bf9\u7167\u3001\u54e8\u5175\u5f80\u8fd4\u3001DictWriter \u7f3a\u952e\u4e0e None，\u4ee5\u53ca\u8f93\u5165\u672a\u88ab\u4fee\u6539\u3002\u5168\u8fc7\u7a0b\u53ea\u5728\u5185\u5b58\u4e2d\u8fd0\u884c，\u4e0d\u6d89\u53ca\u7f51\u7edc\u3001\u6570\u636e\u5e93\u6216\u5f15\u64ce\u5bfc\u5165\u3002<\/p>\n

\u63a5\u624b\u914d\u7f6e\u5bfc\u51fa\u5de5\u5177\u65f6，\u53ef\u4ee5\u5148\u51c6\u5907\u4e00\u884c\u540c\u65f6\u542b None \u548c "" \u7684\u6837\u4f8b，\u505a\u4e00\u6b21\u5199\u51fa\u518d\u8bfb\u56de，\u6253\u5370 repr \u548c\u7c7b\u578b\u3002\u7b2c\u4e00\u5904\u65e0\u6cd5\u533a\u5206\u7684\u4f4d\u7f6e，\u6bd4\u5728\u5173\u5361\u7f16\u8f91\u5668\u91cc\u731c\u201c\u8fd9\u4e2a\u7a7a\u662f\u4e0d\u662f\u6ca1\u914d\u201d\u66f4\u7701\u65f6\u95f4\u3002\u534f\u8bae\u5199\u6e05\u4e4b\u540e，\u518d\u51b3\u5b9a\u662f\u5426\u5347\u7ea7\u5230 3.13 \u7684\u9605\u8bfb\u5668\u884c\u4e3a，\u6216\u7ee7\u7eed\u4f7f\u7528\u663e\u5f0f\u6807\u8bb0\u3002<\/p>\n

\u4f60\u9047\u5230\u7684\u662f\u5bfc\u51fa\u540e\u7f3a\u5931\u548c\u7a7a\u503c\u5206\u4e0d\u5f00，\u8fd8\u662f\u8868\u683c\u8f6f\u4ef6\u628a\u5f15\u53f7\u5403\u6389\u4e86？\u7ed9\u51fa\u4e00\u884c\u81ea\u62df\u6837\u4f8b\u548c\u4f60\u7528\u7684 Python \u5c0f\u7248\u672c，\u5c31\u80fd\u5f00\u59cb\u6392\u67e5，\u4e0d\u9700\u8981\u4e0a\u4f20\u771f\u5b9e\u914d\u7f6e\u8868\u3002<\/p>\n

\u4f9d\u636e：Python 3.12 csv \u5b98\u65b9\u6587\u6863\u4e2d writer \u5bf9 None \u5199\u6210\u7a7a\u5b57\u7b26\u4e32\u3001\u4ee5\u53ca QUOTE_NOTNULL \/ QUOTE_STRINGS（\u542b 3.12 reader \u7f3a\u9677\u8bf4\u660e）\u7684\u63cf\u8ff0\u3002\u793a\u4f8b\u548c\u8868\u8fbe\u539f\u521b，\u4e0d\u5f15\u7528\u5177\u4f53\u8bfe\u7a0b\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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