{"id":418825,"date":"2021-03-17T02:07:03","date_gmt":"2021-03-16T18:07:03","guid":{"rendered":"http:\/\/4563.org\/?p=418825"},"modified":"2021-03-17T02:07:03","modified_gmt":"2021-03-16T18:07:03","slug":"python-%e8%af%bb%e5%86%99%e6%96%87%e4%bb%b6%e6%97%b6%e4%b8%8d%e7%94%a8-with-%e4%b9%9f%e4%b8%8d%e5%85%b3%e9%97%ad%e6%96%87%e4%bb%b6%ef%bc%8c%e8%bf%99%e6%a0%b7%e7%9a%84%e9%a3%8e%e6%a0%bc%e5%a5%bd","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=418825","title":{"rendered":"Python \u8bfb\u5199\u6587\u4ef6\u65f6\u4e0d\u7528 with \u4e5f\u4e0d\u5173\u95ed\u6587\u4ef6\uff0c\u8fd9\u6837\u7684\u98ce\u683c\u597d\u5417\uff1f"},"content":{"rendered":"
\n
\n
\n

Python \u8bfb\u5199\u6587\u4ef6\u65f6\u4e0d\u7528 with \u4e5f\u4e0d\u5173\u95ed\u6587\u4ef6\uff0c\u8fd9\u6837\u7684\u98ce\u683c\u597d\u5417\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : zictos <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u8bfb\u6587\u4ef6\uff1a<\/p>\n

text = open('test.txt', 'r', encoding='utf-8').read() <\/code><\/pre>\n
\u5199\u6587\u4ef6:<\/p>\n
open('test.txt', 'w', encoding='utf-8').write('123') <\/code><\/pre>\n
\u904d\u5386\u6587\u4ef6:<\/p>\n
for i in open('test.txt', 'r', encoding='utf-8'):     print(i) <\/code><\/pre>\n
.
 . <\/p>\n
\u53d1\u73b0\u6709\u65f6\u5019\u53ea\u662f\u4e34\u65f6\u8bfb\u4e00\u4e0b\u6587\u4ef6\u7684\u8bdd\u8fd9\u6837\u65b9\u4fbf\u4e0d\u5c11\u3002 <\/p>\n
\u5982\u679c\u6253\u5f00\u6587\u4ef6\uff0c\u4f46\u6ca1\u6709\u628a\u6587\u4ef6\u5bf9\u8c61\u8d4b\u503c\u5230\u53d8\u91cf\u7684\u8bdd\u662f\u4e0d\u9700\u8981\u5173\u95ed\u6587\u4ef6\u7684
 \u6bd4\u5982\u8f93\u5165\u4e0b\u9762\u4e00\u884c\u4ee3\u7801\u7684\u65f6\u5019\u53bb\u5220\u9664 test.txt \u6587\u4ef6\u65f6\u65e0\u6cd5\u5220\u9664\uff0c\u63d0\u793a\u88ab\u5360\u7528<\/p>\n
f = open('test.txt', 'r', encoding='utf-8')   <\/code><\/pre>\n
\u4f46\u5b9e\u9645\u4e0a\u5e76\u4e0d\u9700\u8981\u8f93\u5165 f.close()\uff0c\u6bd4\u5982\u76f4\u63a5\u7ed9 f \u8d4b\u503c\u6210\u522b\u7684\u6570\u636e\u7c7b\u578b f=1\uff0c\u518d\u53bb\u5220\u9664\u6587\u4ef6\u5c31\u4e0d\u4f1a\u63d0\u793a\u5360\u7528\u4e86<\/p>\n
f = 1   <\/code><\/pre>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (39<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ClericPy <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 Explicit is better than implicit.                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : learningman <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u90fd\u6709\u4e0a\u4e0b\u6587\u7ba1\u7406\u5668\u8fd9\u4e48\u597d\u7528\u7684\u4e1c\u897f\u4e86\uff0c\u4f60\u8fd8\u5acc\u9ebb\u70e6\u3002\u3002\u3002
    \u8981\u4e0d\u518d\u5c01\u88c5\u6210\u4e00\u4e2a\u51fd\u6570\uff0c\u4f20\u5165\u6587\u4ef6\u540d\u8fd4\u56de\u503c\uff0c\u5185\u90e8\u505a\u597d\u5904\u7406\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : AndyAO <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e34\u65f6\u8bfb\u4e00\u4e0b\u6587\u4ef6\u6ca1\u5fc5\u8981\u5173\u95ed\uff0c\u5c31\u90a3\u70b9\u8d44\u6e90\u6839\u672c\u5c31\u6ca1\u5fc5\u8981\u91ca\u653e                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : v2sir <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 f = 1 
     \u89e6\u53d1\u4e86 python \u56de\u6536\u673a\u5236                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ljpCN <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5f97\u770b\u4e0b f.close \u5230\u5e95\u505a\u4e86\u4ec0\u4e48\uff0c\u76f4\u89c9\u4e0a\u611f\u89c9\u4e0d\u8c03\u7528\u4f1a\u5185\u5b58\u6cc4\u6f0f\u3002\u53e6\u5916\uff0c\u66f4\u60f3\u77e5\u9053\u7684\u662f\u7528 with \u548c\u624b\u52a8\u8c03 close \u54ea\u4e2a\u662f\u66f4\u597d\u7684\u5b9e\u8df5\u5462\uff1f\u524d\u8005\u5c11\u5199\u4e86\u4ee3\u7801\u7701\u5fc3\u4e86\u4f46\u591a\u4e86\u4e00\u5c42\u7f29\u8fdb\u3002\u5982\u679c\u8981\u5728\u8fc7\u7a0b\u4e2d\u6253\u5f00\u591a\u4e2a\u6587\u4ef6\u5c31\u7f29\u5f97\u66f4\u591a\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : geelaw <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd9\u6837\u7684\u5199\u6cd5\u5728\u6807\u51c6 Python \u4e2d\u53ef\u4ee5\u5bfc\u81f4\u6587\u4ef6\u5728\u8fdb\u7a0b\u7ed3\u675f\u524d\u4e0d\u88ab\u5173\u95ed\uff0c\u56e0\u4e3a\u5728\u5185\u5b58\u5145\u8db3\u7684\u65f6\u5019\uff0c\u5783\u573e\u56de\u6536\u5668\u53ef\u4ee5\u9009\u62e9\u5b8c\u5168\u4e0d\u56de\u6536\u4e0d\u53ef\u8fbe\u5bf9\u8c61\u3002<\/p>\n
    \u5728\u76ee\u524d\u7684 CPython \u5b9e\u73b0\u4e2d\uff0c\u8fd9\u79cd\u5199\u6cd5\u53ef\u4ee5\u4fdd\u8bc1\u6587\u4ef6\u7acb\u523b\u88ab\u5173\u95ed\uff0c\u56e0\u4e3a CPython \u91c7\u7528\u5f15\u7528\u8ba1\u6570\u6765\u8f85\u52a9\u7ba1\u7406\u5185\u5b58\uff0c\u5f15\u7528\u8ba1\u6570\u5230\u8fbe 0 \u7684\u65f6\u5019\u4f1a\u7acb\u523b\u56de\u6536\uff0c\u4ece\u800c\u5173\u95ed\u6587\u4ef6\u3002<\/p>\n
    \u5728 IronPython \u4e2d\uff0c\u5219\u4e0d\u4e00\u5b9a\uff0c\u73b0\u5728 CLR \u63d0\u4f9b\u8981\u6c42\u6682\u65f6\u4e0d\u8fd0\u884c GC \u7684 API\uff0c\u5982\u679c\u5728\u8fd0\u884c\u8fd9\u6bb5\u4ee3\u7801\u524d\uff0c\u6709\u4eba commit \u4e86\u8db3\u591f\u7684\u5185\u5b58\u8981\u6c42\u4e0d\u8fd0\u884c GC\uff0c\u4e14\u8fd9\u6bb5\u4ee3\u7801\u4e4b\u540e\u7a0b\u5e8f\u4e0d\u518d\u5206\u914d\u5185\u5b58\uff0c\u5219\u6587\u4ef6\u6c38\u8fdc\u4e0d\u4f1a\u88ab\u5173\u95ed\u3002<\/p>\n
    \u4e0d\u8981\u9762\u5411\u5de7\u5408\u7f16\u7a0b\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : GrayXu <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u53d6\u51b3\u4e8e\u573a\u666f\uff0c\u5982\u679c\u4e0d\u9700\u8981\u5728\u67d0\u4e2a\u65f6\u523b\u4fdd\u8bc1\u8d44\u6e90\u88ab\u91ca\u653e\uff0c\u90a3\u9690\u5f0f\u5b8c\u6210\u5176\u5b9e\u4e5f\u53ef\u4ee5\u5427\u3002\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : lqf96 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @geelaw \u90fd\u4e0d\u9700\u8981 IronPython\uff0cPyPy \u5c31\u5df2\u7ecf\u706b\u846c\u573a\u4e86…                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zictos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5982\u679c\u4ec5\u4ec5\u662f\u7528 open(‘test.txt’, ‘r’, encoding=’utf-8′)\u6253\u5f00\u6587\u4ef6\uff0c\u4f46\u6ca1\u6709\u505a\u4efb\u4f55\u64cd\u4f5c\uff0c\u53d1\u73b0 test.txt \u6587\u4ef6\u662f\u65e0\u6cd5\u5220\u9664\u7684\u3002\u4f46\u53ea\u8981\u505a\u4e86\u522b\u7684\u64cd\u4f5c\u6216\u8005\u4e00\u5f00\u59cb\u8d4b\u503c\u7ed9\u4e86\u53d8\u91cf\u540e\u7eed\u53c8\u6539\u53d8\u4e86\u53d8\u91cf\u7684\u6570\u636e\u7c7b\u578b\u5c31\u53ef\u4ee5\u5220\u9664\u4e86\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zictos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @ljpCN #5 \u95ee\u9898\u5728\u4e8e\u6587\u4ef6\u80fd\u591f\u5220\u9664\u4e86\u5c31\u80af\u5b9a\u8bf4\u660e\u5185\u5b58\u5df2\u7ecf\u91ca\u653e\u4e86
    \u6709\u65f6\u5019\u6211\u53cd\u5012\u4e0d\u60f3\u770b\u5230 with \u7684\u7f29\u8fdb\uff0c\u56e0\u4e3a\u6211\u5c31\u662f\u8bfb\u53d6\u4e00\u4e0b\u6587\u4ef6\uff0c\u672c\u6765\u4e5f\u4e00\u4e24\u884c\u4ee3\u7801\u5c31\u53ef\u4ee5\u641e\u5b9a\u3002\u53ea\u662f\u7528 with \u7684\u786e\u4e0d\u5bb9\u6613\u5fd8\u8bb0 close\uff0c\u6548\u679c\u5e94\u8be5\u662f\u4e00\u6837\u7684\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : Contextualist <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5982\u679c\u53ea\u662f\u4e00\u6b21\u6027\u8bfb \/ \u5199\uff0c\u5efa\u8bae\u4f7f\u7528 pathlib\uff1a
    from pathlib import Path
    Path(‘test.txt’).write_text(‘123′, encoding=’utf-8’)
    text = Path(‘test.txt’).read_text(encoding=’utf-8′)<\/p>\n
    \u8fd9\u4e9b\u65b9\u6cd5\u90fd\u662f\u81ea\u5e26\u5173\u95ed\u6587\u4ef6\u7684\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : zhuangzhuang1988 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u63a5\u624b\u7684\u4eba \u770b\u4e86\u8981\u6d41\u6cea                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : webshe11 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @lqf96 #8 \u8bd5\u4e86\u4e00\u4e0b\uff0c\u786e\u5b9e\uff0cmacOS \u4e0b lsof \u53d1\u73b0 PyPy 7.3.3 \u4e0d\u4f1a\u81ea\u52a8\u5173\u95ed\uff0cCPython 3.9.2 2.7.17 \u90fd\u4f1a\u81ea\u52a8\u5173\u95ed\u6587\u4ef6
    \u4e2a\u4eba\u89c9\u5f97\u5c31\u5199\u4e2a with \u518d\u7f29\u8fdb\u4e00\u4e0b\u4e0d\u7b97\u9ebb\u70e6\uff0c\u5982\u679c\u5b9e\u5728\u5acc\u9ebb\u70e6\u53ef\u4ee5\u5c01\u88c5\u4e2a file_get_contents() \u51fd\u6570\uff08\u6ed1\u7a3d\uff09                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zictos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @webshe11 #13 \u90a3\u770b\u6765\u8fd8\u662f\u8ddf\u89e3\u91ca\u5668\u6709\u5173\uff0c\u517c\u5bb9\u578b\u4e0d\u662f\u5f88\u597d\u3002\u4e0d\u8fc7\u81ea\u5df1\u4f7f\u7528\u5012\u662f\u6ca1\u95ee\u9898\u3002
    \u56e0\u4e3a\u6211\u7684\u9700\u6c42\u4e5f\u91cd\u70b9\u662f\u7528\u5728\u5c0f\u811a\u672c\uff0c\u6bd4\u5982\u6709\u65f6\u5019\u6253\u7b97\u5199\u4e00\u4e2a\u672c\u6765\u5c31\u53ea\u6709\u5341\u51e0\u884c\u7684\u811a\u672c\uff0c\u6216\u8005\u5728\u5b89\u5353\u624b\u673a\u4e0a\u7528 termux \u8fd0\u884c python\uff0c\u8fd9\u6837\u6bd4\u8f83\u65b9\u4fbf\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : kikikiabc <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 > \u8981\u4e0d\u518d\u5c01\u88c5\u6210\u4e00\u4e2a\u51fd\u6570\uff0c\u4f20\u5165\u6587\u4ef6\u540d\u8fd4\u56de\u503c\uff0c\u5185\u90e8\u505a\u597d\u5904\u7406?<\/p>\n
    \u6709\uff0c\u81ea\u5e26\u7684 pathlib \u5df2\u7ecf\u5c01\u88c5\u597d\u4e86\u7684\uff0c\u786e\u5b9e\u662f\u201c\u4f20\u5165\u6587\u4ef6\u540d\u8fd4\u56de\u503c\u201d\uff0c \u5f88\u597d\u7528                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : hxy100 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @webshe11 PHP \u4e71\u5165\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : xiaolinjia <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5728\u6d41\u7545\u7684 python \u4e00\u4e66\u4e2d\u6709\u63d0\u5230\uff1a
    CPython \u4e2d\u7684\u5783\u573e\u56de\u6536\u4e3b\u8981\u4f9d\u9760\u5f15\u7528\u8ba1\u6570\uff0c\u8fd9\u5bb9\u6613\u5b9e\u73b0\uff0c\u4f46\u662f\u9047\u5230\u5f15\u7528\u5faa\u73af\u5bb9\u6613\u6cc4\u9732
    \u5185\u5b58\uff0c\u56e0\u6b64 CPython 2.0 \uff08 2000 \u5e74 10 \u6708\u53d1\u5e03\uff09\u5b9e\u73b0\u4e86\u5206\u4ee3\u5783\u573e\u56de\u6536\u7a0b\u5e8f\uff0c\u5b83\u80fd\u628a\u5f15\u7528
    \u5faa\u73af\u4e2d\u4e0d\u53ef\u83b7\u53d6\u7684\u5bf9\u8c61\u9500\u6bc1\u3002
    \u4f46\u662f\u5f15\u7528\u8ba1\u6570\u4ecd\u7136\u4f5c\u4e3a\u4e00\u79cd\u57fa\u51c6\u5b58\u5728\uff0c\u4e00\u65e6\u5f15\u7528\u6570\u91cf\u5f52\u96f6\uff0c\u5c31\u7acb\u5373\u9500\u6bc1\u5bf9\u8c61\u3002\u8fd9\u610f\u5473
    \u7740\uff0c\u5728 CPython \u4e2d\uff0c\u8fd9\u6837\u5199\u662f\u5b89\u5168\u7684\uff08\u81f3\u5c11\u76ee\u524d\u5982\u6b64\uff09\uff1a
    open(‘test.txt’, ‘wt’, encoding=’utf-8′).write(‘1, 2, 3’)
    \u8fd9\u884c\u4ee3\u7801\u662f\u5b89\u5168\u7684\uff0c\u56e0\u4e3a\u6587\u4ef6\u5bf9\u8c61\u7684\u5f15\u7528\u6570\u91cf\u4f1a\u5728 write \u65b9\u6cd5\u8fd4\u56de\u540e\u5f52\u96f6\uff0cPython
    \u5728\u9500\u6bc1\u5185\u5b58\u4e2d\u8868\u793a\u6587\u4ef6\u7684\u5bf9\u8c61\u4e4b\u524d\uff0c\u4f1a\u7acb\u5373\u5173\u95ed\u6587\u4ef6\u3002\u7136\u800c\uff0c\u8fd9\u884c\u4ee3\u7801\u5728 Jython \u6216
    IronPython \u4e2d\u5374\u4e0d\u5b89\u5168\uff0c\u56e0\u4e3a\u5b83\u4eec\u4f7f\u7528\u7684\u662f\u5bbf\u4e3b\u8fd0\u884c\u65f6\uff08 Java VM \u548c .NET CLR \uff09\u4e2d\u7684
    \u5783\u573e\u56de\u6536\u7a0b\u5e8f\uff0c\u90a3\u4e9b\u56de\u6536\u7a0b\u5e8f\u66f4\u590d\u6742\uff0c\u4f46\u662f\u4e0d\u4f9d\u9760\u5f15\u7528\u8ba1\u6570\uff0c\u800c\u4e14\u9500\u6bc1\u5bf9\u8c61\u548c\u5173\u95ed\u6587
    \u4ef6\u7684\u65f6\u95f4\u53ef\u80fd\u66f4\u957f\u3002\u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\uff0c\u5305\u62ec CPython\uff0c\u6700\u597d\u663e\u5f0f\u5173\u95ed\u6587\u4ef6\uff1b\u800c\u5173\u95ed\u6587\u4ef6
    \u7684\u6700\u53ef\u9760\u65b9\u5f0f\u662f\u4f7f\u7528 with \u8bed\u53e5\uff0c\u5b83\u80fd\u4fdd\u8bc1\u6587\u4ef6\u4e00\u5b9a\u4f1a\u88ab\u5173\u95ed\uff0c\u5373\u4f7f\u6253\u5f00\u6587\u4ef6\u65f6\u629b\u51fa
    \u4e86\u5f02\u5e38\u4e5f\u65e0\u59a8\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : AndyAO <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5355\u7eaf\u662f\u4e3a\u4e86\u65b9\u4fbf\u7684\u8bdd\u53ef\u4ee5\u7528 With \u6765\u5199\u4e2a Snippet                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : johnsona <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @v2sir \u597d\u5bb6\u4f19 \u4f60\u8fd9\u5783\u573e\u56de\u6536\u673a\u5236\u90fd\u5b66\u4ee5\u81f4\u7528\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : imn1 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u201c\u8001\u5b50\u5199\u7684\u7a0b\u5e8f\u7edd\u5bf9\u6ca1\u6709 bug\uff0c\u4e5f\u7edd\u5bf9\u4e0d\u4f1a\u8017\u65f6\uff0c\u9501\u6587\u4ef6\u53c8\u5982\u4f55\uff0c\u7231\u548b\u548b\u5730\u201d                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e3b\u5df2\u7ecf\u6709\u7b54\u6848\u4e86\uff0c\u4ed6\u627f\u8ba4\u4e0d\u7b26\u5408\u8bed\u8a00\u6807\u51c6\uff0c\u4f46\u662f\u5c31\u662f\u7231\u8fd9\u4e48\u5e72\u3002\u4f60\u4eec\u56de\u5e16\u6709\u5565\u610f\u4e49\uff1f\u6563\u4e86\u6563\u4e86\u3002\u3002\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zictos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @Contextualist #11 pathlib \u80fd\u76f4\u63a5\u904d\u5386\u6bcf\u4e00\u884c\uff08\u9488\u5bf9\u5927\u6587\u4ef6\uff09\u5417\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zictos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @ipwx #21 \u5176\u5b9e\u5982\u679c\u6ca1\u6709\u5176\u4ed6\u5751\u7684\u8bdd\u8fd9\u6837\u7528\u4e5f\u6ca1\u95ee\u9898\uff0c\u4f46\u76ee\u524d\u770b\u6765\u662f\u6709\u5751\u7684\u3002\u53ea\u662f\u6211\u4e0d\u53d1\u8fd9\u4e2a\u5e16\u5b50\u7684\u8bdd\u6211\u4ee5\u4e3a\u4e0d\u4f1a\u6709\u5751\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @zictos \u60f3\u8981\u904d\u5386\u6bcf\u4e00\u884c\u53c8\u80fd\u786e\u4fdd\u5173\u95ed\u6587\u4ef6\uff0c\u4f60\u81ea\u5df1\u5199\u4e2a\u51fd\u6570\u5457\uff1a<\/p>\n
    def iter_lines(path, encoding=None):
    ….f = open(path, ‘r’, encoding=encoding)
    ….try:
    ……..for line in f:
    …………yield line
    ….finally:
    ……..f.close()                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zictos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @ipwx #24 \u53ea\u662f\u8981\u4fdd\u8bc1\u968f\u65f6\u80fd\u7528\uff0c\u4e0d\u4f1a\u6bcf\u6b21\u90fd\u53bb\u5199\u51fd\u6570\u3002\u5982\u679c\u653e\u5230 python \u7b2c\u4e09\u65b9\u6a21\u5757\u7684\u6587\u4ef6\u5939\u7684\u8bdd\u6bcf\u6b21\u4f7f\u7528\u65f6\u5f15\u5165\u4e5f\u53ef\u4ee5\uff0c\u53ea\u662f\u4e0d\u80fd\u4fdd\u8bc1\u53bb\u4efb\u4f55\u6709 python \u73af\u5883\u7684\u7535\u8111\u90fd\u80fd\u7528\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @zictos \u8981\u6c42\u771f\u591a\u3002with \u4e0d\u8fc7\u591a\u4e00\u884c\u3002\u95ee\u5c31\u662f\u6807\u51c6\u5e93\u6ca1\u6709                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : abersheeran <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @zictos \u4e0a\u8bf4\u7684 pathlib \u5c31\u662f\u6807\u51c6\u5e93\u3002\u4efb\u4f55 Python3 \u7684\u73af\u5883\u4f60\u90fd\u53ef\u4ee5\u7528\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zictos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @ipwx #26 \u55ef\uff0cwith \u4e5f\u6ca1\u591a\u9ebb\u70e6\uff0c\u7528\u5176\u4ed6\u9014\u5f84\u53bb\u5f04\u6700\u540e\u53ef\u80fd\u6bd4 with \u8fd8\u9ebb\u70e6\u3002
    \u53ea\u662f\u770b\u5230\u6709\u4eba\u63a8\u8350 pathlib\uff0c\u800c\u6211\u9898\u4e2d\u4e5f\u8bf4\u4e86\u904d\u5386\u7684\u4f8b\u5b50\uff0c\u6240\u4ee5\u624d\u968f\u53e3\u95ee\u4e00\u4e0b pathlib \u662f\u5426\u80fd\u904d\u5386\u800c\u5df2\uff0c\u4e5f\u4e0d\u662f\u4e00\u5b9a\u8981\u7528 pathlib \u904d\u5386                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zictos <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @abersheeran #27 \u55ef\uff0c\u4f46 pathlib \u8fd8\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u4e0d\u80fd\u76f4\u63a5\u904d\u5386\u3002\u8bfb\u53d6\u6216\u5199\u5165\u5012\u662f\u6ca1\u95ee\u9898\uff0c\u4ee5\u540e\u8bfb\u53d6\u6216\u5199\u5165\u53ef\u4ee5\u9009\u62e9\u7528 pathlib                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : crclz <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5982\u679c\u4f60\u5acc with \u591a\u4e86\u4e00\u5c42\u7f29\u8fdb\u7684\u8bdd\uff0cC#\u7684 using \u5f88\u6ee1\u8db3\u4f60\u7684\u9700\u6c42\u3002using var reader = xxx;                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : laike9m <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd9\u4e2a\u95ee\u9898\u8fd8\u6709\u4e89\u8bae\u4e5f\u662f\u6211\u6ca1\u60f3\u5230\u7684\u3002\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : chenqh <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @crclz python \u7684 with,\u4e0d\u5c31\u76f8\u5f53\u4e8e C#\u7684 using(){}\u5417?                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : mrchi <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @ljpCN \u591a\u4e2a\u6587\u4ef6\u4e0d\u5fc5\u591a\u5c42\u7f29\u8fdb\uff0c\u53c2\u8003\u6587\u6863\uff1a https:\/\/docs.python.org\/3\/reference\/compound_stmts.html#the-with-statement<\/p>\n
    with A() as a, B() as b:
     SUITE                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : Contextualist <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @zictos #22 pathlib \u4e0d\u4f1a\u63d0\u4f9b\u50cf @ipwx #24 \u63cf\u8ff0\u7684\u6587\u4ef6\u8fed\u4ee3\u5668\u3002\u8003\u8651\u4e00\u4e0b\u4e0b\u9762\u7684\u4ee3\u7801\uff1a
    try:
    for l in iter_lines(‘test.txt’):
    print(l[100])
    except:
    pass<\/p>\n
    \u5982\u679c for \u5faa\u73af\u91cc\u7684\u8bed\u53e5\u629b\u51fa\u4e86\u5f02\u5e38\uff0c\u7a0b\u5e8f\u4f1a\u7ee7\u7eed\u6267\u884c\uff0c\u4f46\u662f\u56e0\u4e3a iter_lines \u751f\u6210\u5668\u6ca1\u6709\u6267\u884c\u5b8c\uff0c\u91cc\u9762\u7684\u6587\u4ef6\u4e0d\u4f1a\u88ab\u5173\u95ed\u3002\u95ee\u9898\u7684\u6839\u672c\u539f\u56e0\u662f\uff1a\u6ca1\u6709\u529e\u6cd5\u80fd \u81ea\u52a8 \u5c06\u5916\u5c42\u7684\u5f02\u5e38\u4f20\u9012\u8fdb\u5165\u5185\u5c42\u3002\u8fd9\u5c31\u662f\u4e0a\u4e0b\u6587\u7ba1\u7406\u5668 \/ with \u8bed\u53e5\u8bbe\u8ba1\u8981\u89e3\u51b3\u7684\u95ee\u9898\u4e4b\u4e00\u3002\u7528 with open\uff0c\u5982\u679c for \u5faa\u73af\u91cc\u7684\u8bed\u53e5\u629b\u51fa\u4e86\u5f02\u5e38\u5bfc\u81f4\u8df3\u51fa\u4e86 with \u7684\u8303\u56f4\uff0c\u6587\u4ef6\u4f1a\u88ab\u81ea\u52a8\u5173\u95ed\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @Contextualist \u4f60\u7684\u8ba4\u77e5\u662f\u9519\u8bef\u7684\u3002<\/p>\n
    \"Python(Python 3.7.3)<\/p>\n
    \u770b\u5230\u8f93\u51fa\u7684\u90a3\u884c finally \u4e86\u4e48\uff1f
    —-<\/p>\n
    \u4e8b\u5b9e\u4e0a\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684 with contextmanager \u5c31\u5f97\u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\u5199\uff0c\u8b6c\u5982\uff1a<\/p>\n
    @contextlib.contextmanager
    def my_context():
    ….try:
    ……..yield
    ….finally:
    ……..do some cleanup<\/p>\n
    with my_context():
    ….raise Error(…)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : Contextualist <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @ipwx \u554a\uff0c\u611f\u8c22\u63d0\u51fa\uff01\u4ed4\u7ec6\u7814\u7a76\u4e86\u4e00\u4e0b\uff0c\u8fd9\u4e2a\u60c5\u51b5\u5176\u5b9e\u4e5f\u662f\u51fa\u4e8e\u5bf9 gc \u673a\u5236\u7684\u5229\u7528\u3002\u5982\u679c\u4f60\u8bd5\u7740\u628a\u8fd9\u4e2a\u751f\u6210\u5668\u5b9e\u4f8b\u8d4b\u7ed9\u4e00\u4e2a\u53d8\u91cf\uff08\u907f\u514d gc \uff09\uff0c\u7136\u540e\u518d\u8c03\u7528\u5b83\uff0c\u50cf\u8fd9\u6837\uff1a
    it = iter_lines([1,2,3])
    for l in it:
    \u2003\u2003if l == 2:
    \u2003\u2003 \u2003\u2003raise ValueError(‘xxx’)<\/p>\n
    finally \u5c31\u4e0d\u4f1a\u88ab\u89e6\u53d1\u3002\u4f60\u7684\u4f8b\u5b50\u4e2d\uff0cfinally \u6267\u884c\u7684\u539f\u56e0\u662f\u751f\u6210\u5668\u5b9e\u4f8b\u5728 for \u5faa\u73af\u540e\u88ab gc \u4e86\uff0cPython \u7684\u5b9e\u73b0\u8981\u6c42\u6ca1\u6267\u884c\u5b8c\u7684\u751f\u6210\u5668\u88ab gc \u65f6\u5fc5\u987b\u6267\u884c finally\uff0c\u8be6\u89c1 https:\/\/docs.python.org\/3\/reference\/expressions.html#yieldexpr<\/p>\n
    \u81f3\u4e8e contextlib.contextmanager\uff0c\u90a3\u662f\u56e0\u4e3a Python \u7684\u5e93\u5c06 with \u6355\u83b7\u7684\u5f02\u5e38\u624b\u52a8\u4f20\u5165\u4e86\u751f\u6210\u5668\uff0c\u8be6\u89c1 https:\/\/github.com\/python\/cpython\/blob\/7990072999b7e9b4ef6b1f6bb376d441a5a41d74\/Lib\/contextlib.py#L135                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @Contextualist Oh \u591a\u8c22\u63d0\u793a\uff0c\u6211\u8fd8\u6ca1\u6ce8\u610f\u8fc7 .throw()\u3002\u4e3b\u8981\u662f\u6211\u81ea\u5df1\u5199\u81ea\u5df1\u7684\u5e93\u4e00\u822c\u7528 .close() \u6765\u5904\u7406 for iter ….\uff0c\u6240\u4ee5\u4e5f\u4e0d\u4f1a\u53d7\u5f15\u7528\u8ba1\u6570\u7684 gc \u9650\u5236\u3002<\/p>\n
    \"Python<\/p>\n
    \u770b\u4e86\u770b .close() \u516b\u6210\u7b49\u4e8e .throw(StopIteration)                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : geelaw <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @Contextualist #36
    @ipwx #37<\/p>\n
    \u6211\u60f3\u8c61\u4e2d\u7684<\/p>\n
    for A in B:
    ..body<\/p>\n
    \u7684\u5c55\u5f00\u662f<\/p>\n
    TMP = B.__iter__() # \u7f16\u8bd1\u5668\u751f\u6210\u7684\u8fed\u4ee3\u5668\u7684 __exit__ \u4f1a\u6267\u884c\u5269\u4f59\u7684 finally
    with TMP:
    ..while True:
    ….A = TMP.__next__()
    ….body<\/p>\n
    \u5373\u548c C# \u91cc\u7684 foreach \u5c55\u5f00\u5305\u542b finally IDisposable.Dispose \u4e00\u6837\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : Contextualist <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @geelaw \u867d\u7136\u73b0\u5728\u7684 Python \u91cc\u5e76\u6ca1\u6709\u8fd9\u6837\u7684\u8bed\u6cd5\uff0c\u4f46\u662f\u5176\u5b9e with \u4e0a\u4e0b\u6587\u91cc\u7528 for \u5faa\u73af\uff08\u5373\u663e\u5f0f\u6307\u5b9a\u4efb\u4f55\u60c5\u51b5\u4e0b\u8df3\u51fa\u5faa\u73af\u90fd\u9700\u8981 clean up \uff09\u8fd8\u7684\u786e\u662f\u4e2a\u5e38\u89c1\u7684\u6a21\u5f0f\uff08\u4f8b\u5982 Trio \u91cc\u7684 channel\uff1a https:\/\/trio.readthedocs.io\/en\/stable\/reference-core.html#clean-shutdown-with-channels \uff09\u3002\u5982\u679c\u771f\u7684\u662f\u5e38\u89c1\u6a21\u5f0f\u5e76\u4e14\u4e0d\u8003\u8651\u5c06\u8bed\u6cd5\u53d8\u5f97\u5197\u6742\uff0c\u4e0d\u59a8\u63d0\u8bae Python \u52a0\u4e2a for … in with …: \u7684\u8bed\u6cd5                                                             <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    Python \u8bfb\u5199\u6587\u4ef6\u65f6\u4e0d\u7528 wi…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/418825"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=418825"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/418825\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=418825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=418825"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=418825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}