{"id":2257,"date":"2018-08-12T15:27:08","date_gmt":"2020-02-12T13:58:45","guid":{"rendered":"http:\/\/vip.fxxkpython.com\/?p=2257"},"modified":"2020-02-12T21:58:47","modified_gmt":"2020-02-12T13:58:47","slug":"a2e9e33438","status":"publish","type":"post","link":"https:\/\/vip.fxxkpython.com\/?p=2257","title":{"rendered":"Python\u662f\u600e\u4e48\u8bfb\u5199\u5c0f\u9ec4\u6587\u7684\uff1f"},"content":{"rendered":"
\n

\u6211\u4eec\u5230\u65f6\u5019\u80af\u5b9a\u662f\u9700\u8981\u7528\u5230\u5bf9\u6587\u4ef6\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u7684\uff0c\u4e5f\u5c31\u662fIO\uff0c\u4f46\u662f\u6211\u4eec\u4e0d\u80fd\u76f4\u63a5\u53bb\u64cd\u4f5c\u6587\u4ef6\uff0c\u6211\u4eec\u9700\u8981\u53bb\u544a\u8bc9\u64cd\u4f5c\u7cfb\u7edf\uff0c\u6211\u4eec\u60f3\u64cd\u4f5c\u4ec0\u4e48\u6587\u4ef6\uff0c\u7136\u540e\u64cd\u4f5c\u7cfb\u7edf\u5e2e\u6211\u4eec\u64cd\u4f5c\u3002<\/p>\n


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\"python\" \u6211\u60f3\u770b\u5c0f\u9ec4\u6587\uff01\u4e3a\u4ec0\u4e48\u64cd\u4f5c\u4e0d\u4e86\u6587\u4ef6\uff1f<\/span><\/p>\n


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\u4f60\u9700\u8981\u544a\u8bc9\u64cd\u4f5c\u7cfb\u7edf\uff0c\u8ba9\u5b83\u5e2e\u4f60\u64cd\u4f5c<\/span>\"python\"<\/p>\n


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\"python\"\u90a3\u600e\u4e48\u64cd\u4f5c\uff1f<\/span><\/p>\n


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\u6709\u8bf7\u5c0f\u5e05b\u544a\u8bc9\u4f60\uff01<\/span>\"python\"<\/p>\n


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<\/p>\n

1<\/strong><\/span> \u8bfb\u53d6\u6587\u4ef6<\/strong><\/p>\n

\u6211\u4eec\u5148\u521b\u5efa\u4e2a\u53eb\u505a xiaohuangwen.txt \u7684\u6587\u4ef6\u5427\uff1a<\/p>\n


<\/p>\n

\"python\"<\/p>\n


<\/strong><\/p>\n

python\u6709\u4e2a\u5185\u7f6e\u7684\u51fd\u6570\u53eb\u505a open() , \u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5b83\u76f4\u63a5\u6253\u5f00\u6587\u4ef6\uff0c\u6253\u5f00\u5b8c\u6587\u4ef6\u5c31\u53ef\u4ee5\u8bfb\u53d6\u4e86\uff0c\u4f46\u662f\u6709\u53ef\u80fd\u4f1a\u62a5\u9519\uff0c\u5c31\u662f\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u53ef\u4ee5\u7528\u5230\u4e0a\u6b21\u8bf4\u7684 try…finally \u6765\u5904\u7406\u5f02\u5e38\uff1a<\/p>\n


<\/p>\n

try<\/span>:
    f = open<\/span>(\"G:\/xiaohuangwen.txt\"<\/span>,<\/span>\"r\"<\/span>,<\/span>encoding<\/span>=\"UTF-8\"<\/span>)
    print<\/span>(f.read())
finally<\/span>:
    if <\/span>f:
        f.close()<\/pre>\n

<\/p>\n
\u6211\u4eec\u901a\u8fc7 open \u6253\u5f00\u4e86 xiaohuangwen.txt \u8fd9\u4e2a\u6587\u4ef6\u3002 r \u5c31\u662f\u8bfb\u7684\u610f\u601d\uff0c encoding\u5c31\u662f\u5b9a\u4e49\u597d\u6587\u4ef6\u7f16\u7801\u3002<\/p>\n

<\/p>\n
\u63a5\u7740\u6211\u4eec\u5c31\u6253\u5370\u51fa\u6211\u4eec read \u51fa\u6765\u7684\u6587\u4ef6\u5566\uff1a<\/p>\n

<\/p>\n
\"python\"<\/p>\n

<\/p>\n
\u6700\u540e\u4e00\u5b9a\u8981\u8bb0\u5f97\u5c06\u6587\u4ef6 close \u6389\uff0c\u8fd9\u6837\u624d\u4e0d\u4f1a\u9020\u6210\u7cfb\u7edf\u6d6a\u8d39\u8d44\u6e90\u3002<\/p>\n

<\/p>\n
\u6709\u65f6\u5019\u4f60\u5728\u8bfb\u53d6\u6587\u4ef6\u7684\u65f6\u5019\uff0c\u662f\u4e0d\u662f\u89c9\u5f97\u6bcf\u6b21\u90fd\u8981 try…finally \u5f88\u9ebb\u70e6\uff1f \u8d34\u5fc3\u7684 Python \u5e2e\u6211\u4eec\u7b80\u5316\u4e86\u6d41\u7a0b\uff0c\u6211\u4eec\u53ea\u8981\u76f4\u63a5\u8fd9\u6837\u5199\u5c31\u53ef\u4ee5\u4e86\uff1a<\/p>\n

<\/p>\n
with <\/span>open<\/span>(\"G:\/spider\/xiaohuangwen.txt\"<\/span>,<\/span>\"r\"<\/span>,<\/span>encoding<\/span>=\"UTF-8\"<\/span>) as <\/span>f:
    print<\/span>(f.read())<\/pre>\n
 <\/p>\n
\u662f\u4e0d\u662f\u7b80\u5316\u4e86\u5f88\u591a\uff1f\uff1f<\/p>\n

<\/p>\n

<\/p>\n
2 <\/strong><\/span>\u5199\u5165\u6587\u4ef6<\/strong><\/p>\n
\u5199\u5165\u6587\u4ef6\u5185\u5bb9\u4e5f\u662f\u4e00\u4e2a\u9053\u7406\uff0c\u6211\u4eec\u9996\u5148\u8981\u6253\u5f00\u6587\u4ef6\uff0c\u7136\u540e\u5f80\u91cc\u5199\u5185\u5bb9\uff0c\u5982\u679c\u6211\u4eec\u4f20\u5165\u7684\u53c2\u6570\u662f \u2018w\u2019 \u7684\u8bdd\uff0c\u5b83\u4f1a\u8986\u76d6\u539f\u6765\u7684\u6587\u4ef6\uff0c\u800c\u6211\u4eec\u4f20\u5165 \u2018a\u2019 \u5219\u53ef\u4ee5\u5728\u6587\u4ef6\u672b\u5c3e\u8ffd\u52a0\u5185\u5bb9\uff1a<\/p>\n

<\/p>\n
with <\/span>open<\/span>(\"G:\/spider\/xiaohuangwen.txt\"<\/span>,<\/span>\"a\"<\/span>,<\/span>encoding<\/span>=\"UTF-8\"<\/span>) as <\/span>f:
    print<\/span>(f.write(\"<\/span>n<\/span>\u6211\u60f3\u770b\u82cd\u8001\u5e08\u554a\uff01\"<\/span>))<\/pre>\n

<\/p>\n
ok\uff0c\u8fd0\u884c\u4e4b\u540e\u4f60\u4f1a\u53d1\u73b0\uff0c\u4f60\u5df2\u7ecf\u628a\u5185\u5bb9\u5199\u8fdb\u53bb\u4e86\uff0c\u662f\u4e0d\u662f\u5f88\u7b80\u5355\uff1f<\/p>\n

<\/p>\n
\"python\"<\/p>\n

<\/p>\n

<\/p>\n
\"python\" \u6211\u5728\u540e\u53f0\u56de\u590d av \uff0c \u770b\u770b\u6709\u4ec0\u4e48\u4e1c\u897f\u54c8\u54c8\uff01<\/span><\/p>\n

<\/p>\n

<\/span><\/p>\n
\u5173\u6ce8\u6211\uff0c\u8ba9\u4f60\u50cf\u770b\u5c0f\u9ec4\u6587\u4e00\u6837\u8f7b\u677e\u5b66\u5230 Python \u7684\u6240\u6709\uff01<\/span><\/p>\n

<\/p>\n
\"python\"<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n
ps\uff1a\u8fd8\u6ca1\u83b7\u53d6\u6211\u7cbe\u5fc3\u51c6\u5907\u7684 Python \u7535\u5b50\u4e66\u548c\u601d\u7ef4\u5bfc\u56fe\u7b49\u5e72\u8d27\u7684\u53ef\u4ee5\u5728\u6211\u7684\u516c\u4f17\u53f7\u300c\u5b66\u4e60Python\u7684\u6b63\u786e\u59ff\u52bf\u300d\u4e2d\u53d1\u9001 python \u514d\u8d39\u83b7\u53d6\u54e6\uff01 <\/p>\n
   <\/p>\n
\u518dps:\u8bf4\u771f\u7684\uff0c\u5982\u679c\u4f60\u80fd\u70b9\u4e2a\u8d5e\u8f6c\u53d1\u652f\u6301\u6211\u4e00\u4e0b\u6211\u4f1a\u66f4\u6709\u52a8\u529b\u5199\u3002<\/strong><\/p>\n

<\/strong><\/p>\n

<\/p>\n
                            \u987a\u624b\"python\"\uff0c\u70b9\u4e2a\u8d5e\u5427<\/strong><\/span><\/p>\n

<\/p>\n
\n
\u539f\u6587\u59cb\u53d1\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7\uff08\u5b66\u4e60python\u7684\u6b63\u786e\u59ff\u52bf\uff09\uff1apython<\/a><\/p>\n<\/blockquote>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u6211\u4eec\u5230\u65f6\u5019\u80af\u5b9a\u662f\u9700\u8981\u7528\u5230\u5bf9\u6587\u4ef6\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u7684\uff0c\u4e5f\u5c31\u662fIO\uff0c\u4f46\u662f\u6211\u4eec\u4e0d\u80fd\u76f4\u63a5\u53bb\u64cd\u4f5c\u6587\u4ef6\uff0c\u6211\u4eec\u9700\u8981\u53bb\u544a\u8bc9\u64cd\u4f5c\u7cfb\u7edf\uff0c\u6211\u4eec\u60f3\u64cd\u4f5c\u4ec0\u4e48\u6587\u4ef6\uff0c\u7136\u540e\u64cd\u4f5c\u7cfb\u7edf\u5e2e\u6211\u4eec\u64cd\u4f5c\u3002  \u6211\u60f3\u770b\u5c0f\u9ec4\u6587\uff01\u4e3a\u4ec0\u4e48\u64cd\u4f5c\u4e0d\u4e86\u6587\u4ef6\uff1f \u4f60\u9700\u8981\u544a\u8bc9\u64cd\u4f5c\u7cfb\u7edf\uff0c\u8ba9\u5b83\u5e2e\u4f60\u64cd\u4f5c \u90a3\u600e\u4e48\u64cd\u4f5c\uff1f…<\/p>\n","protected":false},"author":1,"featured_media":2258,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[303],"tags":[302,19,300,301],"_links":{"self":[{"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/posts\/2257"}],"collection":[{"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2257"}],"version-history":[{"count":1,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/posts\/2257\/revisions"}],"predecessor-version":[{"id":2269,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/posts\/2257\/revisions\/2269"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=\/wp\/v2\/media\/2258"}],"wp:attachment":[{"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vip.fxxkpython.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}