{"id":276,"date":"2017-02-07T11:45:15","date_gmt":"2017-02-07T03:45:15","guid":{"rendered":"http:\/\/luchanglong.com.cn\/?p=276"},"modified":"2017-02-07T11:45:15","modified_gmt":"2017-02-07T03:45:15","slug":"python-%e5%b8%b8%e7%94%a8%e5%86%85%e5%bb%ba%e6%a8%a1%e5%9d%97-datetime","status":"publish","type":"post","link":"https:\/\/blog.la998.com\/?p=276","title":{"rendered":"python \u5e38\u7528\u5185\u5efa\u6a21\u5757-datetime"},"content":{"rendered":"<ul>\n<li style=\"text-align: left;\">datetime<\/li>\n<\/ul>\n<h3 id=\"-\">\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4<\/h3>\n<pre class=\"lang:python decode:true\">&gt;&gt;&gt; from datetime import datetime\r\n&gt;&gt;&gt; now = datetime.now() # \u83b7\u53d6\u5f53\u524ddatetime\r\n&gt;&gt;&gt; print(now)\r\n2015-05-18 16:28:07.198690<\/pre>\n<h3 id=\"-\">\u83b7\u53d6\u6307\u5b9a\u65e5\u671f\u548c\u65f6\u95f4<\/h3>\n<pre class=\"lang:python decode:true \">&gt;&gt;&gt; from datetime import datetime\r\n&gt;&gt;&gt; dt = datetime(2015, 4, 19, 12, 20) # \u7528\u6307\u5b9a\u65e5\u671f\u65f6\u95f4\u521b\u5efadatetime\r\n&gt;&gt;&gt; print(dt)\r\n2015-04-19 12:20:00<\/pre>\n<h3 id=\"datetime-timestamp\">datetime\u8f6c\u6362\u4e3atimestamp<\/h3>\n<pre><code class=\"python\"><span class=\"prompt\">&gt;&gt;&gt; <\/span><span class=\"keyword\">from<\/span> datetime <span class=\"keyword\">import<\/span> datetime\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>dt = datetime(<span class=\"number\">2015<\/span>, <span class=\"number\">4<\/span>, <span class=\"number\">19<\/span>, <span class=\"number\">12<\/span>, <span class=\"number\">20<\/span>) <span class=\"comment\"># \u7528\u6307\u5b9a\u65e5\u671f\u65f6\u95f4\u521b\u5efadatetime<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>dt.timestamp() <span class=\"comment\"># \u628adatetime\u8f6c\u6362\u4e3atimestamp<\/span>\r\n<span class=\"number\">1429417200.0<\/span><\/code><\/pre>\n<h3 id=\"timestamp-datetime\">timestamp\u8f6c\u6362\u4e3adatetime<\/h3>\n<pre class=\"lang:default decode:true \">&gt;&gt;&gt; from datetime import datetime\r\n&gt;&gt;&gt; t = 1429417200.0\r\n&gt;&gt;&gt; print(datetime.fromtimestamp(t))\r\n2015-04-19 12:20:00<\/pre>\n<p>imestamp\u4e5f\u53ef\u4ee5\u76f4\u63a5\u88ab\u8f6c\u6362\u5230UTC\u6807\u51c6\u65f6\u533a\u7684\u65f6\u95f4\uff1a<\/p>\n<pre class=\"\"><code class=\"python\"><span class=\"prompt\">&gt;&gt;&gt; <\/span><span class=\"keyword\">from<\/span> datetime <span class=\"keyword\">import<\/span> datetime\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>t = <span class=\"number\">1429417200.0<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>print(datetime.fromtimestamp(t)) <span class=\"comment\"># \u672c\u5730\u65f6\u95f4<\/span>\r\n<span class=\"number\">2015<\/span>-<span class=\"number\">04<\/span>-<span class=\"number\">19<\/span> <span class=\"number\">12<\/span>:<span class=\"number\">20<\/span>:<span class=\"number\">00<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>print(datetime.utcfromtimestamp(t)) <span class=\"comment\"># UTC\u65f6\u95f4<\/span>\r\n<span class=\"number\">2015<\/span>-<span class=\"number\">04<\/span>-<span class=\"number\">19<\/span> <span class=\"number\">04<\/span>:<span class=\"number\">20<\/span>:<span class=\"number\">00<\/span><\/code>\r\n<\/pre>\n<h3 id=\"str-datetime\">str\u8f6c\u6362\u4e3adatetime<\/h3>\n<pre><code class=\"python\"><span class=\"prompt\">&gt;&gt;&gt; <\/span><span class=\"keyword\">from<\/span> datetime <span class=\"keyword\">import<\/span> datetime\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>cday = datetime.strptime(<span class=\"string\">'2015-6-1 18:19:59'<\/span>, <span class=\"string\">'%Y-%m-%d %H:%M:%S'<\/span>)\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>print(cday)\r\n<span class=\"number\">2015<\/span>-<span class=\"number\">06<\/span>-<span class=\"number\">01<\/span> <span class=\"number\">18<\/span>:<span class=\"number\">19<\/span>:<span class=\"number\">59<\/span><\/code><\/pre>\n<h3 id=\"datetime-str\">datetime\u8f6c\u6362\u4e3astr<\/h3>\n<pre><code class=\"python\"><span class=\"prompt\">&gt;&gt;&gt; <\/span><span class=\"keyword\">from<\/span> datetime <span class=\"keyword\">import<\/span> datetime\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>now = datetime.now()\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>print(now.strftime(<span class=\"string\">'%a, %b %d %H:%M'<\/span>))\r\nMon, May <span class=\"number\">05<\/span> <span class=\"number\">16<\/span>:<span class=\"number\">28<\/span><\/code><\/pre>\n<h3 id=\"datetime-\">datetime\u52a0\u51cf<\/h3>\n<pre><code class=\"python\"><span class=\"prompt\">&gt;&gt;&gt; <\/span><span class=\"keyword\">from<\/span> datetime <span class=\"keyword\">import<\/span> datetime, timedelta\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>now = datetime.now()\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>now\r\ndatetime.datetime(<span class=\"number\">2015<\/span>, <span class=\"number\">5<\/span>, <span class=\"number\">18<\/span>, <span class=\"number\">16<\/span>, <span class=\"number\">57<\/span>, <span class=\"number\">3<\/span>, <span class=\"number\">540997<\/span>)\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>now + timedelta(hours=<span class=\"number\">10<\/span>)\r\ndatetime.datetime(<span class=\"number\">2015<\/span>, <span class=\"number\">5<\/span>, <span class=\"number\">19<\/span>, <span class=\"number\">2<\/span>, <span class=\"number\">57<\/span>, <span class=\"number\">3<\/span>, <span class=\"number\">540997<\/span>)\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>now - timedelta(days=<span class=\"number\">1<\/span>)\r\ndatetime.datetime(<span class=\"number\">2015<\/span>, <span class=\"number\">5<\/span>, <span class=\"number\">17<\/span>, <span class=\"number\">16<\/span>, <span class=\"number\">57<\/span>, <span class=\"number\">3<\/span>, <span class=\"number\">540997<\/span>)\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>now + timedelta(days=<span class=\"number\">2<\/span>, hours=<span class=\"number\">12<\/span>)\r\ndatetime.datetime(<span class=\"number\">2015<\/span>, <span class=\"number\">5<\/span>, <span class=\"number\">21<\/span>, <span class=\"number\">4<\/span>, <span class=\"number\">57<\/span>, <span class=\"number\">3<\/span>, <span class=\"number\">540997<\/span>)<\/code><\/pre>\n<p>\u672c\u5730\u65f6\u95f4\u8f6c\u6362\u4e3aUTC\u65f6\u95f4<\/p>\n<p>\u672c\u5730\u65f6\u95f4\u662f\u6307\u7cfb\u7edf\u8bbe\u5b9a\u65f6\u533a\u7684\u65f6\u95f4\uff0c\u4f8b\u5982\u5317\u4eac\u65f6\u95f4\u662fUTC+8:00\u65f6\u533a\u7684\u65f6\u95f4\uff0c\u800cUTC\u65f6\u95f4\u6307UTC+0:00\u65f6\u533a\u7684\u65f6\u95f4\u3002<\/p>\n<p>\u4e00\u4e2a<code>datetime<\/code>\u7c7b\u578b\u6709\u4e00\u4e2a\u65f6\u533a\u5c5e\u6027<code>tzinfo<\/code>\uff0c\u4f46\u662f\u9ed8\u8ba4\u4e3a<code>None<\/code>\uff0c\u6240\u4ee5\u65e0\u6cd5\u533a\u5206\u8fd9\u4e2a<code>datetime<\/code>\u5230\u5e95\u662f\u54ea\u4e2a\u65f6\u533a\uff0c\u9664\u975e\u5f3a\u884c\u7ed9<code>datetime<\/code>\u8bbe\u7f6e\u4e00\u4e2a\u65f6\u533a\uff1a<\/p>\n<pre><code class=\"python\"><span class=\"prompt\">&gt;&gt;&gt; <\/span><span class=\"keyword\">from<\/span> datetime <span class=\"keyword\">import<\/span> datetime, timedelta, timezone\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>tz_utc_8 = timezone(timedelta(hours=<span class=\"number\">8<\/span>)) <span class=\"comment\"># \u521b\u5efa\u65f6\u533aUTC+8:00<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>now = datetime.now()\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>now\r\ndatetime.datetime(<span class=\"number\">2015<\/span>, <span class=\"number\">5<\/span>, <span class=\"number\">18<\/span>, <span class=\"number\">17<\/span>, <span class=\"number\">2<\/span>, <span class=\"number\">10<\/span>, <span class=\"number\">871012<\/span>)\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>dt = now.replace(tzinfo=tz_utc_8) <span class=\"comment\"># \u5f3a\u5236\u8bbe\u7f6e\u4e3aUTC+8:00<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>dt\r\ndatetime.datetime(<span class=\"number\">2015<\/span>, <span class=\"number\">5<\/span>, <span class=\"number\">18<\/span>, <span class=\"number\">17<\/span>, <span class=\"number\">2<\/span>, <span class=\"number\">10<\/span>, <span class=\"number\">871012<\/span>, tzinfo=datetime.timezone(datetime.timedelta(<span class=\"number\">0<\/span>, <span class=\"number\">28800<\/span>)))\r\n<\/code><\/pre>\n<p>\u5982\u679c\u7cfb\u7edf\u65f6\u533a\u6070\u597d\u662fUTC+8:00\uff0c\u90a3\u4e48\u4e0a\u8ff0\u4ee3\u7801\u5c31\u662f\u6b63\u786e\u7684\uff0c\u5426\u5219\uff0c\u4e0d\u80fd\u5f3a\u5236\u8bbe\u7f6e\u4e3aUTC+8:00\u65f6\u533a\u3002<\/p>\n<p>&nbsp;<\/p>\n<h3 id=\"-\">\u65f6\u533a\u8f6c\u6362<\/h3>\n<p>\u6211\u4eec\u53ef\u4ee5\u5148\u901a\u8fc7<code>utcnow()<\/code>\u62ff\u5230\u5f53\u524d\u7684UTC\u65f6\u95f4\uff0c\u518d\u8f6c\u6362\u4e3a\u4efb\u610f\u65f6\u533a\u7684\u65f6\u95f4\uff1a<\/p>\n<pre><code class=\"python\"><span class=\"comment\"># \u62ff\u5230UTC\u65f6\u95f4\uff0c\u5e76\u5f3a\u5236\u8bbe\u7f6e\u65f6\u533a\u4e3aUTC+0:00:<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>utc_dt = datetime.utcnow().replace(tzinfo=timezone.utc)\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>print(utc_dt)\r\n<span class=\"number\">2015<\/span>-<span class=\"number\">05<\/span>-<span class=\"number\">18<\/span> <span class=\"number\">09<\/span>:<span class=\"number\">05<\/span>:<span class=\"number\">12.377316<\/span>+<span class=\"number\">00<\/span>:<span class=\"number\">00<\/span>\r\n<span class=\"comment\"># astimezone()\u5c06\u8f6c\u6362\u65f6\u533a\u4e3a\u5317\u4eac\u65f6\u95f4:<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>bj_dt = utc_dt.astimezone(timezone(timedelta(hours=<span class=\"number\">8<\/span>)))\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>print(bj_dt)\r\n<span class=\"number\">2015<\/span>-<span class=\"number\">05<\/span>-<span class=\"number\">18<\/span> <span class=\"number\">17<\/span>:<span class=\"number\">05<\/span>:<span class=\"number\">12.377316<\/span>+<span class=\"number\">08<\/span>:<span class=\"number\">00<\/span>\r\n<span class=\"comment\"># astimezone()\u5c06\u8f6c\u6362\u65f6\u533a\u4e3a\u4e1c\u4eac\u65f6\u95f4:<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>tokyo_dt = utc_dt.astimezone(timezone(timedelta(hours=<span class=\"number\">9<\/span>)))\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>print(tokyo_dt)\r\n<span class=\"number\">2015<\/span>-<span class=\"number\">05<\/span>-<span class=\"number\">18<\/span> <span class=\"number\">18<\/span>:<span class=\"number\">05<\/span>:<span class=\"number\">12.377316<\/span>+<span class=\"number\">09<\/span>:<span class=\"number\">00<\/span>\r\n<span class=\"comment\"># astimezone()\u5c06bj_dt\u8f6c\u6362\u65f6\u533a\u4e3a\u4e1c\u4eac\u65f6\u95f4:<\/span>\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>tokyo_dt2 = bj_dt.astimezone(timezone(timedelta(hours=<span class=\"number\">9<\/span>)))\r\n<span class=\"prompt\">&gt;&gt;&gt; <\/span>print(tokyo_dt2)\r\n<span class=\"number\">2015<\/span>-<span class=\"number\">05<\/span>-<span class=\"number\">18<\/span> <span class=\"number\">18<\/span>:<span class=\"number\">05<\/span>:<span class=\"number\">12.377316<\/span>+<span class=\"number\">09<\/span>:<span class=\"number\">00<\/span><\/code><\/pre>\n<p>\u65f6\u533a\u8f6c\u6362\u7684\u5173\u952e\u5728\u4e8e\uff0c\u62ff\u5230\u4e00\u4e2a<code>datetime<\/code>\u65f6\uff0c\u8981\u83b7\u77e5\u5176\u6b63\u786e\u7684\u65f6\u533a\uff0c\u7136\u540e\u5f3a\u5236\u8bbe\u7f6e\u65f6\u533a\uff0c\u4f5c\u4e3a\u57fa\u51c6\u65f6\u95f4\u3002<\/p>\n<p>\u5229\u7528\u5e26\u65f6\u533a\u7684<code>datetime<\/code>\uff0c\u901a\u8fc7<code>astimezone()<\/code>\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8f6c\u6362\u5230\u4efb\u610f\u65f6\u533a\u3002<\/p>\n<p>\u6ce8\uff1a\u4e0d\u662f\u5fc5\u987b\u4eceUTC+0:00\u65f6\u533a\u8f6c\u6362\u5230\u5176\u4ed6\u65f6\u533a\uff0c\u4efb\u4f55\u5e26\u65f6\u533a\u7684<code>datetime<\/code>\u90fd\u53ef\u4ee5\u6b63\u786e\u8f6c\u6362\uff0c\u4f8b\u5982\u4e0a\u8ff0<code>bj_dt<\/code>\u5230<code>tokyo_dt<\/code>\u7684\u8f6c\u6362\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>datetime \u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4 &gt;&gt;&gt; from datetime import da &hellip; <a href=\"https:\/\/blog.la998.com\/?p=276\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">python \u5e38\u7528\u5185\u5efa\u6a21\u5757-datetime<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-276","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"https:\/\/blog.la998.com\/index.php?rest_route=\/wp\/v2\/posts\/276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.la998.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.la998.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.la998.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.la998.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=276"}],"version-history":[{"count":1,"href":"https:\/\/blog.la998.com\/index.php?rest_route=\/wp\/v2\/posts\/276\/revisions"}],"predecessor-version":[{"id":277,"href":"https:\/\/blog.la998.com\/index.php?rest_route=\/wp\/v2\/posts\/276\/revisions\/277"}],"wp:attachment":[{"href":"https:\/\/blog.la998.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.la998.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.la998.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}