{"id":1000266,"date":"2024-12-27T09:48:32","date_gmt":"2024-12-27T01:48:32","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1000266.html"},"modified":"2024-12-27T09:48:34","modified_gmt":"2024-12-27T01:48:34","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8python%e8%bf%9e%e6%8e%a5hdfs","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1000266.html","title":{"rendered":"\u5982\u4f55\u4f7f\u7528python\u8fde\u63a5hdfs"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25074925\/9a875a7d-26fd-434e-a79f-e9993405be3d.webp\" alt=\"\u5982\u4f55\u4f7f\u7528python\u8fde\u63a5hdfs\" \/><\/p>\n<p><p> \u5f00\u5934\u6bb5\u843d:<br \/>\u8981\u4f7f\u7528Python\u8fde\u63a5HDFS\uff08Hadoop\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\uff09\uff0c\u53ef\u4ee5\u901a\u8fc7<strong>\u4f7f\u7528PyArrow\u5e93\u3001\u4f7f\u7528hdfs\u5e93\u3001\u4f7f\u7528WebHDFS API<\/strong>\u8fd9\u51e0\u79cd\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002\u5176\u4e2d\uff0c\u4f7f\u7528PyArrow\u5e93\u662f\u4e00\u79cd\u8f83\u4e3a\u9ad8\u6548\u548c\u7b80\u4fbf\u7684\u65b9\u6cd5\u3002PyArrow\u662f\u4e00\u4e2a\u5e7f\u6cdb\u7528\u4e8e\u5904\u7406\u5927\u6570\u636e\u7684\u5e93\uff0c\u80fd\u591f\u4e0eHadoop\u751f\u6001\u7cfb\u7edf\u7684\u5176\u4ed6\u7ec4\u4ef6\u65e0\u7f1d\u96c6\u6210\u3002\u4f7f\u7528PyArrow\u8fde\u63a5HDFS\u7684\u6b65\u9aa4\u4e3b\u8981\u5305\u62ec\uff1a\u5b89\u88c5PyArrow\u3001\u914d\u7f6eHDFS\u8fde\u63a5\u3001\u5b9e\u73b0\u6587\u4ef6\u7684\u8bfb\u5199\u64cd\u4f5c\u3002\u914d\u7f6eHDFS\u8fde\u63a5\u65f6\uff0c\u9700\u8981\u786e\u4fdd\u80fd\u591f\u8bbf\u95ee\u5230HDFS\u7684NameNode\u5730\u5740\uff0c\u5e76\u6709\u9002\u5f53\u7684\u6743\u9650\u8fdb\u884c\u6587\u4ef6\u64cd\u4f5c\u3002\u901a\u8fc7PyArrow\u8bfb\u53d6\u548c\u5199\u5165HDFS\u6587\u4ef6\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5904\u7406\u5927\u6570\u636e\u96c6\uff0c\u5e76\u8fdb\u884c\u540e\u7eed\u7684\u6570\u636e\u5206\u6790\u548c\u5904\u7406\u3002<\/p>\n<\/p>\n<p><p>\u4e00\u3001\u4f7f\u7528PYARROW\u8fde\u63a5HDFS<\/p>\n<\/p>\n<p><p>PyArrow\u662fApache Arrow\u9879\u76ee\u7684\u4e00\u90e8\u5206\uff0c\u4e3aPython\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u548c\u5206\u6790\u63a5\u53e3\u3002\u5b83\u80fd\u591f\u4e0eHDFS\u8fdb\u884c\u65e0\u7f1d\u8fde\u63a5\uff0c\u4f7f\u5f97\u5904\u7406\u5927\u6570\u636e\u96c6\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\u3002<\/p>\n<\/p>\n<ol>\n<li>\u5b89\u88c5PyArrow<\/li>\n<\/ol>\n<p><p>\u9996\u5148\uff0c\u9700\u8981\u786e\u4fdd\u4f60\u7684Python\u73af\u5883\u4e2d\u5df2\u7ecf\u5b89\u88c5\u4e86PyArrow\u5e93\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u5b89\u88c5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install pyarrow<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7<code>import pyarrow<\/code>\u6765\u9a8c\u8bc1\u5b89\u88c5\u662f\u5426\u6210\u529f\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>\u914d\u7f6eHDFS\u8fde\u63a5<\/li>\n<\/ol>\n<p><p>PyArrow\u63d0\u4f9b\u4e86<code>HadoopFileSystem<\/code>\u7c7b\uff0c\u7528\u4e8e\u8fde\u63a5HDFS\u3002\u5728\u914d\u7f6e\u8fde\u63a5\u65f6\uff0c\u9700\u8981\u77e5\u9053HDFS\u7684NameNode\u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002\u901a\u5e38\uff0cHDFS\u7684\u9ed8\u8ba4\u7aef\u53e3\u4e3a8020\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pyarrow as pa<\/p>\n<p>hdfs = pa.hdfs.connect(&#39;namenode_address&#39;, port=8020, user=&#39;your_username&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>namenode_address<\/code>\u662fHDFS NameNode\u7684\u5730\u5740\uff0c<code>your_username<\/code>\u662f\u7528\u4e8e\u8fde\u63a5\u7684\u7528\u6237\u540d\u3002<\/p>\n<\/p>\n<ol start=\"3\">\n<li>\u8bfb\u53d6\u548c\u5199\u5165HDFS\u6587\u4ef6<\/li>\n<\/ol>\n<p><p>\u8fde\u63a5\u6210\u529f\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528PyArrow\u63d0\u4f9b\u7684\u65b9\u6cd5\u8fdb\u884c\u6587\u4ef6\u7684\u8bfb\u5199\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u8bfb\u53d6\u4e00\u4e2aHDFS\u6587\u4ef6\u5e76\u5c06\u5176\u5185\u5bb9\u8f93\u51fa\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">with hdfs.open(&#39;\/path\/to\/hdfs\/file.txt&#39;, &#39;rb&#39;) as f:<\/p>\n<p>    data = f.read()<\/p>\n<p>    print(data)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5199\u5165\u6587\u4ef6\u5219\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">with hdfs.open(&#39;\/path\/to\/hdfs\/new_file.txt&#39;, &#39;wb&#39;) as f:<\/p>\n<p>    f.write(b&#39;Hello, HDFS!&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u5728HDFS\u4e2d\u8fdb\u884c\u6587\u4ef6\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><p>\u4e8c\u3001\u4f7f\u7528HDFS\u5e93\u8fde\u63a5HDFS<\/p>\n<\/p>\n<p><p>\u53e6\u4e00\u4e2a\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528hdfs\u5e93\u6765\u8fde\u63a5HDFS\u3002\u8fd9\u4e2a\u5e93\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u5316\u7684\u63a5\u53e3\uff0c\u9002\u5408\u5feb\u901f\u5f00\u53d1\u548c\u6d4b\u8bd5\u3002<\/p>\n<\/p>\n<ol>\n<li>\u5b89\u88c5hdfs\u5e93<\/li>\n<\/ol>\n<p><p>\u9996\u5148\uff0c\u5b89\u88c5hdfs\u5e93\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install hdfs<\/p>\n<p><\/code><\/pre>\n<\/p>\n<ol start=\"2\">\n<li>\u914d\u7f6eHDFS\u8fde\u63a5<\/li>\n<\/ol>\n<p><p>\u4f7f\u7528hdfs\u5e93\uff0c\u53ef\u4ee5\u901a\u8fc7<code>InsecureClient<\/code>\u7c7b\u6765\u8fde\u63a5HDFS\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from hdfs import InsecureClient<\/p>\n<p>client = InsecureClient(&#39;http:\/\/namenode_address:50070&#39;, user=&#39;your_username&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>namenode_address<\/code>\u662fHDFS NameNode\u7684\u5730\u5740\uff0c<code>your_username<\/code>\u662f\u7528\u4e8e\u8fde\u63a5\u7684\u7528\u6237\u540d\u3002<\/p>\n<\/p>\n<ol start=\"3\">\n<li>\u8bfb\u53d6\u548c\u5199\u5165HDFS\u6587\u4ef6<\/li>\n<\/ol>\n<p><p>\u4f7f\u7528hdfs\u5e93\uff0c\u8bfb\u53d6\u6587\u4ef6\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">with client.read(&#39;\/path\/to\/hdfs\/file.txt&#39;, encoding=&#39;utf-8&#39;) as reader:<\/p>\n<p>    content = reader.read()<\/p>\n<p>    print(content)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5199\u5165\u6587\u4ef6\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">client.write(&#39;\/path\/to\/hdfs\/new_file.txt&#39;, data=&#39;Hello, HDFS!&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>hdfs\u5e93\u63d0\u4f9b\u4e86\u7b80\u6d01\u7684\u63a5\u53e3\uff0c\u9002\u5408\u5feb\u901f\u5f00\u53d1\u548c\u8c03\u8bd5\u3002<\/p>\n<\/p>\n<p><p>\u4e09\u3001\u4f7f\u7528WebHDFS API\u8fde\u63a5HDFS<\/p>\n<\/p>\n<p><p>WebHDFS API\u662fHadoop\u63d0\u4f9b\u7684\u4e00\u4e2aRESTful\u63a5\u53e3\uff0c\u53ef\u4ee5\u901a\u8fc7HTTP\u8bf7\u6c42\u4e0eHDFS\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n<\/p>\n<ol>\n<li>\u53d1\u9001HTTP\u8bf7\u6c42<\/li>\n<\/ol>\n<p><p>\u53ef\u4ee5\u4f7f\u7528Python\u7684requests\u5e93\u6765\u53d1\u9001HTTP\u8bf7\u6c42\uff0c\u8bbf\u95eeWebHDFS API\u3002\u9996\u5148\u9700\u8981\u5b89\u88c5requests\u5e93\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install requests<\/p>\n<p><\/code><\/pre>\n<\/p>\n<ol start=\"2\">\n<li>\u914d\u7f6eHDFS\u8fde\u63a5<\/li>\n<\/ol>\n<p><p>\u8981\u8fde\u63a5HDFS\uff0c\u9700\u8981\u77e5\u9053WebHDFS\u7684API\u5730\u5740\u548c\u7aef\u53e3\uff0c\u901a\u5e38\u4e3a50070\u62169870\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import requests<\/p>\n<p>namenode_address = &#39;http:\/\/namenode_address:50070&#39;<\/p>\n<p>path = &#39;\/webhdfs\/v1\/path\/to\/hdfs\/file.txt?op=OPEN&#39;<\/p>\n<p>response = requests.get(namenode_address + path, auth=(&#39;your_username&#39;, &#39;your_password&#39;))<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>namenode_address<\/code>\u662fHDFS NameNode\u7684\u5730\u5740\uff0c<code>your_username<\/code>\u548c<code>your_password<\/code>\u662f\u7528\u4e8e\u8fde\u63a5\u7684\u7528\u6237\u540d\u548c\u5bc6\u7801\u3002<\/p>\n<\/p>\n<ol start=\"3\">\n<li>\u5904\u7406\u54cd\u5e94<\/li>\n<\/ol>\n<p><p>\u53d1\u9001\u8bf7\u6c42\u540e\uff0c\u53ef\u4ee5\u6839\u636e\u54cd\u5e94\u72b6\u6001\u7801\u5224\u65ad\u8bf7\u6c42\u662f\u5426\u6210\u529f\uff0c\u5e76\u5904\u7406\u54cd\u5e94\u6570\u636e\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">if response.status_code == 200:<\/p>\n<p>    print(response.content)<\/p>\n<p>else:<\/p>\n<p>    print(&#39;Error:&#39;, response.status_code, response.content)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u901a\u8fc7HTTP\u534f\u8bae\u4e0eHDFS\u8fdb\u884c\u4ea4\u4e92\uff0c\u9002\u7528\u4e8e\u9700\u8981\u8de8\u5e73\u53f0\u6216\u8bed\u8a00\u8fdb\u884c\u8bbf\u95ee\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n<p><p>\u56db\u3001HDFS\u4e0ePython\u7684\u96c6\u6210\u5e94\u7528<\/p>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cPython\u4e0eHDFS\u7684\u7ed3\u5408\u53ef\u4ee5\u7528\u4e8e\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u96c6\uff0c\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c<a href=\"https:\/\/docs.pingcode.com\/ask\/59192.html\" target=\"_blank\">\u673a\u5668\u5b66\u4e60<\/a>\u4efb\u52a1\u3002<\/p>\n<\/p>\n<ol>\n<li>\u6570\u636e\u5206\u6790<\/li>\n<\/ol>\n<p><p>Python\u7684\u5f3a\u5927\u6570\u636e\u5206\u6790\u5e93\uff0c\u5982pandas\u548cnumpy\uff0c\u53ef\u4ee5\u4e0eHDFS\u7ed3\u5408\uff0c\u5904\u7406\u6d77\u91cf\u6570\u636e\u3002\u901a\u8fc7\u8bfb\u53d6HDFS\u4e2d\u7684\u6570\u636e\u6587\u4ef6\uff0c\u6570\u636e\u79d1\u5b66\u5bb6\u53ef\u4ee5\u5728\u672c\u5730\u8fdb\u884c\u6570\u636e\u9884\u5904\u7406\u3001\u6e05\u6d17\u548c\u5206\u6790\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>\u673a\u5668\u5b66\u4e60<\/li>\n<\/ol>\n<p><p>\u5bf9\u4e8e\u9700\u8981\u8bad\u7ec3\u5927\u89c4\u6a21\u6570\u636e\u96c6\u7684\u673a\u5668\u5b66\u4e60\u4efb\u52a1\uff0cHDFS\u662f\u7406\u60f3\u7684\u6570\u636e\u5b58\u50a8\u89e3\u51b3\u65b9\u6848\u3002Python\u7684\u673a\u5668\u5b66\u4e60\u5e93\uff0c\u5982scikit-learn\u548cTensorFlow\uff0c\u53ef\u4ee5\u4e0eHDFS\u65e0\u7f1d\u96c6\u6210\uff0c\u76f4\u63a5\u4eceHDFS\u8bfb\u53d6\u8bad\u7ec3\u6570\u636e\u3002<\/p>\n<\/p>\n<ol start=\"3\">\n<li>\u6570\u636e\u6d41\u5904\u7406<\/li>\n<\/ol>\n<p><p>\u5728\u5b9e\u65f6\u6570\u636e\u6d41\u5904\u7406\u573a\u666f\u4e2d\uff0cPython\u53ef\u4ee5\u4e0eHDFS\u7ed3\u5408\uff0c\u5904\u7406\u6765\u81eaKafka\u3001Flume\u7b49\u6570\u636e\u6e90\u7684\u6570\u636e\u6d41\u3002\u901a\u8fc7\u5c06\u5904\u7406\u540e\u7684\u6570\u636e\u5b58\u50a8\u5728HDFS\u4e2d\uff0c\u53ef\u4ee5\u5b9e\u73b0\u6570\u636e\u7684\u6301\u4e45\u5316\u548c\u540e\u7eed\u5206\u6790\u3002<\/p>\n<\/p>\n<p><p>\u4e94\u3001\u89e3\u51b3\u5e38\u89c1\u95ee\u9898\u548c\u4f18\u5316\u5efa\u8bae<\/p>\n<\/p>\n<p><p>\u5728\u4f7f\u7528Python\u8fde\u63a5HDFS\u7684\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u4e00\u4e9b\u5e38\u89c1\u95ee\u9898\u548c\u6311\u6218\uff0c\u9700\u8981\u91c7\u53d6\u76f8\u5e94\u7684\u63aa\u65bd\u8fdb\u884c\u89e3\u51b3\u548c\u4f18\u5316\u3002<\/p>\n<\/p>\n<ol>\n<li>\u7f51\u7edc\u8fde\u63a5\u95ee\u9898<\/li>\n<\/ol>\n<p><p>\u5728\u914d\u7f6eHDFS\u8fde\u63a5\u65f6\uff0c\u786e\u4fdd\u7f51\u7edc\u8fde\u63a5\u6b63\u5e38\uff0c\u80fd\u591f\u8bbf\u95ee\u5230HDFS\u7684NameNode\u5730\u5740\u3002\u5982\u679c\u8fde\u63a5\u5931\u8d25\uff0c\u68c0\u67e5\u7f51\u7edc\u914d\u7f6e\u3001\u9632\u706b\u5899\u8bbe\u7f6e\u548cHDFS\u7684\u8bbf\u95ee\u6743\u9650\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>\u6743\u9650\u95ee\u9898<\/li>\n<\/ol>\n<p><p>\u786e\u4fdd\u7528\u4e8e\u8fde\u63a5\u7684\u7528\u6237\u540d\u5177\u6709\u8db3\u591f\u7684\u6743\u9650\u8fdb\u884c\u6587\u4ef6\u7684\u8bfb\u5199\u64cd\u4f5c\u3002\u5982\u679c\u9047\u5230\u6743\u9650\u4e0d\u8db3\u7684\u95ee\u9898\uff0c\u53ef\u4ee5\u8054\u7cfbHDFS\u7ba1\u7406\u5458\u8fdb\u884c\u6743\u9650\u914d\u7f6e\u3002<\/p>\n<\/p>\n<ol start=\"3\">\n<li>\u6027\u80fd\u4f18\u5316<\/li>\n<\/ol>\n<p><p>\u5728\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u96c6\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u6027\u80fd\u74f6\u9888\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u8fdb\u884c\u4f18\u5316\uff1a<\/p>\n<\/p>\n<ul>\n<li><strong>\u6279\u91cf\u64cd\u4f5c<\/strong>\uff1a\u5728\u8bfb\u53d6\u548c\u5199\u5165\u6570\u636e\u65f6\uff0c\u5c3d\u91cf\u4f7f\u7528\u6279\u91cf\u64cd\u4f5c\uff0c\u51cf\u5c11\u7f51\u7edc\u8bf7\u6c42\u6b21\u6570\u3002<\/li>\n<li><strong>\u5e76\u884c\u5904\u7406<\/strong>\uff1a\u4f7f\u7528\u591a\u7ebf\u7a0b\u6216\u591a\u8fdb\u7a0b\u8fdb\u884c\u5e76\u884c\u5904\u7406\uff0c\u52a0\u901f\u6570\u636e\u7684\u8bfb\u5199\u901f\u5ea6\u3002<\/li>\n<li><strong>\u6570\u636e\u538b\u7f29<\/strong>\uff1a\u5728\u4f20\u8f93\u6570\u636e\u65f6\uff0c\u4f7f\u7528\u6570\u636e\u538b\u7f29\u6280\u672f\uff0c\u51cf\u5c11\u6570\u636e\u4f20\u8f93\u91cf\u3002<\/li>\n<\/ul>\n<p><p>\u901a\u8fc7\u91c7\u53d6\u8fd9\u4e9b\u63aa\u65bd\uff0c\u53ef\u4ee5\u63d0\u9ad8Python\u4e0eHDFS\u96c6\u6210\u5e94\u7528\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u914d\u7f6eHDFS\u8fde\u63a5\uff1f<\/strong><br \/>\u8981\u5728Python\u4e2d\u8fde\u63a5HDFS\uff0c\u9996\u5148\u9700\u8981\u5b89\u88c5<code>hdfs<\/code>\u5e93\uff0c\u53ef\u4ee5\u901a\u8fc7\u8fd0\u884c<code>pip install hdfs<\/code>\u6765\u5b9e\u73b0\u3002\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u8fdb\u884c\u8fde\u63a5\uff1a  <\/p>\n<pre><code class=\"language-python\">from hdfs import InsecureClient\n\nclient = InsecureClient(&#39;http:\/\/&lt;hdfs-namenode&gt;:&lt;port&gt;&#39;, user=&#39;&lt;username&gt;&#39;)\n<\/code><\/pre>\n<p>\u786e\u4fdd\u66ff\u6362<code>&lt;hdfs-namenode&gt;<\/code>\u3001<code>&lt;port&gt;<\/code>\u548c<code>&lt;username&gt;<\/code>\u4e3a\u60a8\u7684HDFS\u914d\u7f6e\u53c2\u6570\u3002<\/p>\n<p><strong>\u5728\u4f7f\u7528Python\u8fde\u63a5HDFS\u65f6\u9700\u8981\u6ce8\u610f\u54ea\u4e9b\u6743\u9650\u95ee\u9898\uff1f<\/strong><br \/>\u5728\u8fde\u63a5HDFS\u4e4b\u524d\uff0c\u786e\u4fdd\u6240\u7528\u7528\u6237\u5177\u6709\u5bf9HDFS\u7684\u8bbf\u95ee\u6743\u9650\u3002\u53ef\u4ee5\u901a\u8fc7HDFS\u547d\u4ee4\u884c\u5de5\u5177\u6216Web\u754c\u9762\u68c0\u67e5\u7528\u6237\u7684\u6743\u9650\u8bbe\u7f6e\u3002\u5982\u679c\u6ca1\u6709\u5408\u9002\u7684\u6743\u9650\uff0c\u5c06\u65e0\u6cd5\u6210\u529f\u8fde\u63a5\u548c\u6267\u884c\u6570\u636e\u8bfb\u53d6\u6216\u5199\u5165\u64cd\u4f5c\u3002<\/p>\n<p><strong>\u5982\u4f55\u5728Python\u4e2d\u8bfb\u53d6HDFS\u6587\u4ef6\uff1f<\/strong><br \/>\u8fde\u63a5\u5230HDFS\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528<code>read<\/code>\u65b9\u6cd5\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5b9e\u73b0\uff1a  <\/p>\n<pre><code class=\"language-python\">with client.read(&#39;\/path\/to\/file.txt&#39;, encoding=&#39;utf-8&#39;) as reader:\n    content = reader.read()\nprint(content)\n<\/code><\/pre>\n<p>\u786e\u4fdd\u6587\u4ef6\u8def\u5f84\u6b63\u786e\uff0c\u5e76\u4e14\u6587\u4ef6\u5b58\u5728\u4e8eHDFS\u4e2d\uff0c\u8fd9\u6837\u624d\u80fd\u6210\u529f\u8bfb\u53d6\u5185\u5bb9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5f00\u5934\u6bb5\u843d:\u8981\u4f7f\u7528Python\u8fde\u63a5HDFS\uff08Hadoop\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\uff09\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528PyArrow\u5e93\u3001\u4f7f\u7528hd [&hellip;]","protected":false},"author":3,"featured_media":1000273,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1000266"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1000266"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1000266\/revisions"}],"predecessor-version":[{"id":1000275,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1000266\/revisions\/1000275"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1000273"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1000266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1000266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1000266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}