{"id":1904,"date":"2024-03-13T00:29:36","date_gmt":"2024-03-12T16:29:36","guid":{"rendered":"https:\/\/blog.xiunian.wang\/?p=1904"},"modified":"2024-03-13T00:29:36","modified_gmt":"2024-03-12T16:29:36","slug":"python%e5%b0%86%e5%9b%9e%e8%b0%83%e5%87%bd%e6%95%b0%e8%bd%ac%e4%b8%ba%e5%8f%af%e8%bf%ad%e4%bb%a3%e5%af%b9%e8%b1%a1%ef%bd%9cconvert-callback-into-generator-in-python","status":"publish","type":"post","link":"https:\/\/blog.xiunian.wang\/?p=1904","title":{"rendered":"Python\u5c06\u56de\u8c03\u51fd\u6570\u8f6c\u4e3a\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff5cconvert callback into generator in Python"},"content":{"rendered":"\n<p>\u5982\u4eca\u5404\u79cd\u8bed\u6cd5\u7cd6\u8d8a\u6765\u8d8a\u65b9\u4fbf\uff0c\u4ee5\u524d\u5f88\u591a\u96be\u4ee5\u76f4\u89c2\u7406\u89e3\u7684\u4ee3\u7801\uff0c\u901a\u8fc7\u8bed\u6cd5\u7cd6\u5305\u88c5\u4e0b\uff0c\u53d8\u5f97\u8d8a\u6765\u8d8a\u597d\u7528\uff0c\u5178\u578b\u7684\u6709 lambda\u8868\u8fbe\u5f0f\uff0c\u534f\u7a0b, flow, rx \u7b49\u7b49\uff0c\u7528\u8d77\u6765\u662f\u4e0d\u4ea6\u4e50\u4e4e\u3002<\/p>\n\n\n\n<p>\u5f88\u5bf9\u7b2c\u4e09\u65b9sdk\u4e5f\u9010\u6e10\u4ece\u4f20\u7edf\u7684callbck\u5f62\u5f0f\u9010\u6e10\u63d0\u4f9bflow\u5f62\u5f0f\u7684\u63a5\u53e3\uff0c\u8ba9\u9002\u7528\u65b9\u80fd\u591f\u6bd4\u8f83\u81ea\u7136\u7684\u63a5\u5165\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>\u6bd4\u5982\u8c03\u7528\u4e00\u4e2a\u65b9\u6cd5\u8c03\u7528\u623f\u9700\u8981\u5b9e\u65f6\u77e5\u9053\u8fdb\u5ea6\uff0c\u5047\u5982\u6709\u4e00\u4e2a\u7b2c\u4e09\u65b9\u6a21\u5757\u63d0\u4f9b\u4e00\u4e2a\u63a5\u53e3\u5982\u4e0b\uff0c\u53ef\u4ee5\u5b9e\u65f6\u8fd4\u56de\u8fdb\u5ea6\u4fe1\u606f<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">def third_party_sdk(callback):\n    # \u6a21\u62df\u7b2c\u4e09\u65b9SDK\u7684\u751f\u6210\n    for i in range(10):\n        callback(str(i))<\/pre>\n\n\n\n<p>\u90a3\u5982\u679c\u6211\u4eec\u9700\u8981\u8c03\u7528\u53ef\u4ee5\u5982\u4e0b\u7f16\u5199,\u975e\u5e38\u7b80\u5355\uff0c\u53ef\u4ee5\u5728\u62ff\u5230process\u65f6\u5b9e\u65f6\u6253\u5370\u51fa\u5f53\u524d\u8fdb\u5ea6<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">def process():\n    def print_process(current:str):\n        print(current)\n    third_party_sdk(print_process)\n\nif __name__ == \"__main__\":\n     process()<\/pre>\n\n\n\n<p>\u4f46\u662f\u8fd9\u91cc\u6709\u4e00\u5c42\u5d4c\u5957\u7684\u5185\u90e8\u51fd\u6570\u4ee3\u7801\uff0c\u867d\u7136\u53ef\u4ee5\u63d0\u51fa\u53bb\u5982\u679c\u60f3\u8981\u901a\u8fc7\u8fed\u4ee3\u5668\u8f93\u51fa\u5462\uff1f\u6bd4\u5982\u6211\u60f3\u901a\u8fc7\u8fed\u4ee3\u5668\u8f93\u51fa\u662f\u4e0d\u662f\u66f4\u6e05\u6670\uff0c\u6bd4\u5982<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">if __name__ == \"__main__\":\n    for x in process():\n        print(x)<\/pre>\n\n\n\n<p>\u770b\u8d77\u6765\u5f88\u7b80\u5355\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u5e76\u4e0d\u5bb9\u6613\uff0c\u56e0\u4e3a\u4e0d\u80fd\u4fee\u6539\u8c03\u7528\u7684\u7b2c\u4e09\u65b9\u51fd\u6570\uff0c\u4e00\u65e6\u8c03\u7528\u7b2c\u4e09\u65b9\u51fd\u6570\u5c31\u662f\u4f1a\u963b\u585e\uff0c\u5c31\u6ca1\u529e\u6cd5\u5b9e\u65f6\u751f\u6210\u8fed\u4ee3\u5668\u7684data\u4e86\u3002\u90a3\u600e\u4e48\u505a\u5462\uff1f\u53ef\u4ee5\u91c7\u7528\u591a\u7ebf\u7a0b+\u5217\u961f\u6765\u5b9e\u73b0\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u5e2e\u52a9\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"callback into generator\" data-enlighter-group=\"\">import threading\nfrom queue import Queue\ndef third_party_sdk(callback):\n    # \u6a21\u62df\u7b2c\u4e09\u65b9SDK\u7684\u751f\u6210\n    for i in range(10):\n        callback(str(i))\n\n\ndef process():\n    q = Queue(maxsize=1)\n    JOB_DONE = object()\n    TIMEOUT = 30\n    msgs = []\n\n    def callback(msg):\n        # todo \u5c06message \u901a\u8fc7yield\u8fd4\u56de\u7ed9\u4e0a\u5c42\n        # msgs.append(msg)\n        q.put(msg)\n\n    def task():\n        third_party_sdk(callback)\n        q.put(JOB_DONE)\n\n    t = threading.Thread(target=task)\n    t.start()\n    while True:\n        # better set a timeout, or if task in sub-threading fails, it will result in a deadlock\n        chunk = q.get(timeout=TIMEOUT)\n        if chunk is JOB_DONE:\n            break\n        yield chunk\n        \n    t.join()\n\nif __name__ == \"__main__\":\n    for x in process():\n        print(x)\n<\/pre>\n\n\n\n<p>\u867d\u7136\u770b\u8d77\u6765\u591a\u4e86\u5f88\u591a\u4ee3\u7801\uff0c\u4f46\u662f\u603b\u5f52\u662f\u80fd\u591f\u5b9e\u73b0\u7684\uff0c\u518d\u5c06\u8fd9\u79cd\u5c01\u88c5\u62bd\u6210\u65b9\u6cd5\uff0c\u90a3\u4e48\u518d\u4ee5\u540e\u5c31\u80fd\u6109\u5feb\u7684\u4f7f\u7528 process\u8fd4\u56de\u7684\u8fed\u4ee3\u5668\u6765\u5904\u7406\u4e8b\u4ef6\u5566\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4eca\u5404\u79cd\u8bed\u6cd5\u7cd6\u8d8a\u6765\u8d8a\u65b9\u4fbf\uff0c\u4ee5\u524d\u5f88\u591a\u96be\u4ee5\u76f4\u89c2\u7406\u89e3\u7684\u4ee3\u7801\uff0c\u901a\u8fc7\u8bed\u6cd5\u7cd6\u5305\u88c5\u4e0b\uff0c\u53d8\u5f97\u8d8a\u6765\u8d8a\u597d\u7528\uff0c\u5178\u578b\u7684\u6709 lambda\u8868\u8fbe\u5f0f\uff0c\u534f\u7a0b, flow, rx \u7b49\u7b49\uff0c\u7528\u8d77\u6765\u662f\u4e0d\u4ea6\u4e50\u4e4e\u3002 \u5f88\u5bf9\u7b2c\u4e09\u65b9sdk\u4e5f\u9010\u6e10\u4ece\u4f20\u7edf\u7684callbck\u5f62\u5f0f\u9010\u6e10\u63d0\u4f9bflow\u5f62\u5f0f\u7684\u63a5\u53e3\uff0c\u8ba9\u9002\u7528\u65b9\u80fd\u591f\u6bd4\u8f83\u81ea\u7136\u7684\u63a5\u5165\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[26],"_links":{"self":[{"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/posts\/1904"}],"collection":[{"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1904"}],"version-history":[{"count":10,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/posts\/1904\/revisions"}],"predecessor-version":[{"id":1914,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/posts\/1904\/revisions\/1914"}],"wp:attachment":[{"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}