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class="left">RxPY 资源</h2> <a target="_top" href="/rxpy/rxpy_useful_resources.html">RxPY - 有用的资源</a> <br><br> </div> </div> </div> <div class="w3-main w3-light-grey" id="belowtopnav" style="margin-left:220px;"> <div class="w3-row w3-white"> <div class="w3-col l10 m12" id="main"> <div id="mainLeaderboard"> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-2533243013167625" crossorigin="anonymous"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-2533243013167625" data-ad-slot="6169221284" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <div class="w3-clear nextprev"> <a class="w3-left w3-btn" href="index.html">❮ 上一节</a> <a class="w3-right w3-btn" href="index.html">下一节 ❯</a> </div> <hr/> <h1>RxPY - 实用程序运算符</h1> <h2>delay</h2> <p>该运算符将根据给定的时间或日期延迟源可观测排放。</p> <h3>语法</h3> <pre class="result notranslate"> delay(timespan) </pre> <h3>参数</h3> <p>timespan: 这将是以秒或日期为单位的时间。</p> <h3>返回值</h3> <p>它将在超时后返回一个带有源值的可观察对象。</p> <h3>示例</h3> <pre class="prettyprint notranslate jsHigh"> from rx import of, operators as op import datetime test1 = of(1,2,3,4,5) sub1 = test1.pipe( op.delay(5.0) ) sub1.subscribe(lambda x: print("The value is {0}".format(x))) input("Press any key to exit\n") </pre> <h3>输出</h3> <pre class="result notranslate"> E:\pyrx>python testrx.py Press any key to exit The value is 1 The value is 2 The value is 3 The value is 4 The value is 5 </pre> <hr/> <h2>materialize</h2> <p>此运算符会将来自源可观察值的值转换为以显式通知值的形式发出的值。</p> <h3>语法</h3> <pre class="result notranslate"> materialize() </pre> <h3>返回值</h3> <p>这将返回一个 observable，其中包含以显式通知值的形式发出的值。</p> <h3>示例</h3> <pre class="prettyprint notranslate jsHigh"> from rx import of, operators as op import datetime test1 = of(1,2,3,4,5) sub1 = test1.pipe( op.materialize() ) sub1.subscribe(lambda x: print("The value is {0}".format(x))) </pre> <h3>输出</h3> <pre class="result notranslate"> E:\pyrx>python testrx.py The value is OnNext(1.0) The value is OnNext(2.0) The value is OnNext(3.0) The value is OnNext(4.0) The value is OnNext(5.0) The value is OnCompleted() </pre> <hr/> <h2>time_interval</h2> <p>此运算符将给出来自源可观察值的值之间经过的时间。</p> <h3>语法</h3> <pre class="result notranslate"> time_interval() </pre> <h3>返回值</h3> <p>它将返回一个 Observable，该 Observable 将在发出的源值之间经过一段时间。</p> <h3>示例</h3> <pre class="prettyprint notranslate jsHigh"> from rx import of, operators as op from datetime import date test = of(1,2,3,4,5,6) sub1 = test.pipe( op.time_interval() ) sub1.subscribe(lambda x: print("The value is {0}".format(x))) </pre> <h3>输出</h3> <pre class="result notranslate"> E:\pyrx>python testrx.py The value is TimeInterval(value=1, interval=datetime.timedelta(microseconds=1000 )) The value is TimeInterval(value=2, interval=datetime.timedelta(0)) The value is TimeInterval(value=3, interval=datetime.timedelta(0)) The value is TimeInterval(value=4, interval=datetime.timedelta(microseconds=1000 )) The value is TimeInterval(value=5, interval=datetime.timedelta(0)) The value is TimeInterval(value=6, interval=datetime.timedelta(0)) </pre> <hr/> <h2>timeout</h2> <p>该运算符将在经过的时间后给出源可观察对象的所有值，否则将触发错误。</p> <h3>语法</h3> <pre class="result notranslate"> timeout(duetime) </pre> <h3>参数</h3> <p>duetime: 以秒为单位给出的时间。</p> <h3>返回值</h3> <p>它将返回 observable 以及来自源 observable 的所有值。</p> <h3>示例</h3> <pre class="prettyprint notranslate jsHigh"> from rx import of, operators as op from datetime import date test = of(1,2,3,4,5,6) sub1 = test.pipe( op.timeout(5.0) ) sub1.subscribe(lambda x: print("The value is {0}".format(x))) </pre> <h3>输出</h3> <pre class="result notranslate"> E:\pyrx>python testrx.py The value is 1 The value is 2 The value is 3 The value is 4 The value is 5 The value is 6 </pre> <hr/> <h2>timestamp</h2> <p>此运算符会将时间戳附加到源可观察对象的所有值。</p> <h3>语法</h3> <pre class="result notranslate"> timestamp() </pre> <h3>返回值</h3> <p>它将返回一个 observable，其中包含来自源 observable 的所有值以及时间戳。</p> <h3>示例</h3> <pre class="prettyprint notranslate jsHigh"> from rx import of, operators as op from datetime import date test = of(1,2,3,4,5,6) sub1 = test.pipe( op.timestamp() ) sub1.subscribe(lambda x: print("The value is {0}".format(x))) </pre> <h3>输出</h3> <pre class="result notranslate"> E:\pyrx>python testrx.py The value is Timestamp(value=1, timestamp=datetime.datetime(2019, 11, 4, 4, 57, 44, 667243)) The value is Timestamp(value=2, timestamp=datetime.datetime(2019, 11, 4, 4, 57, 44, 668243)) The value is Timestamp(value=3, timestamp=datetime.datetime(2019, 11, 4, 4, 57, 44, 668243)) The value is Timestamp(value=4, timestamp=datetime.datetime(2019, 11, 4, 4, 57, 44, 668243)) The value is Timestamp(value=5, timestamp=datetime.datetime(2019, 11, 4, 4, 57, 44, 669243)) The value is Timestamp(value=6, timestamp=datetime.datetime(2019, 11, 4, 4, 57, 44, 669243)) </pre> <hr/> <div class="w3-clear nextprev"> <a class="w3-left w3-btn" href="index.html">❮ 上一节</a> <a 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