Python的三大神器，你知道是哪三大吗？史上最详细的入门教程！
发布时间：2020-12-17 01:16:31 所属栏目：Python 来源：网络整理
导读：p style="margin-top:1em;margin-bottom:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,Arial,'Hiragino Sans GB','Microsoft YaHei',simsun;vertical-align:baseline;color:rgb(93,93,93);background-color:rgb(255,255,255);"
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<p style="margin-top:1em;margin-bottom:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,Arial,'Hiragino Sans GB','Microsoft YaHei',simsun;vertical-align:baseline;color:rgb(93,93,93);background-color:rgb(255,255,255);">Python的三大神器：装饰器.迭代器与生成器！这就是Python的三大神器，好了废话不多说。直接来上干货吧！ <p style="margin-top:1em;margin-bottom:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,255);">生成器<p style="margin-top:1em;margin-bottom:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,255);">仅仅拥有生成某种东西的能力，如果不用next方法是获取不到值得。<p style="margin-top:1em;margin-bottom:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,255);">创建一个生成器函数<pre style="margin-bottom:0px;padding-right:0px;padding-left:0px;border:0px;font-size:18px;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(93,255);"><pre class="source-code" style="margin-bottom:0px;padding:15px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;background:rgb(243,244,245);"><code style="margin:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;"><span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(153,153,153);">>>> <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;"><span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(149,65,33);">def <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(68,85,136);">scq<span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(0,255);">():<span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(153,153);">... print(<span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(33,145,97);">"11") <span style="margin:0px;padding:0px;border:0px;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(64,128,128);"># 当函数代码块中遇到yield关键字的时候，这个函数就是一个生成器函数 <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(153,153);">... <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(149,33);">yield <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(64,160,112);">1 <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(153,97);">"22") <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(153,112);">2 <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(153,97);">"33") <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(153,112);">3 ... <p style="margin-top:1em;margin-bottom:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,255);">把生成器赋值给一个对象<pre style="margin-bottom:0px;padding-right:0px;padding-left:0px;border:0px;font-size:18px;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(93,245);"><code style="margin:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;">>>> r = sc<span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(33,97);">q() <p style="margin-top:1em;margin-bottom:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,255);">查看r的苏剧类型并且输出r的值<pre style="margin-bottom:0px;padding-right:0px;padding-left:0px;border:0px;font-size:18px;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(93,153);">>>> print(type(r),r) <<span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;"><span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(149,33);">class '<span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(68,136);">generator'> <generator <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(68,136);">object <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(68,136);">scq <span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(68,136);">at 0<span style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;color:rgb(68,136);">x000001F117D8DF10> <p style="margin-top:1em;margin-bottom:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,255);">当执行生成器的next的时候，代码会按照顺序去执行，当执行到yield时会返回并提出，yield后面的值就是返回值，然后记录代码执行的位置，并退出<div class="pgc-img" style="margin:0px;padding:0px;border:0px;font-size:18px;line-height:inherit;font-family:helvetica,255);">
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