python以什么划分句块

def happy():    print("Very Happy!")happy()

x = 1while x <p>在用while的时候，冒号以后需要进行缩进，标记语句块。</p><p><img src="https://img.php.cn/upload/image/677/224/124/1572923547871725.png" title="1572923547871725.png" alt="08020b1d317dcb066cdc55c4143861c.png"></p><pre class="brush:php;toolbar:false">x = 1if x <p>在用if和else语句的时候，冒号以后需要进行缩进，标记语句块。</p><p><img src="https://img.php.cn/upload/image/622/446/574/1572923556177993.png" title="1572923556177993.png" alt="ac295ee792041b638ffda0b5061d46d.png"></p><p>如果不用标记语句块，是会报错的。</p><p><img src="https://img.php.cn/upload/image/123/406/873/1572923562156891.png" title="1572923562156891.png" alt="f6f7c05c5cd732a3a182973c49b285b.png"></p><pre class="brush:php;toolbar:false">def hey():    x = 1    while x <p>每一次冒号以后都是需要标记语句块，而且要根据格式一层一层标记。</p><p><img src="https://img.php.cn/upload/image/844/355/996/1572923566834059.png" title="1572923566834059.png" alt="07b9bc4bbc57e7c28dc25c72fe41e11.png"></p>