一、校验数字的表达式 数字：^[0-9]*$ n位的数字：^\d{n}$ 至少n位的数字：^\d{n,}$ m-n位的数字：^\d{m,n}$ 零和非零开头的数字：^(0|[1-9][0-9]*)$

Effective visualizations to discover what makes a writer’s style unique

Python 代码阅读合集介绍：为什么不推荐Python初学者直接看项目源码本篇阅读的代码实现了根据给定的谓词函数和属性字符串，来构造一个判别函数，用来判断字典对象中相应的属性是否满足谓词函数中的条件。本篇阅读的代码片段来自于30-seconds-of-python。check_prop {代码...} check_prop函数接收一个谓词函数fn和属性字...

本篇阅读的代码实现了在给定的延迟时间后，调用指定函数的功能。 本篇阅读的代码片段来自于30-seconds-of-python。

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python模块超详细，小白必看！

  使用 python 的 importlib.import_module() 方法能够动态加载 py 脚本，并调用里面的方法，这个操作在某些时候非常管用，功能类似 py 脚本里的 import xxx、from xxx import xxx。

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