python代码入门篇

【Python零基础入门篇·18】：过滤执行代码写法、包的使用

import导入包时，首先执行_init_.py文件的代码不建议在init中写入python模块，尽量保证init内容简单创建一个包步骤：在项目文件下鼠标点击右键——>新建——>Python Package注意：给包命名，千万不要以模块的名字命名包的使用例子在包下...

一行代码都不加如何提升性能|Python从入门到精通：入门篇之二十一

第二十节：如何用一行代码让运行速度提高近10倍上节课我们讲了使用一行代码就把程序的运算性能提升了将近10倍，在文章末尾老师给大家留了个思考，怎么样能够使得程序的性能更加地优化呢？在讲授之前先给大家做下思想的引导。举个例子，还是...

【Python零基础入门篇·17】：模块、模块的使用、过滤执行代码写法、包的使用

模块模块：就是.py文件，里面定义了一些函数和变量，需要的时候就可以导入这些模块。执行步骤：在python模块加载路径中查找相应的模块文件。将模块文件编译成中间代码。执行模块文件中的代码。内置模块内置模块也叫标准库，比如random,time...

如何用一行代码让运行速度提高近10倍|Python从入门到精通：入门篇之二十

第十九节：循环终止之break和continue的用法求100以内的所有质数 i=2 while i(i)i+1 这是我们之前写过的一个质数练习的代码，执行结果显然是没有问题的。但是只追求结果是没有什么意义的，就比如，打印100以内的质数，为什么我们要使用...

【Python零基础入门篇·13】：模块、模块的使用、过滤执行代码写法、包的使用

import导入包时，首先执行_init_.py文件的代码不建议在init中写入python模块，尽量保证init内容简单1、创建一个包步骤：在项目文件下鼠标点击右键——>新建——>Python Package注意：给包命名，千万不要以模块的名字命名2、包的使用例子在...

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