Python 的核心哲学,被称为 Python 的禅,在 PEP-20 中有解释,可以在https://www.python.org/dev/peps/pep-0020找到。 它是20 个软件原则的集合,如下所示: 漂亮总比难看好。 显性比隐性好。 简单比复杂好。 复杂总比复杂好。 平面比嵌套好。 疏比密好。 可读性很重要。 特例不足以特殊到打破规则。 实用...
sys模块(* * *) 1sys.argv 命令行参数List,第一个元素是程序本身路径2sys.exit(n) 退出程序,正常退出时exit(0)3sys.version 获取Python解释程序的版本信息4sys.maxint 最大的Int值5sys.path 返回模块的搜索路径,初始化时使用PYTHONPATH环境变量的值6sys.platform 返回操作系统平台名称 进度条: importsys,time...
Learn how to use Python's if __name__ == "__main__" idiom to control code execution. Discover its purpose, mechanics, best practices, and when to use or avoid it. This tutorial explores its role in managing script behavior and module imports for clean an
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sys.modules包含了当前所load的所有的modules的dict(其中包含了builtin的modules) 显式相对导入和隐式相对导入 Python相对导入与绝对导入,这两个概念是相对于包内导入而言的。包内导入即是包内的模块导入包内部的模块。 模块搜索路径 sys.path是python的搜索模块的路径集,是一个list ...
This variable holds a list of strings that specifies Python’s search path for modules. To add a new item to sys.path, you can use .insert(). For this example to work, you need to change the placeholder path and pass the path to hello.zip on your file system. Once your importable ...
For test discovery all test modules must be importable from the top level directory of the project. 测试发现 unittest支持非常简单的测试发现。为了兼容测试发现,所有的测试文件(test_xxx.py)必须是可从项目的顶级目录导入的模块或包。测试发现由TestLoader.discover()实现,但是可以通过命令行使用,基本的用法如下...
Python is the main dynamic language used at Google. This style guide is a list ofdos and don’tsfor Python programs. To help you format code correctly, we’ve created asettings file for Vim. For Emacs, the default settings should be fine. ...
Python 2 modules can be distributed using Flit, but need to be importable on Python 3 without errors. Usage Say you're writing a modulefoobar— either as a single filefoobar.py, or as a directory — and you want to distribute it. ...
Return a list containing all global site-packages directories. 3.2 新版功能. site.getuserbase() Return the path of the user base directory, USER_BASE. If it is not initialized yet, this function will also set it, respecting PYTHONUSERBASE. 3.2 新版功能. site.getusersitepackages() Return th...