karaoke.py 当引用这个package的时候,Python会在sys.path上搜索子路径,所以需要将某个目录当成package的话,__init__.py是必须要有的,就是一个placeholder,不过也可以有代码。 refers to docs online:http://docs.python.org/2/tutorial/modules.html#packages[good docs explanation]...
no need to install built-in packages before you can import and use them in Python. These packages are part of Python's standard library, which is included with the Python installation. When you write Python code that imports a built-in package, Python will automatically find and use the pac...
'/Users/crady/.local/share/virtualenvs/import-Wz4V_n6l/lib/python3.12/site-packages'] 可以看到/a/b/c这个路径,已经被加到了sys.path中。 于是,在import mymath时python就可以从这些路径里去找mymath.py文件了。如果找到了皆大欢喜,但如果找不到,python就会寻找叫做mymath的目录。mymath目录中往往还会...
% python3 -m package_A.module_a/Users/slz/dev/src/digolds_sample/packages/Library/Frameworks/Python.framework/Versions/3.8/lib/python38.zip/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/lib-dynload/Users/slz/Libra...
所有subpkg的__init__.py仅写入__path__ = __import__('pkgutil').extend_path(__path__, __name__). the legacy behavior is to add any other regular packages on the searched path to its__path__. But in Python 3.3 and later, it also adds namespace packages. ...
['','C:\\Users\\john\\Documents\\Python\\doc','C:\\Python36\\Lib\\idlelib','C:\\Python36\\python36.zip','C:\\Python36\\DLLs','C:\\Python36\\lib','C:\\Python36','C:\\Python36\\lib\\site-packages'] 这些搜索路径会保存在 sys.path 里面,可以通过上面的方式获得。
Python 定义了两种类型的包,即 常规包(regular packages) 和 命名空间包(namespace packages)。常规包是存在于 Python 3.2 及更早版本中的传统包。常规包即包含 __init__.py 文件的目录。当导入一个常规包时,__init__.py 文件被隐式执行,而且它定义的对象被绑定到包命名空间中的名称。 __init__.py 文件...
>>> sys.path.append('/usr/lib/python2.6/site-packages/requests-2.3.0-py2.6.egg') >>> import requests >>>
其实,上面使用升级命令无反应,只要在 py 后面加上 python 版本号就可以了。 D:\WindowsSoftware\Python3.10.2\Scripts>py -3.10 -m pip install --upgrade pip Requirement already satisfied: pip in d:\windowssoftware\python3.10.2\lib\site-packages (21.2.4) ...
['C:\\Users\\***\\AppData\\Local\\Programs\\Python\\Python38\\lib\\site-packages\\getkey']Traceback(most recent call last):File"c:/Users/***/PycharmProjects/Test/test.py",line5,in<module>print(os.__path__)AttributeError:module'os'has no attribute'__path__' ...