A Python module which can contain submodules or recursively, subpackages. Technically, a package is a Python module with apathattribute. 是一个Module(一个包含__path__属性的Module) 包含其他子Module和子Package Package 又分为: 常规包(regular package):也叫传统包(traditional package),比如,包含__ini...
• fromlist (Optional): 被导入的 submodule 名称 • level (Optional): 导入路径选项,Python 2 中默认为 -1,表示同时支持 absolute import 和 relative import。Python 3 中默认为 0,表示仅支持 absolute import。如果大于 0,则表示相对导入的父目录的级数,即 1 类似于 ‘.’,2 类似于 ‘..’。 1....
# can be loaded with default Python-machinery # because the resulting extension is called `bootstrap`: from . import bootstrap # injecting our finders into sys.meta_path # after that all other submodules can be loaded bootstrap.bootstrap_cython_submodules() 1. 2. 3. 4. 5. 6. 7. 8...
Conditional import: if condition: import module_name This allows you to conditionally import a module based on a certain condition. The "import" will occur only if the condition is true. Import submodules: import package_name.module_name If a module is part of a package (i.e., it is in...
fromlist (Optional): 被导入的 submodule 名称 level (Optional): 导入路径选项,Python 2 中默认为 -1,表示同时支持 absolute import 和 relative import。Python 3 中默认为 0,表示仅支持 absolute import。如果大于 0,则表示相对导入的父目录的级数,即 1 类似于 ‘.’,2 类似于 ‘..’。 使用示例: # ...
30self._objects = {}ifextra_objectsisNoneelseextra_objects31self._name =name32self._import_structure =import_structure3334#Needed for autocompletion in an IDE35def__dir__(self):36result = super().__dir__()37#The elements of self.__all__ that are submodules may or may not be in ...
Submodules When a submodule is loaded using any mechanism (e.g.importlibAPIs, theimportorimport-fromstatements, or built-in__import__()) a binding is placed in the parent module’s namespace to the submodule object. For example, if packagespamhas a submodulefoo, after importingspam.foo,spa...
fromlist - objects or submodules that should be imported by name level - specifies whether to use absolute or relative imports Use of __import__() is Discouraged This __import__() function is not necessary for everyday Python program. It is rarely used and often discouraged. This function...
Python >>> import math >>> math.__dict__["pi"] 3.141592653589793 Copied! You rarely need to interact with .__dict__ directly. Similarly, Python’s global namespace is also a dictionary. You can access it through globals(). It’s fairly common to import subpackages and submodules in...
It is not set on all modules (e.g. built-in modules). __path__ The list of locations where the package's submodules will be found. Most of the time this is a single directory. The import system passes this attribute to __import__() and to finders in the same way as sys.path...