[英]Why can't Main Module see sub-module inside it?
I am editing to minimize to a reproducible example:我正在编辑以最小化为可重现的示例:
Contents of cal.py cal.py 的内容
import M1
M1.SM1.nice_hello.hello()
Directory structure:目录结构:
M1/
├── __init__.py
└── SM1
├── __init__.py
└── nice_hello.py
Contents of SM1/nice_hello.py: SM1/nice_hello.py 的内容:
def hello():
print(f'Hello my friend!!!')
All other files ( init .py files) are empty.所有其他文件( init .py 文件)都是空的。
To run cal.py:要运行 cal.py:
export PYTHONPATH=/PATH/TO/M1 ; python cal.py
But that gives me following error:但这给了我以下错误:
Traceback (most recent call last):
File "cal.py", line 3, in <module>
M1.SM1.nice_hello.hello()
AttributeError: module 'M1' has no attribute 'SM1'
It should work if you import the whole module name, ie in the file cal.py
如果您导入整个模块名称,即在文件
cal.py
中,它应该可以工作
import M1.SM1.nice_hello
M1.SM1.nice_hello.hello()
Submodules are not imported recursively, if you want that to happen you can do the below: -子模块不会以递归方式导入,如果您希望这样做,您可以执行以下操作:-
A) Create init .py file inside M1 module ( I think you already have that ) A)在 M1 模块中创建init .py 文件(我想你已经有了)
B) Have the below code in your init .py file: - B)在您的init .py 文件中有以下代码:-
import importlib
import pkgutil
def import_submodules(package, recursive=True):
""" Import all submodules of a module, recursively, including subpackages
:param package: package (name or actual module)
:type package: str | module
:rtype: dict[str, types.ModuleType]
"""
if isinstance(package, str):
package = importlib.import_module(package)
results = {}
for loader, name, is_pkg in pkgutil.walk_packages(package.__path__):
full_name = package.__name__ + '.' + name
results[full_name] = importlib.import_module(full_name)
if recursive and is_pkg:
results.update(import_submodules(full_name))
return results
This will help you import all the submodules inside that package ( M1)这将帮助您导入 package ( M1 ) 中的所有子模块
Now in your cal.py do below: -现在在您的 cal.py 中执行以下操作:-
import M1
M1.import_submodules(M1)
def hello():
print(f'Hello my friend!!!')
Hopefully this will resolve your issue and might guide you on how to import modules recursively in python希望这能解决您的问题,并可能指导您如何在 python 中递归地导入模块
Reference:- How to import all submodules?参考:- 如何导入所有子模块?
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