在Celery任務中動態導入模塊

例如，我有一個名爲hello.py模塊在我的工作目錄：

$ cat hello.py 
def run(): 
    print('hello world')

我可以importlib動態導入：

$ python3 
Python 3.5.2 (default, Jul 5 2016, 12:43:10) 
[GCC 5.4.0 20160609] on linux 
Type "help", "copyright", "credits" or "license" for more information. 
>>> import importlib 
>>> p = importlib.import_module('hello') 
>>> p.run() 
hello world

我想做的事情上面一樣從芹菜任務：

@celery.task() 
def exec_module(module, args={}): 
    print('celery task running: %s' % (module)) 
    print(args) 
    print(os.getcwd()) 
    print(os.listdir()) 

    module = importlib.import_module('hello') 
    module.run()

我收到以下錯誤或者當任務運行：從print(os.listdir())（在上面的調試輸出線6）的輸出

[2016-09-11 17:51:48,132: WARNING/MainProcess] [email protected] ready. 
[2016-09-11 17:52:05,516: INFO/MainProcess] Received task: web.tasks.exec_module[f24e3d03-5a17-41dc-afa9-541c99b60a35] 
[2016-09-11 17:52:05,518: WARNING/Worker-1] celery task running: example_module 
[2016-09-11 17:52:05,518: WARNING/Worker-1] {'example_file': '/tmp/tmpo4ks9ql0.xml', 'example_string': 'asd'} 
[2016-09-11 17:52:05,518: WARNING/Worker-1] /home/user/Learning/vision-boilerplate 
[2016-09-11 17:52:05,518: WARNING/Worker-1] ['run.py', 'requirements.txt', 'gulpfile.js', 'tsconfig.json', 'typings.json', 'package.json', 'vision_modules', 'typings', 'web', 'config', 'hello.py', 'docker-compose.yml', 'ng', 'node_modules', 'Dockerfile'] 
[2016-09-11 17:52:05,523: ERROR/MainProcess] Task web.tasks.exec_module[f24e3d03-5a17-41dc-afa9-541c99b60a35] raised unexpected: ImportError("No module named 'hello'",) 
Traceback (most recent call last): 
    File "/usr/local/lib/python3.5/dist-packages/celery/app/trace.py", line 240, in trace_task 
    R = retval = fun(*args, **kwargs) 
    File "/home/user/Learning/vision-boilerplate/web/__init__.py", line 21, in __call__ 
    return TaskBase.__call__(self, *args, **kwargs) 
    File "/usr/local/lib/python3.5/dist-packages/celery/app/trace.py", line 438, in __protected_call__ 
    return self.run(*args, **kwargs) 
    File "/home/user/Learning/vision-boilerplate/web/tasks.py", line 19, in exec_module 
    module = importlib.import_module('hello') 
    File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module 
    return _bootstrap._gcd_import(name[level:], package, level) 
    File "<frozen importlib._bootstrap>", line 986, in _gcd_import 
    File "<frozen importlib._bootstrap>", line 969, in _find_and_load 
    File "<frozen importlib._bootstrap>", line 956, in _find_and_load_unlocked 
ImportError: No module named 'hello'

請注意，我們是絕對正確的目錄和hello.py就在那裏。

是否可以從Celery任務中動態導入模塊？

來源

2016-09-11 Juicy

是否可以在Celery任務中動態導入模塊？

是的。因爲我已經做到了。當模塊是單個模塊而不屬於任何軟件包時，應該將模塊的目錄添加到sys路徑中。

sys.path.append（ '模塊的路徑'）

例如：

import importlib 
import os 
import sys 
import celery 
from demo import celeryconfig 

# add your path to the sys path 
sys.path.append(os.getcwd()) 

app = celery.Celery('tasks',) 
app.config_from_object(celeryconfig) 


@celery.task() 
def exec_module(module, args={}): 
    print('celery task running: %s' % (module)) 
    print(args) 
    print(os.getcwd()) 
    print(os.listdir()) 

    module = importlib.import_module('hello') 
    module.run()

我希望這將是對你有幫助。謝謝

來源

2016-09-13 08:59:34

在Celery任務中動態導入模塊

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