Python import statement. ModuleNotFoundError: when running tests and referencing a module in a parent folder

Question

问题：如何修复测试文件中的导入语句？

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我运行以下命令：

命令运行启动测试

cd cluster_health
python -m pytest tests/ -v -s

然后我得到以下错误！

    ImportError while importing test module '<full path>...\cluster_health\tests\unit\test_handler.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
tests\unit\test_handler.py:5: in <module>
    from health_check import app
health_check\app.py:3: in <module>
    import my_elastic_search
E   ModuleNotFoundError: No module named 'my_elastic_search'

.\cluster_health\tests\unit\test_handler.py

import json
import sys
import pytest
import health_check
from health_check import app
from health_check import my_elastic_search
# from unittest.mock import patch
import mock
from mock import Mock

def test_lambda_handler(apigw_event, monkeypatch):
    CONN = Mock(return_value="banana")
    monkeypatch.setattr('health_check.my_elastic_search.connect', CONN)
    ret = app.lambda_handler(apigw_event, "")    
    # etc...

.\cluster_health\health_check\app.py

import json
import sys
import my_elastic_search

def lambda_handler(event, context):
    print(my_elastic_search.connect("myhost", "myuser", "mypass"))
    # etc

.\cluster_health\health_check\my_elastic_search.py

def connect(the_host, the_user, the_pass):
    return "You are connected!"

Answer 1

health_check 是文件夹的名称。在 Python 中导入时，您没有命名文件夹。您只需使用 import my_elastic_search。但是，这可能会导致找不到模块。您可以使用名为 'sys' 的模块来定义程序应该在何处搜索正在导入的模块，或者您可以将代码放在与模块相同的目录中。从文件导入特定函数时，您将使用 from 或从文件导入 class。

Answer 2

感谢 importing modules from parent folder 和@woofless（以上）这是我对问题的解决方案（问题陈述实际上是我在父目录中引用模块。AWS 工具包的脚手架 Visual Studio 与 SAM 不提供适当的代码来充分引用其他父模块）！

注意下面的sys.path.insert。此外，根据@woofless，我简化了名称空间引用，使其不引用根文件夹 "health_check"。瞧！

.\cluster_health\tests\unit\test_handler.py

import sys, os, inspect
currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
parentdir = os.path.dirname(currentdir)
parentdir = "%s\health_check"%os.path.dirname(parentdir)
sys.path.insert(0,parentdir)
print(parentdir)

import json

import pytest
import health_check
import app
import my_elastic_search

Python import statement. ModuleNotFoundError: when running tests and referencing a module in a parent folder

Python import statement. ModuleNotFoundError: when running tests and referencing a module in a parent folder

python-3.x

aws-lambda

aws-sam-cli

aws-sam

aws-toolkit