LocalStack导入报错：No module named 'localstack.mock'求助

安全阿岳

2026-5-29

Fixing ModuleNotFoundError: No module named 'localstack.mock' in LocalStack

Hey there, I've run into this exact issue before with LocalStack's shifting module structure—let's get you sorted out!

Why this error happens

The localstack.mock module was deprecated and removed in newer versions of LocalStack (including the 0.8.x releases you're using). It looks like the README you're referencing might be from an older branch or tag that hasn't been updated to match the current package structure.

Step-by-step solutions

Use the updated import path for 0.8.x versions
Instead of importing from localstack.mock, use the core localstack module directly. If you're trying to spin up the infrastructure stack, the correct import now is:
```
from localstack import infra
```
You can then start the infrastructure with:
```
infra.start_infra()
```
Match your README version to your installed package
Double-check that you're viewing the README for the exact version you installed (0.8.3 or 0.8.6.1). On GitHub, you can switch to the corresponding tag (e.g., v0.8.6.1) to see the documentation that aligns with your LocalStack release—this will avoid confusion from outdated main-branch docs.
Opt for CLI over code imports (recommended)
For most use cases, LocalStack recommends using the official CLI instead of code-based infrastructure startup. Just run this command in your terminal:
```
localstack start
```
This is more reliable and aligns with the latest best practices.
Downgrade only if absolutely necessary
If you must use the old localstack.mock module (not recommended, as it's unsupported), you'll need to install an older LocalStack version (pre-0.8.x, like 0.7.12). You can do this with:
```
pip install localstack==0.7.12
```
Keep in mind this version lacks many fixes and features from newer releases.