PyCharm 2018.1.2社区版更新后外部Python库自动补全失效求助

Hey there, let's work through this auto-completion problem you're having. First off, PyCharm Community Edition does support auto-completion for external Python libraries—so that's not the root cause here. Let's go through some troubleshooting steps that usually resolve this kind of glitch after an update:

• Clear PyCharm's cache and restart
  Corrupted cache is one of the most common culprits after updates. To fix this:

  1. Go to the top menu bar, click File → Invalidate Caches / Restart...
  2. Select Invalidate and Restart from the popup. Let PyCharm fully restart and reindex everything.

• Verify your Project Interpreter's library indexing
  Sometimes the interpreter's package list doesn't index properly after an update:

  1. Open PyCharm → Preferences (macOS-specific; use File → Settings on other systems)
  2. Navigate to Project: [Your Project Name] → Project Interpreter
  3. Check if the list of installed packages loads correctly. If any look grayed out or have warnings, click the refresh icon (circular arrow) at the top of the package list to force a reindex.

• Mark your project root as a Sources Root
  If PyCharm doesn't recognize your project's root directory, it might skip indexing external libraries tied to it:

  1. Right-click your project's root folder in the Project sidebar
  2. Hover over Mark Directory as → select Sources Root

• Double-check your interpreter path
  Updates sometimes reset the default interpreter. Make sure you're using the same one that runs your code:

  1. In Project Interpreter settings, click the gear icon next to the interpreter name → Show All
  2. Confirm the path matches the Python executable you use to run your scripts. If not, select the correct one or add it via the + button.

• Manually trigger a reindex
  If auto-indexing isn't kicking in:

  1. Go to File → Sync with File System
  2. Wait for PyCharm to sync files and finish indexing. You can also check the bottom status bar for indexing progress—if it's stuck, cancel it and let it restart.

• Test with a fresh project
  If the issue only happens in your current project, its configuration files might be corrupted:

  1. Create a new empty project, configure the same interpreter
  2. Install an external library (like requests) and test if auto-completion works. If it does, copy your original project files into this new one.

If none of these steps work, keep in mind that PyCharm 2018.1.2 is a fairly old version. While Community Edition supports auto-completion, there might be compatibility bugs with macOS High Sierra. If you're open to it, updating to a newer (still supported) Community Edition version could resolve the issue—but if you need to stick with 2018.1.2, try a clean reinstall of PyCharm to rule out installation corruption.

内容的提问来源于stack exchange，提问作者Damotorie