How do I fix PyDev "Undefined variable from import" errors?
code-analysis, pydev, python
Solution
For code in your project, the only way is adding a declaration saying that you expected that -- possibly protected by an `if False` so that it doesn't execute (the static code-analysis only sees what you see, not runtime info -- if you opened that module yourself, you'd have no indication that main was expected).
To overcome this there are some choices:
If it is some external module, it's possible to add it to the `forced builtins` so that PyDev spawns a shell for it to obtain runtime information (see http://pydev.org/manual_101_interpreter.html for details) -- i.e.: mostly, PyDev will import the module in a shell and do a `dir(module)` and `dir` on the classes found in the module to present completions and make code analysis.
You can use Ctrl+1 (Cmd+1 for Mac) in a line with an error and PyDev will present you an option to add a comment to ignore that error.
It's possible to create a `stub` module and add it to the `predefined` completions (http://pydev.org/manual_101_interpreter.html also has details on that).
Problem
I've got a Python project using PyDev in Eclipse, and PyDev keeps generating false errors for my code. I have a module `settings` that defines a `settings` object. I import that in module `b` and assign an attribute with: ``` from settings import settings settings.main = object() ``` In some of my code--but not all of it, statements like: ``` from settings import settings print settings.main ``` ... generate "Undefined variable from import: main" messages in the Eclipse code error pane, even though the code runs without a problem. How can I correct these?