How to Fix Pydev "Undefined Variable from Import" Errors

How do I fix PyDev Undefined variable from import errors?

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:

1. 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.

2. 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.

3. 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).

Undefined variable from import when importing numpy in eclipse pydev

The LD_LIBRARY_PATH has to contain paths to the MKL libraries. Even if LD_LIBRARY_PATH is set properly, it has to be explicitly specifed in Eclipse under Window > Preferences > Interpreter - Python, under the "Environment" tab on the right hand side. Add a new variable called "LD_LIBRARY_PATH" and paste the content of $LD_LIBRARY_PATH.

Once it is done, errors will only disappear from your code if a line is added to the code which uses a numpy object so that imports are checked again.

PyDev displays undefined variable from import for 1 out of 2 vars

A solution that I found to be reasonable is to suppress this type of error in PyDev altogether. I know this is not perfect, but far and away the best one I've come across.

How to change this setting:

PyDev and pygame: Undefined Variable From Import Errors

Have you tried adding pygame to the Forced Builtins?

You can find more information on how to do that and why this may fix your issue at: http://www.pydev.org/manual_101_interpreter.html#PyDevInterpreterConfiguration-ForcedBuiltins

PyDev says Undefined variable from import: AF_INET

The socket module information is usually loaded in a spawned python process and its contents sent to Eclipse... Sometimes this doesn't work and the usual culprit is that to get this info, a socket connection is made and this doesn't work properly.

The following faq entry: https://www.pydev.org/faq.html#HowToFixCodeCompletion has more information. Please see if you can fix it with that info (if you can't, please provide any error you have in your error log).

code works,but pydev show 'Undefined variable from import: ',and completion doesn't work

Have you tried putting cv2 in the forced builtins?

See http://www.pydev.org/manual_101_interpreter.html (look for Forced Builtins in that page for more details on why this may be needed).

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