How to Fix PyLint\'s \"Unable to Import\" Error When Importing Modules from Sub-directories?

Resolving PyLint's "Unable to Import" Error: A Python Path Conundrum

When utilizing PyLint within Wing IDE on Windows, users may encounter an error stating, "Unable to import." This issue arises when importing modules from sub-directories within a project. For example, consider the following project structure:

__init__.py
myapp.py
one.py
subdir/
    __init__.py
    two.py

In this scenario, when attempting to import "one" from "two.py," PyLint may throw an error, even though it functions correctly at runtime. This occurs because the project's top-level directory is not included in PyLint's search path.

Option 1: Modifying PYTHONPATH

One solution involves modifying the PYTHONPATH environment variable to include the directory above the module you're attempting to import. This can be achieved through your system's settings or command line.

Option 2: Customizing .pylintrc

Alternatively, you can edit the .pylintrc file to include the requisite directory. Specifically, look for the [MASTER] section (or [General] in older versions of PyLint) and add the following code:

init-hook='import sys; sys.path.append("/path/to/root")'

Replace "/path/to/root" with the absolute path to the directory above your module.

Both of these approaches should resolve the "Unable to import" error in PyLint, allowing you to conduct your code analysis.

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