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SOLVED: Import Pandas Could Not Be Resolved from Source Pylance (reportMissingModuleSource)

Description:

Encountering the "Import Pandas could not be resolved from source Pylance (reportMissingModuleSource)" error in Visual Studio Code can be frustrating. This issue occurs when the Pylance extension is unable to locate the Pandas module in your environment. Follow this detailed guide to resolve this error and get back to coding without interruptions.

*Step-by-Step Solution:*

*Step 1: Verify Pandas Installation*

Ensure that Pandas is installed in your Python environment.

1. Open a terminal or command prompt.
2. Run the following command to check if Pandas is installed:

```bash
pip show pandas
```

If Pandas is not installed, you need to install it:

```bash
pip install pandas
```

*Step 2: Select the Correct Python Interpreter in VS Code*

Ensure that VS Code is using the Python interpreter where Pandas is installed.

1. Open Visual Studio Code.
2. Press `Ctrl + Shift + P` (Windows/Linux) or `Cmd + Shift + P` (Mac) to open the Command Palette.
3. Type `Python: Select Interpreter` and select the interpreter that has Pandas installed.

*Step 3: Reload Visual Studio Code*

Sometimes, simply reloading VS Code can resolve the issue.

1. Press `Ctrl + Shift + P` (Windows/Linux) or `Cmd + Shift + P` (Mac) to open the Command Palette.
2. Type `Reload Window` and press `Enter`.

*Step 4: Configure Pylance Settings*

Make sure Pylance is configured to include the path where Pandas is installed.

1. Open the settings in Visual Studio Code by navigating to `File - Preferences - Settings` or pressing `Ctrl + ,`.
2. In the search bar, type `Pylance`.
3. Look for `Python - Analysis: Extra Paths` and add the path where Pandas is installed. The path is usually something like:

```json
"python.analysis.extraPaths": [
"path/to/your/python/site-packages"
]
```

4. To find the exact path, run the following command in the terminal:

```bash
python -c "import site; print(site.getsitepackages())"
```

*Step 5: Check Virtual Environment Activation*

If you are using a virtual environment, ensure it is activated.

1. Navigate to your project directory in the terminal.
2. Activate the virtual environment:

**Windows**:
```bash
.\venv\Scripts\activate
```

**Mac/Linux**:
```bash
source venv/bin/activate
```

3. Verify that Pandas is installed within this virtual environment. If not, install it using:

```bash
pip install pandas
```

*Step 6: Update VS Code and Extensions*

Ensure that Visual Studio Code and all extensions are up to date.

1. Go to the Extensions view in the sidebar, click on the gear icon next to each extension, and select `Check for Updates`.
2. Update VS Code by going to `Help - Check for Updates`.

*Step 7: Disable and Re-enable Pylance Extension*

1. Go to the Extensions view by clicking on the Extensions icon in the Activity Bar on the side of the window.
2. Search for Pylance, click on the extension, and select `Disable`.
3. After disabling, restart VS Code, then go back to the Extensions view and enable Pylance again.

*Step 8: Reinstall Pylance Extension*

If the issue persists, try reinstalling the Pylance extension.

1. Go to the Extensions view, search for Pylance, click on the extension, and select `Uninstall`.
2. After uninstalling, reinstall it from the Extensions view.

*Example Code to Verify:*

After following the above steps, create a new Python file in VS Code and add the following code to verify the import:

```python
import pandas as pd

print(pd.__version__)
```

Run the code by pressing `F5` or using the terminal. If everything is set up correctly, you should see the version of Pandas printed without any import errors.

*Conclusion:*

By following these steps, you should be able to resolve the "Import Pandas could not be resolved from source Pylance (reportMissingModuleSource)" error and continue with your development work without interruptions.

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