title: Import "matplotlib" could not be resolved from source Pylance(reportMissingModuleSource)
body: <p>whenever I try to import matplotlib or matplotlib.pyplot in VS Code I get the error in the title:</p>
  <pre><code>Import &quot;matplotlib&quot; could not be resolved from source Pylance(reportMissingModuleSource)
  </code></pre>
  <p>or</p>
  <pre><code>Import &quot;matplotlib.pyplot&quot; could not be resolved from source Pylance(reportMissingModuleSource)
  </code></pre>
  <p>The hyperlink of the reportMissingModuleSource sends me to <a href="https://github.com/microsoft/pylance-release/blob/main/DIAGNOSTIC_SEVERITY_RULES.md#diagnostic-severity-rules" rel="noreferrer">https://github.com/microsoft/pylance-release/blob/main/DIAGNOSTIC_SEVERITY_RULES.md#diagnostic-severity-rules</a>, where it says:<br />
  <em>&quot;Diagnostics for imports that have no corresponding source file. This happens when a type stub is found, but the module source file was not found, indicating that the code may fail at runtime when using this execution environment. Type checking will be done using the type stub.&quot;</em><br />
  However, from the explanation I don't understand exactly what's wrong and what I should do to fix this, can someone help me with this?</p>