https://errorvault.dev/tags/modules/Recent content in Modules on ErrorVault — Developer Error Code DictionaryHugoen-usMon, 13 Apr 2026 14:23:58 +0800https://errorvault.dev/python/python-importerror-module-import-failure/Mon, 13 Apr 2026 14:23:58 +0800https://errorvault.dev/python/python-importerror-module-import-failure/<h2 id="1-symptoms">1. Symptoms</h2> <p>The <code>ImportError</code> in Python manifests as a runtime exception when the interpreter fails to load a requested module. Common symptoms include:</p> <ul> <li>Traceback ending with <code>ImportError: No module named 'module_name'</code>.</li> <li>In Python 3.6+, <code>ModuleNotFoundError</code> (a subclass) for missing modules, but <code>ImportError</code> for issues like failed dynamic loads or circular imports.</li> <li>Script halts immediately upon <code>import</code> statement execution.</li> <li>IDEs like VS Code or PyCharm highlight unresolved imports in red.</li> <li><code>pip list</code> or <code>conda list</code> shows the module absent from the environment.</li> </ul> <p>Example traceback:</p>