{
  "id": "python/fastapi-attribute-error-email-validator",
  "signature": "ImportError: email-validator is not installed, run `pip install pydantic[email]`",
  "signature_zh": "ImportError: 未安装 email-validator，请运行 `pip install pydantic[email]`",
  "regex": "ImportError:\\ email\\-validator\\ is\\ not\\ installed,\\ run\\ `pip\\ install\\ pydantic\\[email\\]`",
  "domain": "python",
  "category": "install_error",
  "subcategory": null,
  "root_cause": "A Pydantic model uses `EmailStr`, which requires the optional `email-validator` dependency.",
  "root_cause_type": "generic",
  "root_cause_zh": "Pydantic 模型使用了 `EmailStr`，它依赖可选的 `email-validator` 包。",
  "versions": [
    {
      "version": "2.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Loses email validation; invalid emails pass through to the DB.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Wrong package name; installs an unrelated module.",
      "fail_rate": 0.95,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.98,
      "how": "pip install 'pydantic[email]'",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.97,
      "how": "echo 'pydantic[email]' >> requirements.txt && pip install -r requirements.txt",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": null,
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.9,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-07-08",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}