LeanDojo 是一个强大的 Python 库,将机器学习与 Lean 定理证明结合。它提供:
- 数据提取: 从 Lean 仓库提取证明状态、战术、前提等
- 程序化交互: 用 Python 代码控制 Lean
⚠️ 注意: 原始 LeanDojo 已弃用,建议使用 LeanDojo-v2
我们的整合架构:
┌─────────────────────────────────────────────────┐
│ 用户界面 (Leantime) │
├─────────────────────────────────────────────────┤
│ │
│ YC-Killer AI 代理 │
│ ├── 敏捷教练 Agent │
│ ├── 项目经理 Agent │
│ ├── 代码审查 Agent ←── LeanDojo 集成点 │
│ ├── 风险分析 Agent │
│ └── 证明助手 Agent ←── LeanDojo 核心功能 │
│ │
├─────────────────────────────────────────────────┤
│ Lean4 验证层 │
│ ├── 定理证明 │
│ ├── 代码验证 │
│ └── AI 辅助证明 ←── LeanDojo 数据提取 │
│ │
└─────────────────────────────────────────────────┘
| 功能 | 描述 | 我们的应用 |
|---|---|---|
| 数据提取 | 从 Lean 提取证明数据 | 训练 AI 模型 |
| 战术预测 | AI 预测下一步战术 | 证明助手 |
| 前提检索 | 搜索相关引理 | 自动化证明 |
| 程序化控制 | Python 控制 Lean | 自动化验证 |
pip install lean-dojogit clone https://github.com/lean-dojo/LeanDojo.git
cd LeanDojo
pip install .# 1. Git >= 2.25
git --version
# 2. Python 3.9-3.12
python --version
# 3. elan(已安装)
lean --version
# 4. wget
wget --version
# 5. GitHub Token(用于访问私有仓库)
export GITHUB_ACCESS_TOKEN=your_token_herefrom lean_dojo import LeanGitRepo, trace, Pos
# 定位到 mathlib4 仓库
repo = LeanGitRepo("https://github.com/leanprover-community/mathlib4", "master")
# 定位一个定理
theorem_path = "Mathlib/Data/Nat/Basic.lean"
theorem_pos = Pos(line=100, column=0) # 行号和列号
# 追踪证明
traced_theorem = trace(repo, theorem_path, theorem_pos)
# 获取证明状态
for tactic in traced_theorem.tactics:
print(f"战术: {tactic.text}")
print(f"状态: {tactic.state_before} → {tactic.state_after}")# leandojo_bridge.py
from lean_dojo import LeanGitRepo, trace, Pos, LeanFile
from typing import List, Dict, Optional
import os
class LeanDojoBridge:
"""LeanDojo 与我们的项目集成"""
def __init__(self, project_path: str):
self.project_path = project_path
self.repo = None
def load_project(self):
"""加载 Lean 项目"""
# 如果是本地项目
if os.path.isdir(self.project_path):
self.repo = LeanGitRepo(self.project_path)
# 如果是 GitHub 仓库
else:
self.repo = LeanGitRepo(self.project_path, "main")
def extract_theorem_data(self, file_path: str, line: int) -> Dict:
"""
提取定理数据
Args:
file_path: Lean 文件路径
line: 定理所在行号
Returns:
定理数据字典
"""
pos = Pos(line=line, column=0)
traced = trace(self.repo, file_path, pos)
return {
'theorem': traced.theorem_name,
'tactics': [
{
'text': t.text,
'state_before': str(t.state_before),
'state_after': str(t.state_after)
}
for t in traced.tactics
],
'premises': traced.premises
}
def suggest_tactics(self, proof_state: str) -> List[str]:
"""
基于当前证明状态建议战术
Args:
proof_state: 当前证明状态
Returns:
建议的战术列表
"""
# 这里可以集成机器学习模型
# 简化版本:基于规则的建议
suggestions = []
# 常用战术模式匹配
if "⊢ True" in proof_state:
suggestions.append("trivial")
elif "⊢ False" in proof_state:
suggestions.append("contradiction")
elif "∧" in proof_state:
suggestions.append("constructor")
elif "∃" in proof_state:
suggestions.append("use")
elif "∀" in proof_state:
suggestions.append("intro")
elif "→" in proof_state:
suggestions.append("intro")
# 通用建议
suggestions.extend(["simp", "ring", "omega", "decide"])
return suggestions
def verify_with_ai(self, code: str) -> Dict:
"""
使用 AI 辅助验证 Lean 代码
Args:
code: Lean 代码
Returns:
验证结果和建议
"""
# 1. 解析代码
# 2. 提取证明状态
# 3. AI 建议
# 4. 返回结果
return {
'verified': True, # 实际需要运行 Lean
'suggestions': self.suggest_tactics(code),
'ai_hints': "尝试使用 simp 或 ring 战术"
}
class AIProofAssistant:
"""AI 证明助手(基于 LeanDojo)"""
def __init__(self, leandojo_bridge: LeanDojoBridge):
self.bridge = leandojo_bridge
def assist_proof(self, theorem: str, current_state: str) -> Dict:
"""
协助证明定理
Args:
theorem: 定理名称
current_state: 当前证明状态
Returns:
证明建议
"""
# 1. 分析当前状态
suggestions = self.bridge.suggest_tactics(current_state)
# 2. 搜索相关引理
related_lemmas = self.search_related_lemmas(theorem)
# 3. 生成证明策略
strategy = self.generate_strategy(current_state)
return {
'suggested_tactics': suggestions,
'related_lemmas': related_lemmas,
'proof_strategy': strategy,
'confidence': 0.85 # AI 置信度
}
def search_related_lemmas(self, theorem: str) -> List[str]:
"""搜索相关引理"""
# 简化实现
return [
f"相关引理 1: Nat.add_comm",
f"相关引理 2: Nat.add_assoc",
f"相关引理 3: Nat.mul_comm"
]
def generate_strategy(self, proof_state: str) -> str:
"""生成证明策略"""
if "∀" in proof_state:
return "建议策略:使用 intro 引入假设,然后逐步证明目标"
elif "∃" in proof_state:
return "建议策略:使用 use 提供存在性证人"
elif "∧" in proof_state:
return "建议策略:使用 constructor 分解合取"
else:
return "建议策略:尝试 simp, ring, 或 omega"
# 使用示例
if __name__ == "__main__":
# 初始化
bridge = LeanDojoBridge("/mnt/c/workspace/math/lean4ai/YC-Killer-Lean4")
bridge.load_project()
assistant = AIProofAssistant(bridge)
# 模拟证明状态
current_state = "n : Nat\n⊢ n + 0 = n"
# 获取 AI 协助
result = assistant.assist_proof(
theorem="add_zero",
current_state=current_state
)
print("=== AI 证明助手 ===")
print(f"\n建议战术:")
for tactic in result['suggested_tactics']:
print(f" - {tactic}")
print(f"\n相关引理:")
for lemma in result['related_lemmas']:
print(f" - {lemma}")
print(f"\n证明策略:")
print(f" {result['proof_strategy']}")
print(f"\nAI 置信度: {result['confidence']*100:.0f}%")from lean_dojo import LeanGitRepo, trace
from typing import List, Dict
import json
def extract_training_data(repo_url: str, files: List[str]) -> List[Dict]:
"""
从 Lean 仓库提取训练数据
Args:
repo_url: 仓库 URL
files: 要提取的文件列表
Returns:
训练数据列表
"""
repo = LeanGitRepo(repo_url, "main")
training_data = []
for file_path in files:
try:
traced = trace(repo, file_path)
for theorem in traced.theorems:
data = {
'theorem': theorem.name,
'file': file_path,
'tactics': [
{
'text': t.text,
'state': str(t.state_before)
}
for t in theorem.tactics
]
}
training_data.append(data)
except Exception as e:
print(f"Error processing {file_path}: {e}")
return training_data
# 使用示例
if __name__ == "__main__":
files = [
"Mathlib/Data/Nat/Basic.lean",
"Mathlib/Data/List/Basic.lean",
"Mathlib/Algebra/Group/Defs.lean"
]
data = extract_training_data(
"https://github.com/leanprover-community/mathlib4",
files
)
# 保存为 JSON
with open("training_data.json", "w") as f:
json.dump(data, f, indent=2)
print(f"提取了 {len(data)} 个定理的训练数据")from lean_dojo import LeanGitRepo, trace
from typing import List, Tuple, Optional
import heapq
class ProofSearch:
"""证明搜索算法"""
def __init__(self, repo: LeanGitRepo):
self.repo = repo
def best_first_search(
self,
initial_state: str,
max_depth: int = 10,
beam_width: int = 5
) -> Optional[List[str]]:
"""
最佳优先搜索证明
Args:
initial_state: 初始证明状态
max_depth: 最大搜索深度
beam_width: beam 宽度
Returns:
证明步骤列表(如果找到)
"""
# 简化实现:beam search
beam = [(0, initial_state, [])] # (score, state, proof_steps)
for depth in range(max_depth):
candidates = []
for score, state, steps in beam:
# 生成候选战术
tactics = self.generate_tactics(state)
for tactic in tactics:
new_state = self.apply_tactic(state, tactic)
new_score = self.evaluate_state(new_state)
new_steps = steps + [tactic]
# 如果找到证明
if self.is_proof_complete(new_state):
return new_steps
candidates.append((new_score, new_state, new_steps))
# 选择 top-k
beam = heapq.nsmallest(beam_width, candidates)
return None # 未找到证明
def generate_tactics(self, state: str) -> List[str]:
"""生成候选战术"""
tactics = ["simp", "ring", "omega", "decide", "trivial"]
if "∀" in state:
tactics.append("intro")
if "∃" in state:
tactics.append("use")
if "∧" in state:
tactics.append("constructor")
return tactics
def apply_tactic(self, state: str, tactic: str) -> str:
"""应用战术(简化实现)"""
# 实际需要与 Lean 交互
return f"Applied {tactic} to {state}"
def evaluate_state(self, state: str) -> float:
"""评估状态(越低越好)"""
# 简化:基于目标数量
goal_count = state.count("⊢")
return goal_count
def is_proof_complete(self, state: str) -> bool:
"""检查证明是否完成"""
return "⊢" not in state or state.strip() == ""# yc_killer_leandojo_agent.py
from leandojo_bridge import LeanDojoBridge, AIProofAssistant
from typing import Dict, List
class YCKillerLeanDojoAgent:
"""YC-Killer + LeanDojo AI 代理"""
def __init__(self, project_path: str):
self.bridge = LeanDojoBridge(project_path)
self.proof_assistant = AIProofAssistant(self.bridge)
def assist_developer(self, context: Dict) -> Dict:
"""
协助开发者
Args:
context: 包含当前代码、证明状态等
Returns:
协助建议
"""
code = context.get('code', '')
proof_state = context.get('proof_state', '')
# 1. 分析代码
analysis = self.analyze_code(code)
# 2. AI 证明建议
proof_help = self.proof_assistant.assist_proof(
theorem=context.get('theorem', ''),
current_state=proof_state
)
# 3. 生成解释
explanation = self.generate_explanation(proof_help)
return {
'analysis': analysis,
'proof_suggestions': proof_help,
'explanation': explanation,
'next_steps': proof_help['suggested_tactics']
}
def analyze_code(self, code: str) -> Dict:
"""分析 Lean 代码"""
return {
'has_sorry': 'sorry' in code,
'theorem_count': code.count('theorem'),
'definition_count': code.count('def'),
'lines': len(code.split('\n'))
}
def generate_explanation(self, proof_help: Dict) -> str:
"""生成人类可读的解释"""
tactics = proof_help['suggested_tactics']
strategy = proof_help['proof_strategy']
explanation = f"""
基于当前的证明状态,我建议以下步骤:
1. **推荐战术**: {', '.join(tactics[:3])}
2. **证明策略**: {strategy}
3. **相关引理**: 可以查看以下引理以获得灵感:
- {', '.join(proof_help['related_lemmas'][:2])}
4. **AI 置信度**: {proof_help['confidence']*100:.0f}%
提示:尝试第一个建议的战术,如果不成功,继续尝试下一个。
"""
return explanation
def auto_complete_proof(self, partial_proof: str) -> str:
"""
自动补全证明
Args:
partial_proof: 部分证明代码
Returns:
补全后的证明
"""
# 简化实现:添加常用战术
suggestions = [
"\n · simp",
"\n · ring",
"\n · omega",
"\n · exact",
"\n · constructor"
]
completed = partial_proof
for suggestion in suggestions[:2]:
completed += suggestion
completed += "\n · sorry -- 请手动完成"
return completed
# 使用示例
if __name__ == "__main__":
agent = YCKillerLeanDojoAgent("/mnt/c/workspace/math/lean4ai/YC-Killer-Lean4")
# 模拟开发者上下文
context = {
'code': """
theorem add_comm (a b : Nat) : a + b = b + a := by
-- 开发者卡在这里
sorry
""",
'proof_state': "a b : Nat\n⊢ a + b = b + a",
'theorem': 'add_comm'
}
# 获取协助
result = agent.assist_developer(context)
print("=== YC-Killer LeanDojo Agent ===\n")
print("代码分析:")
for key, value in result['analysis'].items():
print(f" - {key}: {value}")
print("\n" + result['explanation'])
print("\n下一步:")
for step in result['next_steps'][:3]:
print(f" - {step}")- LeanDojo 网站: https://leandojo.org
- LeanDojo-v2: https://github.com/lean-dojo/LeanDojo-v2
- 文档: https://leandojo.readthedocs.io
- Demo: https://github.com/lean-dojo/LeanDojo/blob/main/scripts/demo-lean4.ipynb
- ReProver: 检索增强的证明器
- LeanCopilot: Lean 的 LLM 副驾驶
- LeanDojo Benchmark: 定理证明数据集
@inproceedings{yang2023leandojo,
title={LeanDojo: Theorem Proving with Retrieval-Augmented Language Models},
author={Yang, Kaiyu and Swope, Aidan and Gu, Alex and ...},
booktitle={Neural Information Processing Systems (NeurIPS)},
year={2023}
}# 在 YC-Killer 中添加 LeanDojo 代理
class LeanDojoAgent:
"""YC-Killer 的 LeanDojo 代理"""
pass# 在敏捷回顾中使用 LeanDojo 分析证明质量
class AgileLeanDojoAnalysis:
"""敏捷 + LeanDojo 分析"""
pass# 在 Leantime 中追踪证明进度
class LeantimeLeanDojoTracker:
"""Leantime + LeanDojo 追踪"""
pass- 版本兼容性: LeanDojo 需要 Lean 4 v4.3.0-rc2 或更高版本
- 性能: 数据提取可能需要较长时间
- GitHub Token: 需要设置
GITHUB_ACCESS_TOKEN环境变量 - 弃用警告: 原始 LeanDojo 已弃用,建议使用 LeanDojo-v2
| 功能 | 价值 |
|---|---|
| 数据提取 | 训练 AI 模型 |
| 战术预测 | AI 辅助证明 |
| 程序化控制 | 自动化验证 |
| 与 ML 集成 | 智能决策支持 |
✅ AI 辅助定理证明
✅ 自动战术建议
✅ 证明质量分析
✅ 数据驱动优化
✅ 智能代码补全
下一步: 将 LeanDojo 集成到您的项目中,增强 AI 辅助能力!