王堃营
48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
import json
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import os
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def analyze_log(filepath: str) -> dict:
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"""解析 JSON Lines 日志文件，返回统计结果。"""
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# 结果字典，先填好默认值（也就是空结果）
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result = {
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"total": 0,
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"by_level": {},
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"by_user": {},
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"last_error": None,
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}
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# 文件不存在时，直接返回空结果，不报错
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if not os.path.exists(filepath):
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return result
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with open(filepath, "r", encoding="utf-8") as f:
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for line in f:
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line = line.strip()
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# 空行跳过
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if not line:
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continue
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# 某行不是合法 JSON 就跳过这一行，不影响整体解析
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try:
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data = json.loads(line)
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except json.JSONDecodeError:
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continue
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# 成功解析一条，总数加一
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result["total"] += 1
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# 按 level 计数
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level = data["level"]
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result["by_level"][level] = result["by_level"].get(level, 0) + 1
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# 按 user 计数
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user = data["user"]
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result["by_user"][user] = result["by_user"].get(user, 0) + 1
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# 记录最后一条 ERROR 的 message
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if level == "ERROR":
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result["last_error"] = data["message"]
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return result
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