From 7d1d9504e133e752d39284f1ec1b315f670bafad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E5=A0=83=E8=90=A5?= <1572506709@qq.com>
Date: Wed, 7 Oct 2026 23:48:41 +0800
Subject: [PATCH] =?UTF-8?q?=E7=BC=96=E7=A8=8B=E9=A2=981=EF=BC=9AJSON=20?=
 =?UTF-8?q?=E6=97=A5=E5=BF=97=E7=AE=A1=E9=81=93?=
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---
 .gitignore |  4 ++++
 q1/main.py | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 q1/main.py

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e652c23
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+# Python 缓存
+__pycache__/
+*.pyc
+*.pyo
diff --git a/q1/main.py b/q1/main.py
new file mode 100644
index 0000000..971a978
--- /dev/null
+++ b/q1/main.py
@@ -0,0 +1,47 @@
+import json
+import os
+
+
+def analyze_log(filepath: str) -> dict:
+    """解析 JSON Lines 日志文件，返回统计结果。"""
+    # 结果字典，先填好默认值（也就是空结果）
+    result = {
+        "total": 0,
+        "by_level": {},
+        "by_user": {},
+        "last_error": None,
+    }
+
+    # 文件不存在时，直接返回空结果，不报错
+    if not os.path.exists(filepath):
+        return result
+
+    with open(filepath, "r", encoding="utf-8") as f:
+        for line in f:
+            line = line.strip()
+            # 空行跳过
+            if not line:
+                continue
+
+            # 某行不是合法 JSON 就跳过这一行，不影响整体解析
+            try:
+                data = json.loads(line)
+            except json.JSONDecodeError:
+                continue
+
+            # 成功解析一条，总数加一
+            result["total"] += 1
+
+            # 按 level 计数
+            level = data["level"]
+            result["by_level"][level] = result["by_level"].get(level, 0) + 1
+
+            # 按 user 计数
+            user = data["user"]
+            result["by_user"][user] = result["by_user"].get(user, 0) + 1
+
+            # 记录最后一条 ERROR 的 message
+            if level == "ERROR":
+                result["last_error"] = data["message"]
+
+    return result