diff --git a/q1/main.py b/q1/main.py
new file mode 100644
index 0000000..eb7c33c
--- /dev/null
+++ b/q1/main.py
@@ -0,0 +1,44 @@
+import json
+import os
+def analyze_log(filepath):
+    d={
+        "total":0,
+        "by_level":{},
+        "by_user":{},
+        "last_error":None
+    }
+    if not os.path.exists(filepath):
+        return d
+    try:
+        f=open(filepath,'r',encoding='utf-8')
+        lines=f.readlines()
+    except:
+        return d
+
+    for line in lines:
+        line = line.strip()
+        if line =="":
+            continue
+        try:
+            data = json.loads(line)
+        except:
+            continue
+
+        d["total"]+=1
+
+        lvl=data["level"]
+        usr=data["user"]
+
+        if lvl not in d["by_level"]:
+            d["by_level"][lvl]=0
+        d["by_level"][lvl]=d["by_level"][lvl]+1
+
+        if usr not in d["by_user"]:
+            d["by_user"][usr]=0
+        d["by_user"][usr]=d["by_user"][usr]+1
+
+        if lvl == "ERROR":
+            d["last_error"]=data["message"]
+
+    f.close()
+    return d
diff --git a/q1/test.py b/q1/test.py
new file mode 100644
index 0000000..731fcdd
--- /dev/null
+++ b/q1/test.py
@@ -0,0 +1,13 @@
+from main import analyze_log
+f = open("app.jsonl","w",encoding="utf-8")
+f.write('{"timestamp": "2026-10-01 10:23:45", "level": "INFO", "message": "用户登录成功", "user": "张三"}\n')
+f.write('{"timestamp": "2026-10-01 10:24:01", "level": "ERROR", "message": "数据库连接失败", "user": "李四"}\n')
+f.write('随便写的\n')
+f.write('{"timestamp": "2026-10-01 10:27:00", "level": "INFO", "message": "任务完成", "user": "王五"}\n')
+f.close()
+
+res=analyze_log("app.jsonl")
+print("总数:",res["total"])
+print("级别统计：",res["by_level"])
+print("用户统计",res["by_user"])
+print("最后一条错误：",res["last_error"])
\ No newline at end of file