添加 q1/main.py

q1/main.py

@@ -0,0 +1,46 @@
+import json
+import os
+
+def analyze_log(filepath: str) -> dict:
+    if not os.path.exists(filepath):
+        return {}
+
+    total = 0
+    by_level = {}
+    by_user = {}
+    last_error = None
+
+    try:
+        with open(filepath, 'r', encoding="utf-8") as f:
+            first_line = f.readline()
+            if not first_line.strip():
+                return {}
+
+            f.seek(0)
+            for line in f:
+                line = line.strip()
+                if not line:
+                    continue
+                try:
+                    log_entry = json.loads(line)
+                    level = log_entry["level"]
+                    user = log_entry["user"]
+                    message = log_entry["message"]
+                except (json.JSONDecodeError, TypeError, KeyError):
+                    continue
+
+                total += 1
+                by_level[level] = by_level.get(level, 0) + 1
+                by_user[user] = by_user.get(user, 0) + 1
+
+                if level == "ERROR":
+                    last_error = message
+    except OSError:
+        return {}
+
+    return {
+        "total": total,
+        "by_level": by_level,
+        "by_user": by_user,
+        "last_error": last_error
+    }