初始化毕业设计项目

k210/view_attendance.py

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+# K210考勤数据查看工具
+# 用于读取和显示SD卡中的考勤记录
+
+import os
+
+ATTENDANCE_FILE = "/sd/attendance_records.csv"
+
+def view_attendance_records(limit=20):
+    """查看最近的考勤记录"""
+    try:
+        if ATTENDANCE_FILE not in os.listdir("/sd"):
+            print("No attendance file found!")
+            return
+
+        with open(ATTENDANCE_FILE, "r") as f:
+            lines = f.readlines()
+
+        print("=" * 50)
+        print("Attendance Records (Total: {})".format(len(lines) - 1))
+        print("=" * 50)
+
+        # 显示表头
+        if len(lines) > 0:
+            print(lines[0].strip())
+            print("-" * 50)
+
+        # 显示最近的记录
+        start = max(1, len(lines) - limit)
+        for i in range(start, len(lines)):
+            print(lines[i].strip())
+
+        print("=" * 50)
+
+    except Exception as e:
+        print("Error reading file:", e)
+
+def clear_attendance_records():
+    """清空考勤记录（保留表头）"""
+    try:
+        with open(ATTENDANCE_FILE, "w") as f:
+            f.write("Timestamp,Student_ID,Name,Confidence,Status\n")
+        print("Attendance records cleared!")
+    except Exception as e:
+        print("Error clearing file:", e)
+
+# 显示最近20条记录
+view_attendance_records(20)
+
+# 如果需要清空记录，取消下面这行的注释
+# clear_attendance_records()