refactor: 命令基本完成

pkg/command/errors.py

@@ -1,12 +1,33 @@
 
 
 class CommandError(Exception):
-    pass
+    
+    def __init__(self, message: str = None):
+        self.message = message
+    
+    def __str__(self):
+        return self.message
 
 
 class CommandNotFoundError(CommandError):
-    pass
+    
+    def __init__(self, message: str = None):
+        super().__init__("未知命令: "+message)
 
 
 class CommandPrivilegeError(CommandError):
-    pass
+    
+    def __init__(self, message: str = None):
+        super().__init__("权限不足: "+message)
+
+
+class ParamNotEnoughError(CommandError):
+    
+    def __init__(self, message: str = None):
+        super().__init__("参数不足: "+message)
+
+
+class CommandOperationError(CommandError):
+    
+    def __init__(self, message: str = None):
+        super().__init__("操作失败: "+message)