Create basic/documentation.py

command/basic/documentation.py

@@ -0,0 +1,17 @@
+from typing import Optional
+from ..command_handler import CommandHandler
+
+class DocumentationHandler(CommandHandler):
+   def __init__(self, commands, successor: Optional["CommandHandler"] = None):
+        super().__init__(successor)
+        self.commands = commands
+
+    def handle_command(self, command):
+        if command.lower() in self.commands:
+            print(self.execute_command())
+        else:
+            super().handle_command(command)
+
+    def execute_command(self):
+        return "Download ..."
+