fix readme and add gitigore

Author: GeneHit

.DS_Store

@@ -0,0 +1,2 @@
+__pycache__
+.DS_Store

.gitignore

@@ -11,14 +11,14 @@ movement of mechanical systems. Below is a simple diagram of a motion control sy
 ```mermaid
 graph LR
     subgraph Control_Flow
-        A[Computer] --->|Commands|---> B[Motion Control Card]
-        B --->|Control Signals|---> C[Motor Driver]
-        C --->|Power|---> D[Motor]
-        D --->|Movement|---> E[Mechanical System]
+        A[Computer] --> |Commands| --> B[Motion Control Card]
+        B --> |Control Signals| --> C[Motor Driver]
+        C --> |Power| --> D[Motor]
+        D --> |Movement| --> E[Mechanical System]
     end
     subgraph Feedback_Loop
-        E --->|Feedback|---> F[Sensor]
-        F --->|Data|---> B ---> A
+        E --> |Feedback| --> F[Sensor]
+        F --> |Data| --> B --> A
     end
 ```
 

README.md

@@ -36,7 +36,6 @@ def close(self):
 
     def send_cmd(
         self,
-        cmd_lock: threading.Lock,
         cmd: str,
         direct_or_execute: str = "direct"
     ) -> str:
@@ -58,13 +57,13 @@ def send_cmd(
         response : str
             The response detail.
         """
-        with cmd_lock:
+        with self._cmd_lock:
             if direct_or_execute == "direct":
                 # direct command interface, only supports motion functions, parameters and array variables configuration
-                success, response = zmotion_direct(controller_handle, cmd)
+                success, response = zmotion_direct(self._controller_handle, cmd)
             else:
                 # Universal command execution interface, getting block when the controller is not buffered
-                success, response = zmotion_execute(controller_handle, cmd)
+                success, response = zmotion_execute(self._controller_handle, cmd)
 
         if not success == 0:
             raise ConnectionError(