updated command instructions.

example_1.md

@@ -18,7 +18,7 @@ Switch the mode to *navigation* mode using a rosservice call. Then drive the rob
 # Terminal 2
 rosservice call /switch_to_navigation_mode
 cd catkin_ws/src/stretch_tutorials/src/
-python move.py
+python3 move.py
 ```
 To stop the node from sending twist messages, type **Ctrl** + **c**.
 
@@ -152,7 +152,7 @@ After saving the edited node, bringup [Stretch in the empty world simulation](ga
 
 ```bash
 cd catkin_ws/src/stretch_tutorials/src/
-python move.py
+python3 move.py
 ```
 To stop the node from sending twist messages, type **Ctrl** + **c**.
 

example_10.md

@@ -24,7 +24,7 @@ Then run the tf2 broadcaster node to visualize three static frames.
 ```bash
 # Terminal 3
 cd catkin_ws/src/stretch_tutorials/src/
-python tf2_broadcaster.py
+python3 tf2_broadcaster.py
 ```
 
 The gif below visualizes what happens when running the previous node.
@@ -37,7 +37,7 @@ The gif below visualizes what happens when running the previous node.
 ```bash
 # Terminal 4
 cd catkin_ws/src/stretch_tutorials/src/
-python stow_command.py
+python3 stow_command.py
 ```
 
 
@@ -214,7 +214,7 @@ Then run the tf2 broadcaster node to create the three static frames.
 ```bash
 # Terminal 2
 cd catkin_ws/src/stretch_tutorials/src/
-python tf2_broadcaster.py
+python3 tf2_broadcaster.py
 ```
 
 Finally, run the tf2 listener node to print the transform between two links.
@@ -222,7 +222,7 @@ Finally, run the tf2 listener node to print the transform between two links.
 ```bash
 # Terminal 3
 cd catkin_ws/src/stretch_tutorials/src/
-python tf2_listener.py
+python3 tf2_listener.py
 ```
 
 Within the terminal the transform will be printed every 1 second. Below is an example of what will be printed in the terminal. There is also an image for reference of the two frames.

example_11.md

@@ -22,7 +22,7 @@ Then run the `PointCloud` transformer node.
 ```bash
 # Terminal 3
 cd catkin_ws/src/stretch_tutorials/src/
-python pointcloud_transformer.py
+python3 pointcloud_transformer.py
 ```
 
 Within this tutorial package, there is an RViz config file with the `PointCloud` in the Display tree. You can visualize this topic and the robot model by running the command below in a new terminal.

example_2.md

@@ -55,7 +55,7 @@ To filter the lidar scans for ranges that are directly in front of Stretch (widt
 ```bash
 # Terminal 3
 cd catkin_ws/src/stretch_tutorials/src/
-python scan_filter.py
+python3 scan_filter.py
 ```
 
 Then run the following command to bring up a simple RViz configuration of the Stretch robot.

example_3.md

@@ -20,7 +20,7 @@ To set *navigation* mode and to activate the avoider node, type the following in
 # Terminal 3
 rosservice call /switch_to_navigation_mode
 cd catkin_ws/src/stretch_tutorials/src/
-python avoider.py
+python3 avoider.py
 ```
 To stop the node from sending twist messages, type **Ctrl** + **c** in the terminal running the avoider node.
 

example_4.md

@@ -16,7 +16,7 @@ the `rviz` flag will open an RViz window  to visualize a variety of ROS topics.
 ```bash
 # Terminal 2
 cd catkin_ws/src/stretch_tutorials/src/
-python marker.py
+python3 marker.py
 ```
 The gif below demonstrates how to add a new *Marker* display type, and change the topic name from `visualization_marker` to `balloon`. A red sphere Marker should appear above the Stretch robot.
 

example_5.md

@@ -15,7 +15,7 @@ You can then hit the run-stop button (you should hear a beep and the LED light i
 
 ```bash
 cd catkin_ws/src/stretch_tutorials/src/
-python joint_state_printer.py
+python3 joint_state_printer.py
 ```
 Your terminal will output the `position` information of the previously mentioned joints shown below.
 ```

example_6.md

@@ -20,7 +20,7 @@ Switch the mode to *position* mode using a rosservice call. Then run the single
 # Terminal 2
 rosservice call /switch_to_position_mode
 cd catkin_ws/src/stretch_tutorials/src/
-python effort_sensing.py
+python3 effort_sensing.py
 ```
 
 This will send a `FollowJointTrajectory` command to move Stretch's arm or head while also printing the effort of the lift.
@@ -302,7 +302,7 @@ Once you have changed the file name, then run the following in a new command.
 
 ```bash
 cd catkin_ws/src/stretch_tutorials/src/
-python stored_data_plotter.py
+python3 stored_data_plotter.py
 
 ```
 

example_7.md

@@ -64,7 +64,7 @@ In this section, you can use a Python node to capture an image from the RealSens
 ```bash
 # Terminal 4
 cd ~/catkin_ws/src/stretch_tutorials/src
-python capture_image.py
+python3 capture_image.py
 ```
 
 An image named **camera_image.jpeg** is saved in the **stored_data** folder in this package.
@@ -214,7 +214,7 @@ In this section, we highlight a node that utilizes the [Canny Edge filter](https
 ```bash
 # Terminal 4
 cd ~/catkin_ws/src/stretch_tutorials/src
-python edge_detection.py
+python3 edge_detection.py
 ```
 
 The node will publish a new Image topic named */image_edge_detection*. This can be visualized in RViz and a gif is provided below for reference.

example_8.md

@@ -20,7 +20,7 @@ Then run the speech_text node.
 ```bash
 # Terminal 2
 cd catkin_ws/src/stretch_tutorials/src/
-python speech_text.py
+python3 speech_text.py
 ```
 
 The ReSpeaker will be listening and will start to interpret speech and save the transcript to a text file.  To stop shutdown the node, type **Ctrl** + **c** in the terminal.

example_9.md

@@ -22,7 +22,7 @@ Then run the voice teleoperation base node in a new terminal.
 ```bash
 # Terminal 3
 cd catkin_ws/src/stretch_tutorials/src/
-python voice_teleoperation_base.py
+python3 voice_teleoperation_base.py
 ```
 
 In terminal 3, a menu of voice commands is printed. You can reference this menu layout below.  

follow_joint_trajectory.md

@@ -22,7 +22,7 @@ Switch the mode to *position* mode using a rosservice call. Then run the stow co
 # Terminal 2
 rosservice call /switch_to_position_mode
 cd catkin_ws/src/stretch_tutorials/src/
-python stow_command.py
+python3 stow_command.py
 ```
 
 
@@ -174,7 +174,7 @@ Switch the mode to *position* mode using a rosservice call. Then run the multipo
 # Terminal 2
 rosservice call /switch_to_position_mode
 cd catkin_ws/src/stretch_tutorials/src/
-python multipoint_command.py
+python3 multipoint_command.py
 ```
 
 This will send a list of `JointTrajectoryPoint` message types to move Stretch's arm.
@@ -324,7 +324,7 @@ Switch the mode to *position* mode using a rosservice call. Then run the single
 # Terminal 2
 rosservice call /switch_to_position_mode
 cd catkin_ws/src/stretch_tutorials/src/
-python single_joint_actuator.py
+python3 single_joint_actuator.py
 ```
 
 This will send a list of `JointTrajectoryPoint` message types to move Stretch's arm.