[update] Update shebang of 'visualizer.py'

Author: ShigemichiMatsuzaki

script/visualizer.py

@@ -1,5 +1,5 @@
-#!/usr/bin/python                                             
-# -*- coding: utf-8 -*- 
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
 
 # ============================================
 __author__ = "ShigemichiMatsuzaki"
@@ -14,8 +14,10 @@
 from cv_bridge import CvBridge
 import copy
 
+
 class Visualizer:
     """ """
+
     def __init__(self):
         """ Constructor of Visualizer class
 
@@ -24,14 +26,18 @@ def __init__(self):
         """
         # Subscribers
         self.image_sub = message_filters.Subscriber('image', Image)
-        self.start_point_sub = message_filters.Subscriber('start_point', PointStamped)
-        self.end_point_sub = message_filters.Subscriber('end_point', PointStamped)
+        self.start_point_sub = message_filters.Subscriber(
+            'start_point', PointStamped)
+        self.end_point_sub = message_filters.Subscriber(
+            'end_point', PointStamped)
         # Time synchronizer
-        self.ts = message_filters.TimeSynchronizer([self.image_sub, self.start_point_sub, self.end_point_sub], 100)
+        self.ts = message_filters.TimeSynchronizer(
+            [self.image_sub, self.start_point_sub, self.end_point_sub], 100)
         self.ts.registerCallback(self.image_points_callback)
 
         # Publisher
-        self.image_pub = rospy.Publisher('image_and_path', Image, queue_size=100)
+        self.image_pub = rospy.Publisher(
+            'image_and_path', Image, queue_size=100)
 
         self.bridge = CvBridge()
 
@@ -43,12 +49,14 @@ def image_points_callback(self, img_msg, start_point_msg, end_point_msg):
             start_point_msg(geometry_msgs/PointStamped)
             end_point_msg(geometry_msgs/PointStamped)
         """
-        # Convert the image message to 
-        cv_image = self.bridge.imgmsg_to_cv2(img_msg, desired_encoding='passthrough')
+        # Convert the image message to
+        cv_image = self.bridge.imgmsg_to_cv2(
+            img_msg, desired_encoding='passthrough')
 
         cv_image_with_line = self.draw_line(cv_image,
-            (int(start_point_msg.point.x), int(start_point_msg.point.y)),
-            (int(end_point_msg.point.x), int(end_point_msg.point.y)))
+                                            (int(start_point_msg.point.x),
+                                             int(start_point_msg.point.y)),
+                                            (int(end_point_msg.point.x), int(end_point_msg.point.y)))
 
         vis_img_msg = self.bridge.cv2_to_imgmsg(cv_image_with_line)
 
@@ -61,26 +69,28 @@ def draw_line(self, cv_image, start_point, end_point):
             cv_image(OpenCV image)
             start_point_msg(geometry_msgs/PointStamped)
             end_point_msg(geometry_msgs/PointStamped)
-        
+
         Return:
             OpenCV image with a line drawn
         """
         ret_image = copy.deepcopy(cv_image)
 
-        cv2.line(ret_image, start_point, end_point, color=(0, 0, 255), thickness=10)
+        cv2.line(ret_image, start_point, end_point,
+                 color=(0, 0, 255), thickness=10)
 
         return ret_image
 
+
 def main():
     """Main function to initialize the ROS node"""
     rospy.init_node("visualizer")
 
     visualizer = Visualizer()
 
     rospy.loginfo('visualizer is initialized')
-    
-    rospy.spin()  
+
+    rospy.spin()
 
 
-if __name__=='__main__':
+if __name__ == '__main__':
     main()