use argparse for argument parsing

bitbots_dynamic_kick/scripts/dummy_client.py

@@ -3,6 +3,7 @@
 from __future__ import print_function
 import sys
 
+import argparse
 import math
 from time import sleep
 import random
@@ -20,6 +21,11 @@
 showing_feedback = False
 
 if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument('ball_y', nargs=1, type=float, help='y position of the ball [m]', default=0)
+    parser.add_argument('kick_direction', nargs=1, type=float, help='kick direction [°]', default=0)
+    args = parser.parse_args()
+
     print("Beware: this script may only work when calling it directly on the robot "
           "and will maybe result in tf errors otherwise")
     print("[..] Initializing node", end='')
@@ -79,10 +85,10 @@ def feedback_cb(feedback):
     frame_prefix = "" if os.environ.get("ROS_NAMESPACE") is None else os.environ.get("ROS_NAMESPACE") + "/"
     goal.header.frame_id = frame_prefix + "base_footprint"
     goal.ball_position.x = 0.2
-    goal.ball_position.y = float(sys.argv[1])
+    goal.ball_position.y = args.ball_y
     goal.ball_position.z = 0
 
-    goal.kick_direction = Quaternion(*quaternion_from_euler(0, 0, math.radians(float(sys.argv[2]))))
+    goal.kick_direction = Quaternion(*quaternion_from_euler(0, 0, math.radians(args.kick_direction)))
 
     goal.kick_speed = 1