fix：新增例程

基础编程/e6.ROS环境下python测试实验/code/talker.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+import rospy
+from std_msgs.msg import String
+
+def talker():
+    pub = rospy.Publisher('chatter', String, queue_size=10)
+    rospy.init_node('talker', anonymous=True)
+    rate = rospy.Rate(10) # 10hz
+    while not rospy.is_shutdown():
+        hello_str = "hello world %s" % rospy.get_time()
+        rospy.loginfo(hello_str)
+        pub.publish(hello_str)
+        rate.sleep()
+
+if __name__ == '__main__':
+    try:  
+        talker()  
+    except rospy.ROSInterruptException:
+        pass