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2016-09-09 04:41:15 -0500 | asked a question | How to change from Python to PyPy to compile ROS Node ? I have a package where the nodes are written in python using rospy and other python modules. But lately i realized that PyPy is a better alternative than the default python interpreter. Basically, i want to change the interpreter such that when I run "rosrun pkg_name node_name", it will run using the PyPy interpreter instead of the Python Interpreter. I am guessing that this might be possible if I make some changes in the CMakeLists.txt file. Any help ? |
2016-09-07 01:53:10 -0500 | answered a question | run a subscriber callback once using rospy.spin() 2 Steps : Flag set to 0 in the class __init__ method. Step 1 : I believe a better alternate is to define the call back method in a class along with the subscriber. And then setting a flag which will be set to one once the callback method has been called for the first time. Step 2 : Once the Flag has been set 1, in the subscriber declaration block, return to the called block. An Example is given below : (Tested Works) class frontCam : def __init__(self): self.flag = 0 rospy.init_node("DFC") self.getVideo() However if you guys want, can close the callback method after a certain period using the ropy.sleep() and the return statement as well. |