Publish Joint_State with Python to RVIZ

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I have a robot that I built in URDF that I am visualizing in RVIZ. I can control the joints using the gui tool or a rostopic pub command, but I am unable to build a publisher node to interface with the rviz visualization.

The rostopic pub works fine so I tried to build a ros package that would publish the joint information to the rviz visualization. "Rostopic echo /joint_states" lists the newly published command, but the rviz model does not move.

I am able to use the following command to move the robot using a terminal:

rostopic pub -1 /joint_states sensor_msgs/JointState '{header: auto, name: ['joint0', 'joint1', 'joint2', 'joint3'], position: [1, 0.5418, -1.7297, -3.1017], velocity: [], effort: []}'

Here is the code I am trying to build to publish the same information. I built it into a package that I am running:

#!/usr/bin/env python

import rospy
from sensor_msgs.msg import JointState
from std_msgs.msg import Header

def talker():
    pub = rospy.Publisher('joint_states', JointState, queue_size=10)
    rospy.init_node('joint_state_publisher')
    rate = rospy.Rate(10) # 10hz
    hello_str = JointState()
    hello_str.header = Header()
    hello_str.header.stamp = rospy.Time.now()
    hello_str.name = ['joint0', 'joint1', 'joint2', 'joint3']
    hello_str.position = [3, 0.5418, -1.7297, -3.1017]
    hello_str.velocity = []
    hello_str.effort = []
    pub.publish(hello_str)
    rate.sleep()

if __name__ == '__main__':
    try:
        talker()
    except rospy.ROSInterruptException:
        pass

After I run the package to move the robot, rostopic list shows the new state, but the robot has not moved in RVIZ.