Make PyBullet's function call outputs more semantic

[YagoGG]

Hello!

I have noticed that PyBullet returns tuples with multiple values whenever a function provides multiple values.

For instance, in getJointState:

return key	type
jointPosition	float
jointVelocity	float
jointReactionForces	list of 6 floats
appliedJointMotorTorque	float

The returned value would be a tuple like this one:

>>> joint_state = client.getJointState(body_id, joint_index)
>>> joint_state
(0.9871899972955821, 59.030020444882304, (0.0, 0.0, 0.0, 0.0, 0.0, 0.0), -240.0)
>>> joint_state[0]  # Get the joint's position.
0.9871899972955821

I wonder if this is because a specific underlying implementation decision, or if it would be worth modifying PyBullet to return a more "semantic" structure like a namedtuple.

Following the previous example, it would look something like this:

>>> joint_state = client.getJointState(body_id, joint_index)
>>> joint_state
JointState(joint_position=0.9871899972955821, joint_velocity=59.030020444882304, joint_reaction_forces=(0.0, 0.0, 0.0, 0.0, 0.0, 0.0), applied_joint_motor_torque=-240.0)
>>> joint_state.joint_position
0.9871899972955821

Which, in my opinion, feels more pythonic and makes code easier to read.

Cheers!