Access to the poses in poselib I have an object with assigned armature .To this armature is assigned poselib, with several poses.Now my intention is to access all of the bones position in my python script from the poselib list

I will be very grateful for any hint.
A pose library is simply an Action datablock. Each pose is actually a marker in the pose_markers collection; you can use the marker's frame property to evaluate the action's fcurves, which gives you the pose.