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What do you mean with "implements serializable"? The Marker type is of course serializable. All ROS message types are serializable. Here an example:

import roslib roslib.load_manifest("visualization_msgs") import visualization_msgs.msg m=visualization_msgs.msg.Marker() a=str(m)

In [55]: a Out[55]: "header: \n seq: 0\n stamp: \n secs: 0\n nsecs: 0\n frame_id: ''\nns: ad\nid: 0\ntype: 0\naction: 0\npose: \n position: \n x: 0.0\n y: 0.0\n z: 0.0\n orientation: \n x: 0.0\n y: 0.0\n z: 0.0\n w: 0.0\nscale: \n x: 0.0\n y: 0.0\n z: 0.0\ncolor: \n r: 0.0\n g: 0.0\n b: 0.0\n a: 0.0\nlifetime: \n secs: 0\n nsecs: 0\nframe_locked: False\npoints: []\ncolors: []\ntext: asdfadf\nmesh_resource: adfa\nmesh_use_embedded_materials: False"

Here serialized in the yaml format in a string variable. You can also use the methods m.serialize and m.serialize_numpy

What do you mean with "implements serializable"? The Marker type is of course serializable. All ROS message types are serializable. Here an example:

import roslib
roslib.load_manifest("visualization_msgs")
import visualization_msgs.msg
m=visualization_msgs.msg.Marker()
a=str(m)
a=str(m)
  
In [55]: a
Out[55]: "header: \n  seq: 0\n  stamp: \n    secs: 0\n    nsecs: 0\n  frame_id: ''\nns: ad\nid: 0\ntype: 0\naction: 0\npose: \n  position: \n    x: 0.0\n    y: 0.0\n    z: 0.0\n  orientation: \n    x: 0.0\n    y: 0.0\n    z: 0.0\n    w: 0.0\nscale: \n  x: 0.0\n  y: 0.0\n  z: 0.0\ncolor: \n  r: 0.0\n  g: 0.0\n  b: 0.0\n  a: 0.0\nlifetime: \n  secs: 0\n  nsecs: 0\nframe_locked: False\npoints: []\ncolors: []\ntext: asdfadf\nmesh_resource: adfa\nmesh_use_embedded_materials: False"False"

What do you mean with "implements serializable"? The Marker type is of course serializable. All ROS message types are serializable. Here an example:

import roslib
roslib.load_manifest("visualization_msgs")
import visualization_msgs.msg
m=visualization_msgs.msg.Marker()
a=str(m)

In [55]: a
Out[55]: "header: \n  seq: 0\n  stamp: \n    secs: 0\n    nsecs: 0\n  frame_id: ''\nns: ad\nid: 0\ntype: 0\naction: 0\npose: \n  position: \n    x: 0.0\n    y: 0.0\n    z: 0.0\n  orientation: \n    x: 0.0\n    y: 0.0\n    z: 0.0\n    w: 0.0\nscale: \n  x: 0.0\n  y: 0.0\n  z: 0.0\ncolor: \n  r: 0.0\n  g: 0.0\n  b: 0.0\n  a: 0.0\nlifetime: \n  secs: 0\n  nsecs: 0\nframe_locked: False\npoints: []\ncolors: []\ntext: asdfadf\nmesh_resource: adfa\nmesh_use_embedded_materials: False"

Here the message has been serialized in the yaml format in and stored a string variable. You can also use the methods m.serialize the methods "Marker.serialize" and m.serialize_numpy"Marker.serialize_numpy" in conjunction with the io.StringIO class