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Using the uint8[] type will result in a str, so if you don't mind the larger data size, it would be easy to change the spaces to the uint16[] type.

Alternatively, you could do the following

spaces = [ord(c) for c in space.spaces]
rospy.loginfo(spaces)

ref: https://answers.ros.org/question/341940/custom-ros-message-with-unit8-in-python/

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