Rosservice doesn't show up when running server script

edit

I'm getting a really weird error with a script I'm testing.

import logging
import os
import subprocess
import sys

import gphoto2 as gp
import rospy
from std_msgs.msg import Empty
from nav_msgs.msg import Odometry
from dense_scan.srv import capture, captureResponse # TODO: capitalize and add Message
from pdb import set_trace as bp
# import geometry_msgs.msg
# import tf.msg

def capture_img(request):
    bp()
    return True

if __name__ == '__main__':
    rospy.init_node('capture')  # make node
    rospy.Service('/snap360', capture, capture_img)
    rospy.spin()

when I run that script using rosrun, it basically hangs and the service doesn't get registered with ROS. But when I step through the code with pdb, as in rosrun --prefix 'python -m pdb' my_package service.py it will run fine and shows up when I call rosservice list. What's going on here?! Also, I removed most of the contents of the script to see where the error's coming from...