Anders and Briegel in Python
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  1. import time, atexit, json
  2. import networkx
  3. import numpy as np
  4. import websocket
  5. from socket import error as socket_error
  6. import graphstate
  7. import clifford
  8. import util
  9. class GraphState(graphstate.GraphState, networkx.Graph):
  10. def __init__(self, *args, **kwargs):
  11. graphstate.GraphState.__init__(self, *args, **kwargs)
  12. self.connect_to_server()
  13. def connect_to_server(self, uri = "ws://localhost:5000"):
  14. """ Attempt to connect to the websocket server """
  15. try:
  16. self.ws = websocket.create_connection(uri)
  17. atexit.register(self.shutdown)
  18. except socket_error:
  19. self.ws = None
  20. def shutdown(self):
  21. """ Close the connection to the websocket """
  22. self.update()
  23. self.ws.close()
  24. def update(self, delay = 0.5):
  25. """ Call this function when you are ready to send data to the browser """
  26. if not self.ws:
  27. return
  28. # Automatically perform layout if position is not provided
  29. if not all(("position" in node) for node in self.node.values()):
  30. self.layout()
  31. #if not all(("vop" in node) for node in self.node.values()):
  32. #self.add_vops()
  33. # Send data to browser and rate-limit
  34. self.ws.send(json.dumps(self.to_json()))
  35. time.sleep(delay)
  36. def layout(self, dim=3):
  37. """ Automatically lay out the graph """
  38. pos = networkx.spring_layout(self, dim, scale=np.sqrt(self.order()))
  39. middle = np.average(pos.values(), axis=0)
  40. pos = {key: value - middle for key, value in pos.items()}
  41. for key, (x, y, z) in pos.items():
  42. self.node[key]["position"] = util.xyz(x, y, z)
  43. def add_vops(self):
  44. """ Automatically add vops if they're not present """
  45. for key in self.node:
  46. if not "vop" in self.node[key]:
  47. self.node[key]["vop"] = clifford.by_name["identity"]