code: def is_valid_point(pt):
      latitude, longitude = pt
      return (-90.0 <= latitude <= 90.0) and (
          -180.0 <= longitude <= 180.0
      )
  
imports: import re
  import traitlets
  from .locations import locations_to_list
label_desc: Use image node_id 1 for calling a global function with example usage: is_valid_point(pt) and returns: unknown