docstr: Sets the longitude of the map's center. By default, the map's
  longitude center lies at the middle of the longitude range for
  scoped projection and above `projection.rotation.lon`
  otherwise.
  
  The 'lon' property is a number and may be specified as:
    - An int or float
  
  Returns
  -------
  int|float
code: def lon(self):
      """
      Sets the longitude of the map's center. By default, the map's
      longitude center lies at the middle of the longitude range for
      scoped projection and above `projection.rotation.lon`
      otherwise.
  
      The 'lon' property is a number and may be specified as:
        - An int or float
  
      Returns
      -------
      int|float
      """
      return self["lon"]
  
file_path: catboost/contrib/python/plotly/py3/plotly/graph_objs/layout/geo/_center.py
imports: from plotly.basedatatypes import BaseLayoutHierarchyType
  import copy
label_desc: Use image node_id 3 for calling the Center obj's underlying member method code with example usage: obj.lon() and returns: self