parameters: (self, layer_name = None)
docstring: Changes the current default layer
docstring_summary: Changes the current default layer
docstring_tokens: Changes the current default layer
function: def change_layer(self, layer_name = None):
          """Changes the current default layer"""
          if not layer_name:
              layer_name = self.config['primary']
          self._current_layer = layer_name
          sys.ps1 = "({}) >>> ".format(self.current_layer)
function_tokens: def change_layer ( self , layer_name = None ) : if not layer_name : layer_name = self . config [ 'primary' ] self . _current_layer = layer_name sys . ps1 = "({}) >>> " . format ( self . current_layer )