class_docstr: Generic histogram class for real numbers
  
  Example:
  
      >>> h = Histogram(5)     # Initializing, bin width = 5
      >>> h << [2,3,2,7,8,5,5,0,7,9]     # Adding more items
      >>> print(h)
      N = 10, mean +- sd: 4.8000 +- 2.9740
      [ 0,  5): **** (4)
      [ 5, 10): ****** (6)
docstr: Plotting support
docstr_tok: ["Plotting","support"]
code: def __plot__(self, backend, context, **kwds):
      """Plotting support"""
      from igraph.drawing import DrawerDirectory
  
      drawer = DrawerDirectory.resolve(self, backend)(context)
      drawer.draw(self, **kwds)
  
imports: import math
label_desc: Use image node_id 11 for calling the Histogram obj's underlying member method code with example usage: obj.__plot__(backend, context) without return types