class_docstr: Histogram chart class
class_docstr_tok: ["Histogram","chart","class"]
docstr: All y values
docstr_tok: ["All","y","values"]
code: def yvals(self):
      """All y values"""
      return [
          val[0]
          for serie in self.series
          for val in serie.values
          if val[0] is not None
      ]
  
file_path: pygal/pygal/graph/histogram.py
imports: from pygal.graph.bar import Bar
  from pygal.graph.dual import Dual
  from pygal.util import alter, cached_property, decorate
label_desc: Use image node_id 4 for calling the Histogram obj's underlying member method code with example usage: obj.yvals() and returns: unknown