code: def _check_left_in_edges_num(self, in_node_name, node):
      count = 0
      for in_edge in node.in_edges:
          if in_node_name == in_edge.split(":")[0]:
              count += 1
      return count
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
label_desc: Use image node_id 14 for calling the Graph obj's underlying member method code with example usage: obj._check_left_in_edges_num(in_node_name, node) and returns: count