code: def is_path(self):
      if len(self.root.children) > 1:
          return False
      for i in self.nodes:
          if (
              len(self.nodes[i]) > 1
              or len(self.nodes[i][0].children) > 1
          ):
              return False
      return True
  
file_path: mlxtend/mlxtend/frequent_patterns/fpcommon.py
imports: import collections
  import warnings
  import numpy
  import pandas
  from pandas import __version__
label_desc: Use image node_id 4 for calling the FPTree obj's underlying member method code with example usage: obj.is_path() and returns: True, False, False