docstr: A proxy-call to the dataframe's `.append()`.
code: def append(self, other):
      """
      A proxy-call to the dataframe's `.append()`.
      """
      return self.dataframe.append(other=other)
  
imports: from abc import ABC
label_desc: Use image node_id 23 for calling the DataframeAbstract obj's underlying member method code with example usage: obj.append(other) and returns: self