docstr: add table
  
  Args:
      header (list): list of header
      data (list): list of rows (list)
  Returns: HTML String
code: def add_table(header: list, data: list):
      """
      add table
  
      Args:
          header (list): list of header
          data (list): list of rows (list)
      Returns: HTML String
      """
      doc = Doc()
      with doc.tag("table"):
          doc.attr(klass="standard_table")
          with doc.tag("tr"):
              for h in header:
                  with doc.tag("th"):
                      doc.text(h)
          for row in data:
              with doc.tag("tr"):
                  for item in range(len(data[0])):
                      with doc.tag("td"):
                          doc.text(row[item])
      return doc.getvalue()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import datetime
  from yattag import Doc, indent
label_desc: Use image node_id 14 for calling the CustomHtml obj's underlying member method code with example usage: obj.add_table(header, data) and returns: doc