title: Combine multiple xlsx File in single Xlsx File
body: <p>I have multiple xlsx File which contain two worksheet(data,graph). I have created graph using xlsxwriter in graph worksheet and write data in data worksheet. So I need to combine all graph worksheet into single xlsx File. So My question is:</p>
  
  <p>openpyxl : In openpyxl module, we can load another workbook and modify the value.is there anyway to append new worksheet of another File. For Example.
  I have two xlsx data.xlsx(graph worksheet) and data_1.xlsx(graph worksheet)
  So Final xlsx (graph worksheet and graph_1 worksheet)</p>
  
  <p>xlsxwriter : As of my understanding, we can not modify existing xlsx File. Do we any update into this module.</p>