title: Unable to 'append' data to existing sheets in excel using python
body: <p>I have two sets of data which I want to append in different excel sheets using python.</p>
  <p>I tried the following code but it actually writes a new sheet ex: education and experience, education1 and experience1.</p>
  <pre><code>with pd.ExcelWriter('profile.xlsx',engine='openpyxl', mode = 'a') as writer:
      df_experience.to_excel(writer, sheet_name = 'experience', index = False)
      df_education.to_excel(writer, sheet_name = 'education', index = False)
  </code></pre>
  <p>what can i do to 'append' data to existing sheets?</p>