title: Finding distinct values of a column from a sheet of excel file in python
body: <blockquote>
  <p><strong>How can I find the first column's distict values from sheet3 ?</strong></p>
  </blockquote>
  <pre><code>import sys
  import pandas as pd
  
  
  excel_file = &quot;dataset.xlsx&quot;
  datasets = pd.ExcelFile(excel_file)
  
  sheet0 = pd.read_excel(datasets, 'Title Sheet')
  sheet3 = pd.read_excel(excel_file, sheet_name=3, index_col=0)
  sheet4 = pd.read_excel(excel_file, sheet_name=4, index_col=0)
  sheet1 = pd.read_excel(excel_file, sheet_name=1, index_col=0)
  
  customer_data = pd.concat([sheet3, sheet4, sheet1])
  </code></pre>