title: Python - Validate if a sheet exists in my document xls
body: <p>I am trying to design a small program on my free time which loads an xls file, then select a sheet in the document to be scanned.</p>
  
  <p>Step 1: the user imports an .xls file . After importing the program checks whether the file exists. (That I can do )</p>
  
  <p>Step 2: I ask the user to give the name of the document sheet xls to analyze. And that 's where it stops. the program does not detect the sheets available :(</p>
  
  <pre><code>#check if the document exist
  while True:
      x = input("Give the name of the document in this repository__")
      input_filename = x + ".xls"
      if os.path.isfile(input_filename):
          print ("the document is been charged")
          break
      else:
          print("xls not found !")
  
  #Load the document
  xls_file = pd.ExcelFile(input_filename)
  
  #Select the good sheet in file
  print ("this is your sheets in this document",xls_file.sheet_names)
  while True:
      feuilles = input("Select yout sheet")
      input_feuilles = feuilles
      if xls_file.sheet_names(input_filename):
          print ("The sheet is been charged !")
          break
      else:
          print("This sheet don't exist!")
  </code></pre>
  
  <p>I really do not know how to verify that the sheet filled by the user really exists.</p>