title: Django and xlrd, reading from memory
body: <p>My plan is to let a user to upload an excel file, once uploaded I will be displaying editable form which contains the content of the uploaded excel, once user confirms the input is correct, he/she hits the save button and these items are saved at some model.</p>
  
  <p>For this, I have written this view and form:</p>
  
  <p><strong>form:</strong></p>
  
  <pre><code>IMPORT_FILE_TYPES = ['.xls', ]
  
  class XlsInputForm(forms.Form):
      input_excel = forms.FileField(required= True, label= u"Upload the Excel file to import to the system.")
  
      def clean_input_excel(self):
          input_excel = self.cleaned_data['input_excel']
          extension = os.path.splitext( input_excel.name )[1]
          if not (extension in IMPORT_FILE_TYPES):
              raise forms.ValidationError( u'%s is not a valid excel file. Please make sure your input file is an excel file (Excel 2007 is NOT supported.' % extension )
          else:
              return input_excel
  </code></pre>
  
  <p><strong>view:</strong></p>
  
  <pre><code>def import_excel_view(request):
      if request.method == 'POST':
          form = XlsInputForm(request.POST, request.FILES)
          if form.is_valid():
              input_excel = request.FILES['input_excel']
              # I need to open this input_excel with input_excel.open_workbook()
              return render_to_response('import_excel.html', {'rows': rows})
      else:
          form = XlsInputForm()
  
      return render_to_response('import_excel.html', {'form': form})
  </code></pre>
  
  <p>As you can see at the <code># I need to open this input_excel with input_excel.open_workbook()</code> I need to read from memory but <code>open_workbook</code> reads from a file, without saving this input to somewhere, how can I read it ?</p>