When i am trying to extract the data from an xlsx files. I get the encoding details with the data as well. 

Consider the code as shown below,

```
column_number = 0
column_headers = []
#column_headers = sheet.row_values(row_number)
while column_number <= sheet.ncols - 1:
    column_headers.append(sheet.cell(row_number, column_number).value)
    column_number+=1

return column_headers

```

output is,

```
[u'Rec#', u'Cyc#', u'Step', u'TestTime', u'StepTime', u'Amp-hr', u'Watt-hr', u'Amps', u'Volts', u'State', u'ES', u'DPt Time', u'ACR', u'DCIR']

```

I just want to extract the cell value which is the data without "u'" attached to it . How can i get just that ?