TypeError: unsupported type for timedelta days component: unicode

[kath]

Hi,

the following shows the contents of "datebook.xls"

Date
8/9/2006
8/9/2006
8/9/2006
8/9/2006
8/9/2006

# read_date.py
import xlrd

book = xlrd.open_workbook("datebook.xls")
sh = book.sheet_by_index(0)
ex_qdate=sh.cell_value(rowx=1,colx=0)
pyd=datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=1,colx=0))
print pyd

for c in range(sh.ncols):
    for r in range(sh.nrows):
        print sh.cell_value(rowx=r,colx=c)
        print
datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=r,colx=c))

---- Output ----
>>>
2006-08-11
Date
Traceback (most recent call last):
  File "D:/Python23/Testing area/Python and Excel/read_date.py", line
12, in ?
    print
datetime.date(1900,1,1)+datetime.timedelta(days=sh.cell_value(rowx=r,colx=c))
TypeError: unsupported type for timedelta days component: unicode
>>>

The first print statement gives me desired output. Whats wrong with
second print statement?
When I give the discriptor or index explicitly its giving the correct
answer.
Why not in the loop?

Am I wrong some where?


Please help me.
Thank you,
Sudhir.