Reading and analyzing data from Excel sheets using pywin32

Question

I've seen plenty of examples on how to write to excel, and my program requires reading from existing data. I need to read through a column and pick out numbers from it (the column is empty cells with numbers at arbitrary intervals), and then break out when I reach the end of the data. The code I have now is below, where xlsht is the sheet name, x and y are the cell indices, and address is the list all the numbers are going.

while y < xlsht.UsedRange:
    if str(xlsht.Cells(x,y).Value).isdigit:
        address.append(xlsht.Cells(x,y).Value)
        y += 1
        continue
    else:
        y += 1
return address

As it stands now, it crashes at line 2. I tried using

if xlsht.Cells(x,y).Value not None:

but that didn't work. I dont know how else to do this. Also, I wanted to verify that using

xlsht.UsedRange 

is the correct way of detecting the last row of the sheet.

Answer 1

The error message doesn't give any useful clues what the problem might be.

Soltuion: Poor man's debugger. Print all and any variables so you can see what is going on:

print 'xlsht=',xlsht
print 'x=',x
print 'usedRange=',xlsht.UsedRange
while y < xlsht.UsedRange:
    print 'y=',y
    print 'cell=',xlsht.Cells(x,y)
    print 'value=',xlsht.Cells(x,y).Value
    if str(xlsht.Cells(x,y).Value).isdigit:
        address.append(xlsht.Cells(x,y).Value)
        y += 1
        continue
    else:
        y += 1
return address

You get the idea. If you're using Python 3.x, you'll need print('x=',repr(x))