I'm trying to covert a coordinate value in excel to a row number and column number in openpyxl.

For example if my cell coordinate is D4 I want to find the corresponding row and column numbers to use for future operations, in the case row = 3, column = 3. I can get the row number easily using ws.cell('D4').row which returns 4 then it's just a matter of subtracting 1. But a similar argument ws.cell('D4').column returns D and I don't know how to easily get this into int form for subsequent operations. So I turn to you wise folks of stackoverflow. Can you help me?

What you want is openpyxl.utils.coordinate_from_string() and openpyxl.utils.column_index_from_string()

from openpyxl.utils.cell import coordinate_from_string, column_index_from_string
xy = coordinate_from_string('A4') # returns ('A',4)
col = column_index_from_string(xy[0]) # returns 1
row = xy[1]