Openpyxl AttributeError - python-2.7

Question

I was running this file fine yesterday and now I'm getting an AttributeError when I tried running it today. Here is the code I'm trying to run:
from openpyxl import load_workbook
def read_in():
wb = load_workbook('GenerateModel.xlsx')
ws = wb.get_sheet_by_name('Sheet1')
da_name = []
for i in range(1, ws.max_row+1):
if ws.cell(row=i,column=3).value != None and (
ws.cell(row=i,column=3).value != u'DA Name'):
da_name.append(ws.cell(row=i,column=3).value.encode('ascii'))
start_date = ws.cell(row=4, column=4).value
end_date = ws.cell(row=4, column=5).value
if start_date == None or end_date == None:
raise ValueError('Date cannot be left blank')
if start_date > end_date:
raise ValueError('Start Date must be less than End Date')
And here is the error that I get:
line 28, in read_in
for i in range(1, ws.max_row+1):
AttributeError: 'Worksheet' object has no attribute 'max_row'
I tried running another python script and I'm getting an ImportError that says
from openpyxl.styles import PatternFill
ImportError: cannot import name PatternFill
This makes me think that there is something wrong with the openpyxl module. I installed it using pip and I'm using the Spyder IDE. Thanks for the help.

Answer 1

It says '1.8.5'
Your openpyxl version is seriously outdated - hence the absence of max_row attribute on a WorkSheet class.
You need to figure out what Python executable is used when you run your script from the Spyder IDE and then update openpyxl in that environment:
pip install --upgrade openpyxl
(currently latest openpyxl is 2.4.8)