使用openpyxl基于文本进行条件格式化

Question

I have a spreadsheet that I am generating with openpyxl that contains a number of system checks. Based on the rules; the words Pass, Fail or Informational are inserted into Column E in my spreadsheet. I would like to use Openpyxl to conditionally format the fill of the spreadsheet based on the value of Pass or Fail. Something like Green for Pass and Red for Fail.

My current code for openpyxl is:

wb = Workbook()
ws = wb.active
ws.freeze_panes = ws.cell('A3') 
ws.title = 'Best Practice Report for XXX'
ws['A1'] = 'Best Practice Report for XXX %s' % curdate
ws['A2'] = 'IP Address/FQDN'
ws['B2'] = 'BP Number'
ws['C2'] = 'Title'
ws['D2'] = 'Priority'
ws['E2'] = 'Status'
ws['F2'] = 'Description'
a1 = ws['A1']
a1.font = Font(size=20)
redFill = PatternFill(start_color='FFEE1111', end_color='FFEE1111', fill_type='solid')

ws.conditional_formatting.add('E4:E1000', FormatRule(text=['Fail'], stopIfTrue=True, fill=redFill))     
wb.save('bp--TESTresults.xlsx') 

My issue is with the conditional formatting rule, I cannot find any good examples for conditional formatting based on the text in a cell.

Update
Thanks to Charlie Clarks response I got this working. Created two rules as follows.

ws.conditional_formatting.add('E4:E1000', FormulaRule(formula=['NOT(ISERROR(SEARCH("Pass",E4)))'], stopIfTrue=True, fill=greenFill))    
ws.conditional_formatting.add('E4:E1000', FormulaRule(formula=['NOT(ISERROR(SEARCH("Fail",E4)))'], stopIfTrue=True, fill=redFill))

Answer 1

I just whipped up a file and did some introspection. It has values in A2:A5 I think this should help you along:

from openpyxl import load_workbook
wb = load_workbook("Issues/cf.xlsx")
ws = wb.active
ws.conditional_formatting.cf_rules
{'A2:A5': [<openpyxl.formatting.rule.Rule object at 0x108e6dfd0>]}
rule = _['A2:A5']
rule = rule[0]
rule.type
'containsText'
rule.formula
['NOT(ISERROR(SEARCH("fail",A2)))']
rule.stopIfTrue
None
rule.operator
'containsText'