How to change the color based on text in excel using Python?

Question

In Excel cell text will vary from Pass to Fail.I have to give background color green for Pass(pass/Passed/passed) and red for Fail(fail/Failed/failed) respectively. How to change the color based on text ?

My Script

import xlwt

workbook = xlwt.Workbook()
worksheet = workbook.add_sheet('Testing')
worksheet.write_merge(5, 5, 1, 1,'S.No')
worksheet.write_merge(5, 5, 2, 2,'Test Case Description')
worksheet.write_merge(5, 5, 3, 3,'Status')
worksheet.write_merge(5, 5, 4, 4,'Remarks')
worksheet.write_merge(6, 6, 1, 1,1)
worksheet.write_merge(7, 7, 1, 1,1)
worksheet.write_merge(6, 6, 2, 2,'Verify Transferring rate')
worksheet.write_merge(7, 7, 2, 2,'Verify Receiving rate')
worksheet.write_merge(6, 6, 3, 3,'Pass')
worksheet.write_merge(7, 7, 3, 3,'Fail')
workbook.save('testexcel.xls')

@Henry:

Modified code :

import xlwt
workbook = xlwt.Workbook()
worksheet = workbook.add_sheet('Status')

passed = xlwt.easyxf('back_color green')
failed = xlwt.easyxf('back_color red')


color = (passed if passorfail in ['pass','Passed','passed'] else
    (failed if passorfail in ['fail','Failed','failed'] else xlwt.easyxf()))

worksheet.write_merge(6, 6, 3, 3,passorfail, style = color)

workbook.save('passfail2.xls')
print "Completed"

And it's throwing error when execute ? How to resolve this error ?

Traceback (most recent call last):
  File "G:\airspan_eclipse\Excel_Gen\passfail2.py", line 5, in <module>
    passed = xlwt.easyxf('back_color green')
  File "C:\Python27\lib\site-packages\xlwt\Style.py", line 704, in easyxf
    field_sep=field_sep, line_sep=line_sep, intro_sep=intro_sep, esc_char=esc_char, debug=debug)
  File "C:\Python27\lib\site-packages\xlwt\Style.py", line 632, in _parse_strg_to_obj
    raise EasyXFCallerError('line %r should have exactly 1 "%c"' % (line, intro_sep))
xlwt.Style.EasyXFCallerError: line 'back_color green' should have exactly 1 ":"

Answer 1

You can create styles using easyxf and then pass them as arguments to your write method.

For example:

style_pass = xlwt.easyxf('pattern: pattern solid, fore_colour green;')
style_fail = xlwt.easyxf('pattern: pattern solid, fore_colour red;')
worksheet.write_merge(6, 6, 3, 3,'Pass', style=style_pass)
worksheet.write_merge(7, 7, 3, 3,'Fail', style=style_fail)

Answer 2

You'll need to put in a if statement to seperate pased on pass fail.

Then, you'll use that to make a color string, something like 'fore-colour grey25'. Look in Style.py for lists of all possible colors and options (github page: https://github.com/python-excel/xlwt/blob/master/xlwt/Style.py). Since red and green both work, and back_color also works, you can do:

passed = xlwt.easyxf('back_color green')
failed = xlwt.easyxf('back_color red')

color = (passed if passorfail in ['pass','Passed','passed'] else
    (failed if passorfail in ['fail','Failed','failed'] else xlwt.easyxf()))
worksheet.write_merge(6, 6, 3, 3,passorfail, style = color)