Usage example:

file_name = "example-cert.pem"
CN = 'localhost'
O = 'XYZ Widgets Inc'
OU = 'IT Department'
L = 'Seattle'
ST = 'Washington'
C = 'US'
emailAddress = 'e@example.com'

os.chdir(sys.path[0])
create_self_signed_cert(file_name, CN, O, OU, L, ST, C, emailAddress);
sys.exit(0)