stephenmcd/cartridge — pull request #219 by kulbir (2014-11-27 12:14:14+00:00)
Title: Added string format method. #218

Added the string format method. The issue #218 is resolved using following code.
```
'x_exp_date': '{month}/{year}'.format(month=data['card_expiry_month'],
year=data['card_expiry_year']),
```