My failure this week was, due to an onset of laziness, to write code that produced output via a series of comma-separated values, rather than to use string formatting. This occurred on multiple occasions, suggesting the possibility that it might become a chronic problem. Fortunately, other participants in the MMOOC raised the bar by posting more Pythonic code. This reminded me that it only takes an additional minute to put in the necessary effort.
So, to celebrate, I plan to correct this problem by using string formatting next week.
But, since failure is a sure way to generate future success, I hope to fail in another respect next week, thereby setting the stage to make amends the following week. Any examples of how others have failed would be appreciated, as it would offer a menu of possibilities.