Calculating the Implied Volatility of a Put Option Using Python

In answer to a question, I wanted to show how to calculate the implied volatility of a put option. The code I had used previously was only for a call. I want to emphasize that the method used here is much more general than just a tool to calculate volatility and so before moving on to puts, I show how to modify the code for a function I made up on the spot.

[dilip]

Do u code for others?
Im building a platform an need help on the payoff and Greeks coding

[robinferguson]

What fields in the call implied volatility excel would I need to change for the put implied volatility?