One cross-cutting concern in some exploratory data analysis applications is how to handle numeric values that are missing or cannot be parsed. We often have a mixture of float, int, and Decimal currency values that we'd like to process with some consistency.
In other contexts, we have not applicable or not available data values that shouldn't interfere with the main thread of the calculation. It's often handy to allow the Not Applicable values to pass through an expression without raising an exception. We'll focus on three bad-data conversion functions: bd_int(), bd_float(), and bd_decimal(). The composite feature we're adding will be defined before the built-in conversion function.
Here's a simple bad-data decorator: ...
