This example demonstrates a Python helper function for logging during pandas DataFrame method chaining. The code defines `csnap`, which accepts a DataFrame, an optional function (defaulting to `lambda x: x.shape`), and an optional message, then prints the message and logs the function’s result via the `logging` module. It writes debug output to `mylog.log` using a `FileHandler` with a timestamped formatter, and returns the original DataFrame unchanged to preserve chaining. The snippet shows a debugging utility rather than a visual plot, relying on Python’s standard `logging` API.