scikit-learn/scikit-learn — pull request #2561 by schwarty (2013-10-30 13:24:19+00:00)
Title: MRG: extend Pipeline transform and inverse_transform behavior

Pipeline transform and inverse_transform skip last step if it lacks corresponding methods.

The extension is useful to:
- extract the features before the last step of the pipeline for debugging purposes
- inverse_transform the `coef_` attribute of a linear classifier for example