ImportError: Cannot Import Name Signature

I am tying to modify the original sklearn.CalibrationCV to create my won version. The original code has 'from .utils.fixes import signature'. So I did the following in my version:

Solution 1:

• In python 2, the inspect module does not have a signature method.
• In python 3, the inspect module does have a signature method.

This code is just trying to work with both python 2 and 3.

You may want to use the funcsigs module if you are using python 2, or use sklearn.externals.funcsigs directly (for version sklearn >= 0.17).

Solution 2:

The accepted answer doesn't work with the latest version of sklearn.

Please install funcsigs directly using

pip install funcsigs

and use from funcsigs import signature instead.