问题
I've recently completed the installation instructions for Haskell, and have reached the final step where I run
ihaskell install
to install the IHaskell kernel into Jupyter. However at this point I'm stuck, with the error
Detected IPython, but could not parse version number.
ihaskell:
Ran commands:
which ipython
/usr/local/bin/ipython --version
which /usr/local/bin/ipython
Exception: ExitFailure 1
which makes no sense, since when I run those commands myself, I get a valid (and required) version number:
$ which ipython
/usr/local/bin/ipython
$ /usr/local/bin/ipython --version
4.0.0
$ which /usr/local/bin/ipython
/usr/local/bin/ipython
How do I proceed to install the IHaskell kernel into Jupyter?
回答1:
This is a (soon to be addressed) limitation of the current version of IHaskell, which only supports IPhython 3.0.
Stepping back to 3.0 with
pip uninstall ipython
pip uninstall jupyter_core
pip install ipython[notebook]==3.0
will resolve the problem until IHaskell is updated, at which point it will be safe to restore the current version of IPython with
pip install ipython[notebook] --upgrade
Note that stepping back to 3.0 will result in view visible differences, though the expected location of settings files will change.
来源：https://stackoverflow.com/questions/32074595/unable-to-install-ihaskel-kernel-into-jupyter-could-not-parse-version-number