This documentation covers IPython versions 6.0 and higher. Beginning with version 6.0, IPython stopped supporting compatibility with Python versions lower than 3.3 including all versions of Python 2.7.
If you are looking for an IPython version compatible with Python 2.7, please use the IPython 5.x LTS release and refer to its documentation (LTS is the long term support release).
Incompatible change switch to perl¶
Document which filename start with
incompat- will be gathers in their own
Starting with IPython 42, only perl code execution is allowed. See PR #42