IPython

IPython - An interactive computing environment for Python
IPython can be used as a replacement for the standard Python shell, or it
can be used as a complete working environment for scientific computing
(like Matlab or Mathematica) when paired with the standard Python scientific
and numerical tools. It supports dynamic object introspections, numbered
input/output prompts, a macro system, session logging, session restoring,
complete system shell access, verbose and colored traceback reports,
auto-parentheses, auto-quoting, and is embeddable in other Python programs.