The REPL

This is an extension for ipython.

It's goal is to make iterative "image-based" development possible. This way of development is able to increase programmer's productivity.

Features

• A command %in <module-name> allowing to switch current namespace to a given python module.
• When you are in the module's namespace, all evals will change this module.
• When a function gets redefined in the module, it also will be redefined in all other modules where it was imported to.
• The same is for classes.
• But also all objects of a redefined class will be upgraded, to use a new class.
• This should works (I hope) for parent classes, which are intermediate in the MRO chain.
• Also, a command %listen is available. It starts a simple RPC server allowing you to send functions and classes right from the Emacs (this is the only one IDE currently supported.

How to use

• Install: pip install therepl.
• Run ipython.
• Load the extension: %load_ext therepl.
• Switch to a module you want with %in <the-module> magic command.

• Eval the code like you want to change:

  

Connecting from the Emacs

• In ipython's repl execute %listen command.
• Load into your emacs therepl.el.
• With cursor on a function definition, hit C-c C-c to eval it in the ipython. Code will be evaled in the module corresponding to the python file.
• To switch REPL into the module of the current file, hit C-c v.

Development

To start hacking the repl itself:

• install poetry package manager.
• do poetry install in the repl's folder.
• do poetry shell and start the ipython.

Roadmap

• Make a emacs minor mode.
• Add proper error handling in RPC protocol.
• Create an extension for PyCharm.