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;;; ipython.el --- Adds support for IPython to python-mode.el
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;; Copyright (C) 2002, 2003, 2004, 2005 Alexander Schmolck
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;; Author: Alexander Schmolck
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;; Keywords: ipython python languages oop
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;; URL: http://ipython.scipy.org
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;; Compatibility: Emacs21, XEmacs21
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;; FIXME: #$@! INPUT RING
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(defconst ipython-version "0.11"
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"Tied to IPython main version number.")
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;;; Commentary
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;; This library makes all the functionality python-mode has when running with
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;; the normal python-interpreter available for ipython, too. It also enables a
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;; persistent py-shell command history across sessions (if you exit python
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;; with C-d in py-shell) and defines the command `ipython-to-doctest', which
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;; can be used to convert bits of a ipython session into something that can be
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;; used for doctests. To install, put this file somewhere in your emacs
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;; `load-path' [1] and add the following line to your ~/.emacs file (the first
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;; line only needed if the default (``"ipython"``) is wrong)::
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;;
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;; (setq ipython-command "/SOME-PATH/ipython")
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;; (require 'ipython)
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;;
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;; Ipython will be set as the default python shell, but only if the ipython
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;; executable is in the path. For ipython sessions autocompletion with <tab>
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;; is also enabled (experimental feature!). Please also note that all the
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;; terminal functions in py-shell are handled by emacs's comint, **not** by
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;; (i)python, so importing readline etc. will have 0 effect.
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;;
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;; To start an interactive ipython session run `py-shell' with ``M-x py-shell``
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;; (or the default keybinding ``C-c C-!``).
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;;
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;; You can customize the arguments passed to the IPython instance at startup by
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;; setting the ``py-python-command-args`` variable. For example, to start
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;; always in ``pylab`` mode with hardcoded light-background colors, you can
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;; use::
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;;
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;; (setq py-python-command-args '("-pylab" "--colors" "LightBG"))
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;;
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;;
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;; NOTE: This mode is currently somewhat alpha and although I hope that it
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;; will work fine for most cases, doing certain things (like the
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;; autocompletion and a decent scheme to switch between python interpreters)
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;; properly will also require changes to ipython that will likely have to wait
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;; for a larger rewrite scheduled some time in the future.
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;;
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;;
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;; Further note that I don't know whether this runs under windows or not and
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;; that if it doesn't I can't really help much, not being afflicted myself.
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;;
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;;
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;; Hints for effective usage
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;; -------------------------
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;;
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;; - IMO the best feature by far of the ipython/emacs combo is how much easier
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;; it makes it to find and fix bugs thanks to the ``%pdb on or %debug``/
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;; pdbtrack combo. Try it: first in the ipython to shell do ``%pdb on`` then
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;; do something that will raise an exception (FIXME nice example), or type
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;; ``%debug`` after the exception has been raised. YOu'll be amazed at how
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;; easy it is to inspect the live objects in each stack frames and to jump to
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;; the corresponding sourcecode locations as you walk up and down the stack
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;; trace (even without ``%pdb on`` you can always use ``C-c -``
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;; (`py-up-exception') to jump to the corresponding source code locations).
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;;
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;; - emacs gives you much more powerful commandline editing and output searching
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;; capabilities than ipython-standalone -- isearch is your friend if you
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;; quickly want to print 'DEBUG ...' to stdout out etc.
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;;
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;; - This is not really specific to ipython, but for more convenient history
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;; access you might want to add something like the following to *the beggining*
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;; of your ``.emacs`` (if you want behavior that's more similar to stand-alone
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;; ipython, you can change ``meta p`` etc. for ``control p``)::
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;;
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;; (require 'comint)
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;; (define-key comint-mode-map [(meta p)]
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;; 'comint-previous-matching-input-from-input)
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;; (define-key comint-mode-map [(meta n)]
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;; 'comint-next-matching-input-from-input)
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;; (define-key comint-mode-map [(control meta n)]
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;; 'comint-next-input)
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;; (define-key comint-mode-map [(control meta p)]
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;; 'comint-previous-input)
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;;
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;; - Be aware that if you customize py-python-command previously, this value
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;; will override what ipython.el does (because loading the customization
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;; variables comes later).
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;;
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;; Please send comments and feedback to the ipython-list
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;; (<ipython-user@scipy.org>) where I (a.s.) or someone else will try to
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;; answer them (it helps if you specify your emacs version, OS etc;
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;; familiarity with <http://www.catb.org/~esr/faqs/smart-questions.html> might
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;; speed up things further).
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;;
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;; Footnotes:
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;;
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;; [1] If you don't know what `load-path' is, C-h v load-path will tell
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;; you; if required you can also add a new directory. So assuming that
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;; ipython.el resides in ~/el/, put this in your emacs:
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;;
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;;
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;; (add-to-list 'load-path "~/el")
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;; (setq ipython-command "/some-path/ipython")
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;; (require 'ipython)
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;;
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;;
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;;
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;;
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;; TODO:
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;; - do autocompletion properly
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;; - implement a proper switching between python interpreters
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;;
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;; BUGS:
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;; - neither::
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;;
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;; (py-shell "-c print 'FOOBAR'")
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;;
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;; nor::
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;;
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;; (let ((py-python-command-args (append py-python-command-args
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;; '("-c" "print 'FOOBAR'"))))
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;; (py-shell))
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;;
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;; seem to print anything as they should
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;;
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;; - look into init priority issues with `py-python-command' (if it's set
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;; via custom)
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;;; Code
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(require 'cl)
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(require 'shell)
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(require 'executable)
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(require 'ansi-color)
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(defcustom ipython-command "ipython"
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"*Shell command used to start ipython."
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:type 'string
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:group 'python)
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;; Users can set this to nil
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(defvar py-shell-initial-switch-buffers t
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"If nil, don't switch to the *Python* buffer on the first call to
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`py-shell'.")
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(defvar ipython-backup-of-py-python-command nil
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"HACK")
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(defvar ipython-de-input-prompt-regexp "\\(?:
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In \\[[0-9]+\\]: *.*
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----+> \\(.*
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\\)[\n]?\\)\\|\\(?:
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In \\[[0-9]+\\]: *\\(.*
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\\)\\)\\|^[ ]\\{3\\}[.]\\{3,\\}: *\\(.*
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\\)"
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"A regular expression to match the IPython input prompt and the python
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command after it. The first match group is for a command that is rewritten,
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the second for a 'normal' command, and the third for a multiline command.")
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(defvar ipython-de-output-prompt-regexp "^Out\\[[0-9]+\\]: "
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"A regular expression to match the output prompt of IPython.")
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(if (not (executable-find ipython-command))
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(message (format "Can't find executable %s - ipython.el *NOT* activated!!!"
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ipython-command))
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;; XXX load python-mode, so that we can screw around with its variables
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;; this has the disadvantage that python-mode is loaded even if no
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;; python-file is ever edited etc. but it means that `py-shell' works
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;; without loading a python-file first. Obviously screwing around with
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;; python-mode's variables like this is a mess, but well.
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(require 'python-mode)
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;; turn on ansi colors for ipython and activate completion
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(defun ipython-shell-hook ()
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;; the following is to synchronize dir-changes
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(make-local-variable 'shell-dirstack)
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(setq shell-dirstack nil)
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(make-local-variable 'shell-last-dir)
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(setq shell-last-dir nil)
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(make-local-variable 'shell-dirtrackp)
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(setq shell-dirtrackp t)
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(add-hook 'comint-input-filter-functions 'shell-directory-tracker nil t)
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(ansi-color-for-comint-mode-on)
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(define-key py-shell-map [tab] 'ipython-complete)
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;; Add this so that tab-completion works both in X11 frames and inside
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;; terminals (such as when emacs is called with -nw).
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(define-key py-shell-map "\t" 'ipython-complete)
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;;XXX this is really just a cheap hack, it only completes symbols in the
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;;interactive session -- useful nonetheless.
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(define-key py-mode-map [(meta tab)] 'ipython-complete)
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)
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(add-hook 'py-shell-hook 'ipython-shell-hook)
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;; Regular expression that describes tracebacks for IPython in context and
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;; verbose mode.
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;;Adapt python-mode settings for ipython.
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;; (this works for %xmode 'verbose' or 'context')
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;; XXX putative regexps for syntax errors; unfortunately the
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;; current python-mode traceback-line-re scheme is too primitive,
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;; so it's either matching syntax errors, *or* everything else
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;; (XXX: should ask Fernando for a change)
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;;"^ File \"\\(.*?\\)\", line \\([0-9]+\\).*\n.*\n.*\nSyntaxError:"
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;;^ File \"\\(.*?\\)\", line \\([0-9]+\\)"
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(setq py-traceback-line-re
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"\\(^[^\t >].+?\\.py\\).*\n +[0-9]+[^\00]*?\n-+> \\([0-9]+\\)+")
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;; Recognize the ipython pdb, whose prompt is 'ipdb>' or 'ipydb>'
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;;instead of '(Pdb)'
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(setq py-pdbtrack-input-prompt "\n[(<]*[Ii]?[Pp]y?db[>)]+ ")
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(setq pydb-pydbtrack-input-prompt "\n[(]*ipydb[>)]+ ")
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(setq py-shell-input-prompt-1-regexp "^In \\[[0-9]+\\]: *"
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py-shell-input-prompt-2-regexp "^ [.][.][.]+: *" )
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;; select a suitable color-scheme
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(unless (member "--colors" py-python-command-args)
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(setq py-python-command-args
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(nconc py-python-command-args
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(list "--colors"
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(cond
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((eq frame-background-mode 'dark)
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"Linux")
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((eq frame-background-mode 'light)
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"LightBG")
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(t ; default (backg-mode isn't always set by XEmacs)
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"LightBG"))))))
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(unless (equal ipython-backup-of-py-python-command py-python-command)
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(setq ipython-backup-of-py-python-command py-python-command))
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(setq py-python-command ipython-command))
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;; MODIFY py-shell so that it loads the editing history
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(defadvice py-shell (around py-shell-with-history)
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"Add persistent command-history support (in
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$PYTHONHISTORY (or \"~/.ipython/history\", if we use IPython)). Also, if
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`py-shell-initial-switch-buffers' is nil, it only switches to *Python* if that
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buffer already exists."
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(if (comint-check-proc "*Python*")
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ad-do-it
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(setq comint-input-ring-file-name
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(if (string-equal py-python-command ipython-command)
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(concat (or (getenv "IPYTHONDIR") "~/.ipython") "/history")
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(or (getenv "PYTHONHISTORY") "~/.python-history.py")))
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(comint-read-input-ring t)
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(let ((buf (current-buffer)))
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ad-do-it
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(unless py-shell-initial-switch-buffers
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(switch-to-buffer-other-window buf)))))
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(ad-activate 'py-shell)
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;; (defadvice py-execute-region (before py-execute-buffer-ensure-process)
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;; "HACK: test that ipython is already running before executing something.
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;; Doing this properly seems not worth the bother (unless people actually
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;; request it)."
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;; (unless (comint-check-proc "*Python*")
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;; (error "Sorry you have to first do M-x py-shell to send something to ipython.")))
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;; (ad-activate 'py-execute-region)
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(defadvice py-execute-region (around py-execute-buffer-ensure-process)
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"HACK: if `py-shell' is not active or ASYNC is explicitly desired, fall back
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to python instead of ipython."
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(let ((py-which-shell (if (and (comint-check-proc "*Python*") (not async))
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py-python-command
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ipython-backup-of-py-python-command)))
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ad-do-it))
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(ad-activate 'py-execute-region)
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(defun ipython-to-doctest (start end)
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"Transform a cut-and-pasted bit from an IPython session into something that
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looks like it came from a normal interactive python session, so that it can
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be used in doctests. Example:
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In [1]: import sys
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In [2]: sys.stdout.write 'Hi!\n'
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------> sys.stdout.write ('Hi!\n')
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Hi!
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In [3]: 3 + 4
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Out[3]: 7
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gets converted to:
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>>> import sys
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>>> sys.stdout.write ('Hi!\n')
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Hi!
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>>> 3 + 4
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7
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"
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(interactive "*r\n")
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;(message (format "###DEBUG s:%de:%d" start end))
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(save-excursion
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(save-match-data
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;; replace ``In [3]: bla`` with ``>>> bla`` and
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;; ``... : bla`` with ``... bla``
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(goto-char start)
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(while (re-search-forward ipython-de-input-prompt-regexp end t)
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;(message "finding 1")
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(cond ((match-string 3) ;continued
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(replace-match "... \\3" t nil))
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(t
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(replace-match ">>> \\1\\2" t nil))))
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;; replace ``
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(goto-char start)
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(while (re-search-forward ipython-de-output-prompt-regexp end t)
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(replace-match "" t nil)))))
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(defvar ipython-completion-command-string
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"print(';'.join(get_ipython().Completer.all_completions('%s'))) #PYTHON-MODE SILENT\n"
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"The string send to ipython to query for all possible completions")
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;; xemacs doesn't have `comint-preoutput-filter-functions' so we'll try the
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;; following wonderful hack to work around this case
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(if (featurep 'xemacs)
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;;xemacs
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(defun ipython-complete ()
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"Try to complete the python symbol before point. Only knows about the stuff
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in the current *Python* session."
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(interactive)
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(let* ((ugly-return nil)
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(sep ";")
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(python-process (or (get-buffer-process (current-buffer))
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;XXX hack for .py buffers
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(get-process py-which-bufname)))
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;; XXX currently we go backwards to find the beginning of an
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;; expression part; a more powerful approach in the future might be
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;; to let ipython have the complete line, so that context can be used
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;; to do things like filename completion etc.
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(beg (save-excursion (skip-chars-backward "a-z0-9A-Z_." (point-at-bol))
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(point)))
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(end (point))
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(pattern (buffer-substring-no-properties beg end))
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(completions nil)
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(completion-table nil)
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completion
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(comint-output-filter-functions
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(append comint-output-filter-functions
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'(ansi-color-filter-apply
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(lambda (string)
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;(message (format "DEBUG filtering: %s" string))
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(setq ugly-return (concat ugly-return string))
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(delete-region comint-last-output-start
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(process-mark (get-buffer-process (current-buffer)))))))))
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;(message (format "#DEBUG pattern: '%s'" pattern))
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(process-send-string python-process
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(format ipython-completion-command-string pattern))
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(accept-process-output python-process)
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;(message (format "DEBUG return: %s" ugly-return))
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(setq completions
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(split-string (substring ugly-return 0 (position ?\n ugly-return)) sep))
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(setq completion-table (loop for str in completions
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collect (list str nil)))
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(setq completion (try-completion pattern completion-table))
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(cond ((eq completion t))
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((null completion)
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(message "Can't find completion for \"%s\"" pattern)
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(ding))
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((not (string= pattern completion))
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(delete-region beg end)
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(insert completion))
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(t
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(message "Making completion list...")
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(with-output-to-temp-buffer "*Python Completions*"
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(display-completion-list (all-completions pattern completion-table)))
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(message "Making completion list...%s" "done")))))
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;; emacs
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(defun ipython-complete ()
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"Try to complete the python symbol before point. Only knows about the stuff
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in the current *Python* session."
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(interactive)
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(let* ((ugly-return nil)
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(sep ";")
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(python-process (or (get-buffer-process (current-buffer))
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;XXX hack for .py buffers
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(get-process py-which-bufname)))
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|
;; XXX currently we go backwards to find the beginning of an
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|
;; expression part; a more powerful approach in the future might be
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|
;; to let ipython have the complete line, so that context can be used
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|
;; to do things like filename completion etc.
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|
(beg (save-excursion (skip-chars-backward "a-z0-9A-Z_./" (point-at-bol))
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|
(point)))
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|
(end (point))
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|
(pattern (buffer-substring-no-properties beg end))
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|
(completions nil)
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|
(completion-table nil)
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|
completion
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(comint-preoutput-filter-functions
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|
(append comint-preoutput-filter-functions
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|
'(ansi-color-filter-apply
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|
(lambda (string)
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|
(setq ugly-return (concat ugly-return string))
|
|
|
"")))))
|
|
|
(process-send-string python-process
|
|
|
(format ipython-completion-command-string pattern))
|
|
|
(accept-process-output python-process)
|
|
|
(setq completions
|
|
|
(split-string (substring ugly-return 0 (position ?\n ugly-return)) sep))
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|
|
;(message (format "DEBUG completions: %S" completions))
|
|
|
(setq completion-table (loop for str in completions
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|
|
collect (list str nil)))
|
|
|
(setq completion (try-completion pattern completion-table))
|
|
|
(cond ((eq completion t))
|
|
|
((null completion)
|
|
|
(message "Can't find completion for \"%s\"" pattern)
|
|
|
(ding))
|
|
|
((not (string= pattern completion))
|
|
|
(delete-region beg end)
|
|
|
(insert completion))
|
|
|
(t
|
|
|
(message "Making completion list...")
|
|
|
(with-output-to-temp-buffer "*IPython Completions*"
|
|
|
(display-completion-list (all-completions pattern completion-table)))
|
|
|
(message "Making completion list...%s" "done")))))
|
|
|
)
|
|
|
|
|
|
;;; autoindent support: patch sent in by Jin Liu <m.liu.jin@gmail.com>,
|
|
|
;;; originally written by doxgen@newsmth.net
|
|
|
;;; Minor modifications by fperez for xemacs compatibility.
|
|
|
|
|
|
(defvar ipython-autoindent t
|
|
|
"If non-nil, enable autoindent for IPython shell through python-mode.")
|
|
|
|
|
|
(defvar ipython-indenting-buffer-name "*IPython Indentation Calculation*"
|
|
|
"Temporary buffer for indenting multiline statement.")
|
|
|
|
|
|
(defun ipython-get-indenting-buffer ()
|
|
|
"Return a temporary buffer set in python-mode. Create one if necessary."
|
|
|
(let ((buf (get-buffer-create ipython-indenting-buffer-name)))
|
|
|
(set-buffer buf)
|
|
|
(unless (eq major-mode 'python-mode)
|
|
|
(python-mode))
|
|
|
buf))
|
|
|
|
|
|
(defvar ipython-indentation-string nil
|
|
|
"Indentation for the next line in a multiline statement.")
|
|
|
|
|
|
(defun ipython-send-and-indent ()
|
|
|
"Send the current line to IPython, and calculate the indentation for
|
|
|
the next line."
|
|
|
(interactive)
|
|
|
(if ipython-autoindent
|
|
|
(let ((line (buffer-substring (point-at-bol) (point)))
|
|
|
(after-prompt1)
|
|
|
(after-prompt2))
|
|
|
(save-excursion
|
|
|
(comint-bol t)
|
|
|
(if (looking-at py-shell-input-prompt-1-regexp)
|
|
|
(setq after-prompt1 t)
|
|
|
(setq after-prompt2 (looking-at py-shell-input-prompt-2-regexp)))
|
|
|
(with-current-buffer (ipython-get-indenting-buffer)
|
|
|
(when after-prompt1
|
|
|
(erase-buffer))
|
|
|
(when (or after-prompt1 after-prompt2)
|
|
|
(delete-region (point-at-bol) (point))
|
|
|
(insert line)
|
|
|
(newline-and-indent))))))
|
|
|
;; send input line to ipython interpreter
|
|
|
(comint-send-input))
|
|
|
|
|
|
(defun ipython-indentation-hook (string)
|
|
|
"Insert indentation string if py-shell-input-prompt-2-regexp
|
|
|
matches last process output."
|
|
|
(let* ((start-marker (or comint-last-output-start
|
|
|
(point-min-marker)))
|
|
|
(end-marker (process-mark (get-buffer-process (current-buffer))))
|
|
|
(text (ansi-color-filter-apply (buffer-substring start-marker end-marker))))
|
|
|
;; XXX if `text' matches both pattern, it MUST be the last prompt-2
|
|
|
(when (and (string-match py-shell-input-prompt-2-regexp text)
|
|
|
(not (string-match "\n$" text)))
|
|
|
(with-current-buffer (ipython-get-indenting-buffer)
|
|
|
(setq ipython-indentation-string
|
|
|
(buffer-substring (point-at-bol) (point))))
|
|
|
(goto-char end-marker)
|
|
|
(insert ipython-indentation-string)
|
|
|
(setq ipython-indentation-string nil))))
|
|
|
|
|
|
(add-hook 'py-shell-hook
|
|
|
(lambda ()
|
|
|
(add-hook 'comint-output-filter-functions
|
|
|
'ipython-indentation-hook)))
|
|
|
|
|
|
(define-key py-shell-map (kbd "RET") 'ipython-send-and-indent)
|
|
|
;;; / end autoindent support
|
|
|
|
|
|
(provide 'ipython)
|
|
|
|
