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https://git.savannah.gnu.org/git/emacs/org-mode.git
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445 lines
16 KiB
EmacsLisp
445 lines
16 KiB
EmacsLisp
;;; ob-python.el --- Babel Functions for Python -*- lexical-binding: t; -*-
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;; Copyright (C) 2009-2021 Free Software Foundation, Inc.
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;; Authors: Eric Schulte
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;; Dan Davison
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;; Maintainer: Jack Kamm <jackkamm@gmail.com>
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;; Keywords: literate programming, reproducible research
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;; Homepage: https://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating python source code.
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;;; Code:
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(require 'ob)
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(require 'org-macs)
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(require 'python)
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(declare-function py-shell "ext:python-mode" (&rest args))
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(declare-function py-toggle-shells "ext:python-mode" (arg))
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(declare-function py-shell-send-string "ext:python-mode" (strg &optional process))
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("python" . "py"))
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(defvar org-babel-default-header-args:python '())
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(defcustom org-babel-python-command "python"
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"Name of the command for executing Python code."
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:version "24.4"
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:package-version '(Org . "8.0")
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:group 'org-babel
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:type 'string)
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(defcustom org-babel-python-mode
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(if (featurep 'python-mode) 'python-mode 'python)
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"Preferred python mode for use in running python interactively.
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This will typically be either `python' or `python-mode'."
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:group 'org-babel
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:version "24.4"
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:package-version '(Org . "8.0")
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:type 'symbol)
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(defcustom org-babel-python-hline-to "None"
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"Replace hlines in incoming tables with this when translating to python."
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:group 'org-babel
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:version "24.4"
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:package-version '(Org . "8.0")
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:type 'string)
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(defcustom org-babel-python-None-to 'hline
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"Replace `None' in python tables with this before returning."
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:group 'org-babel
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:version "24.4"
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:package-version '(Org . "8.0")
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:type 'symbol)
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(defun org-babel-execute:python (body params)
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"Execute a block of Python code with Babel.
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This function is called by `org-babel-execute-src-block'."
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(let* ((org-babel-python-command
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(or (cdr (assq :python params))
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org-babel-python-command))
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(session (org-babel-python-initiate-session
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(cdr (assq :session params))))
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(result-params (cdr (assq :result-params params)))
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(result-type (cdr (assq :result-type params)))
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(return-val (when (eq result-type 'value)
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(cdr (assq :return params))))
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(preamble (cdr (assq :preamble params)))
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(async (org-babel-comint-use-async params))
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(full-body
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(concat
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(org-babel-expand-body:generic
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body params
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(org-babel-variable-assignments:python params))
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(when return-val
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(format (if session "\n%s" "\nreturn %s") return-val))))
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(result (org-babel-python-evaluate
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session full-body result-type
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result-params preamble async)))
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(org-babel-reassemble-table
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result
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(org-babel-pick-name (cdr (assq :colname-names params))
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(cdr (assq :colnames params)))
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(org-babel-pick-name (cdr (assq :rowname-names params))
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(cdr (assq :rownames params))))))
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(defun org-babel-prep-session:python (session params)
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"Prepare SESSION according to the header arguments in PARAMS.
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VARS contains resolved variable references."
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(let* ((session (org-babel-python-initiate-session session))
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(var-lines
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(org-babel-variable-assignments:python params)))
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(org-babel-comint-in-buffer session
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(mapc (lambda (var)
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(end-of-line 1) (insert var) (comint-send-input)
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(org-babel-comint-wait-for-output session))
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var-lines))
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session))
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(defun org-babel-load-session:python (session body params)
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"Load BODY into SESSION."
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(save-window-excursion
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(let ((buffer (org-babel-prep-session:python session params)))
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(with-current-buffer buffer
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(goto-char (process-mark (get-buffer-process (current-buffer))))
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(insert (org-babel-chomp body)))
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buffer)))
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;; helper functions
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(defun org-babel-variable-assignments:python (params)
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"Return a list of Python statements assigning the block's variables."
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(mapcar
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(lambda (pair)
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(format "%s=%s"
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(car pair)
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(org-babel-python-var-to-python (cdr pair))))
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(org-babel--get-vars params)))
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(defun org-babel-python-var-to-python (var)
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"Convert an elisp value to a python variable.
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Convert an elisp value, VAR, into a string of python source code
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specifying a variable of the same value."
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(if (listp var)
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(concat "[" (mapconcat #'org-babel-python-var-to-python var ", ") "]")
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(if (eq var 'hline)
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org-babel-python-hline-to
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(format
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(if (and (stringp var) (string-match "[\n\r]" var)) "\"\"%S\"\"" "%S")
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(if (stringp var) (substring-no-properties var) var)))))
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(defun org-babel-python-table-or-string (results)
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"Convert RESULTS into an appropriate elisp value.
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If the results look like a list or tuple, then convert them into an
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Emacs-lisp table, otherwise return the results as a string."
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(let ((res (org-babel-script-escape results)))
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(if (listp res)
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(mapcar (lambda (el) (if (eq el 'None)
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org-babel-python-None-to el))
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res)
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res)))
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(defvar org-babel-python-buffers '((:default . "*Python*")))
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(defun org-babel-python-session-buffer (session)
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"Return the buffer associated with SESSION."
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(cdr (assoc session org-babel-python-buffers)))
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(defun org-babel-python-with-earmuffs (session)
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(let ((name (if (stringp session) session (format "%s" session))))
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(if (and (string= "*" (substring name 0 1))
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(string= "*" (substring name (- (length name) 1))))
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name
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(format "*%s*" name))))
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(defun org-babel-python-without-earmuffs (session)
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(let ((name (if (stringp session) session (format "%s" session))))
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(if (and (string= "*" (substring name 0 1))
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(string= "*" (substring name (- (length name) 1))))
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(substring name 1 (- (length name) 1))
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name)))
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(defvar py-default-interpreter)
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(defvar py-which-bufname)
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(defvar python-shell-buffer-name)
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(defun org-babel-python-initiate-session-by-key (&optional session)
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"Initiate a python session.
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If there is not a current inferior-process-buffer in SESSION
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then create. Return the initialized session."
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(save-window-excursion
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(let* ((session (if session (intern session) :default))
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(py-buffer (org-babel-python-session-buffer session))
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(cmd (if (member system-type '(cygwin windows-nt ms-dos))
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(concat org-babel-python-command " -i")
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org-babel-python-command)))
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(cond
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((eq 'python org-babel-python-mode) ; python.el
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(unless py-buffer
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(setq py-buffer (org-babel-python-with-earmuffs session)))
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(let ((python-shell-buffer-name
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(org-babel-python-without-earmuffs py-buffer)))
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(run-python cmd)
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(sleep-for 0 10)))
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((and (eq 'python-mode org-babel-python-mode)
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(fboundp 'py-shell)) ; python-mode.el
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(require 'python-mode)
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;; Make sure that py-which-bufname is initialized, as otherwise
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;; it will be overwritten the first time a Python buffer is
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;; created.
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(py-toggle-shells py-default-interpreter)
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;; `py-shell' creates a buffer whose name is the value of
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;; `py-which-bufname' with '*'s at the beginning and end
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(let* ((bufname (if (and py-buffer (buffer-live-p py-buffer))
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(replace-regexp-in-string ;; zap surrounding *
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"^\\*\\([^*]+\\)\\*$" "\\1" py-buffer)
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(concat "Python-" (symbol-name session))))
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(py-which-bufname bufname))
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(setq py-buffer (org-babel-python-with-earmuffs bufname))
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(py-shell nil nil t org-babel-python-command py-buffer nil nil t nil)))
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(t
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(error "No function available for running an inferior Python")))
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(setq org-babel-python-buffers
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(cons (cons session py-buffer)
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(assq-delete-all session org-babel-python-buffers)))
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session)))
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(defun org-babel-python-initiate-session (&optional session _params)
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"Create a session named SESSION according to PARAMS."
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(unless (string= session "none")
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(org-babel-python-session-buffer
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(org-babel-python-initiate-session-by-key session))))
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(defvar org-babel-python-eoe-indicator "org_babel_python_eoe"
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"A string to indicate that evaluation has completed.")
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(defconst org-babel-python-wrapper-method
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"
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def main():
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%s
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open('%s', 'w').write( str(main()) )")
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(defconst org-babel-python-pp-wrapper-method
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"
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import pprint
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def main():
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%s
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open('%s', 'w').write( pprint.pformat(main()) )")
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(defconst org-babel-python--exec-tmpfile "\
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with open('%s') as __org_babel_python_tmpfile:
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exec(compile(__org_babel_python_tmpfile.read(), __org_babel_python_tmpfile.name, 'exec'))"
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"Template for Python session command with output results.
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Has a single %s escape, the tempfile containing the source code
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to evaluate.")
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(defun org-babel-python-format-session-value
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(src-file result-file result-params)
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"Return Python code to evaluate SRC-FILE and write result to RESULT-FILE."
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(format "\
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import ast
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with open('%s') as __org_babel_python_tmpfile:
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__org_babel_python_ast = ast.parse(__org_babel_python_tmpfile.read())
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__org_babel_python_final = __org_babel_python_ast.body[-1]
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if isinstance(__org_babel_python_final, ast.Expr):
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__org_babel_python_ast.body = __org_babel_python_ast.body[:-1]
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exec(compile(__org_babel_python_ast, '<string>', 'exec'))
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__org_babel_python_final = eval(compile(ast.Expression(
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__org_babel_python_final.value), '<string>', 'eval'))
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with open('%s', 'w') as __org_babel_python_tmpfile:
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if %s:
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import pprint
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__org_babel_python_tmpfile.write(pprint.pformat(__org_babel_python_final))
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else:
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__org_babel_python_tmpfile.write(str(__org_babel_python_final))
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else:
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exec(compile(__org_babel_python_ast, '<string>', 'exec'))
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__org_babel_python_final = None"
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(org-babel-process-file-name src-file 'noquote)
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(org-babel-process-file-name result-file 'noquote)
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(if (member "pp" result-params) "True" "False")))
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(defun org-babel-python-evaluate
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(session body &optional result-type result-params preamble async)
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"Evaluate BODY as Python code."
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(if session
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(if async
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(org-babel-python-async-evaluate-session
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session body result-type result-params)
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(org-babel-python-evaluate-session
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session body result-type result-params))
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(org-babel-python-evaluate-external-process
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body result-type result-params preamble)))
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(defun org-babel-python--shift-right (body &optional count)
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(with-temp-buffer
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(python-mode)
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(insert body)
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(goto-char (point-min))
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(while (not (eobp))
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(unless (python-syntax-context 'string)
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(python-indent-shift-right (line-beginning-position)
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(line-end-position)
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count))
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(forward-line 1))
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(buffer-string)))
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(defun org-babel-python-evaluate-external-process
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(body &optional result-type result-params preamble)
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"Evaluate BODY in external python process.
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If RESULT-TYPE equals `output' then return standard output as a
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string. If RESULT-TYPE equals `value' then return the value of the
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last statement in BODY, as elisp."
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(let ((raw
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(pcase result-type
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(`output (org-babel-eval org-babel-python-command
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(concat preamble (and preamble "\n")
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body)))
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(`value (let ((tmp-file (org-babel-temp-file "python-")))
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(org-babel-eval
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org-babel-python-command
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(concat
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preamble (and preamble "\n")
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(format
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(if (member "pp" result-params)
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org-babel-python-pp-wrapper-method
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org-babel-python-wrapper-method)
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(org-babel-python--shift-right body)
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(org-babel-process-file-name tmp-file 'noquote))))
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(org-babel-eval-read-file tmp-file))))))
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(org-babel-result-cond result-params
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raw
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(org-babel-python-table-or-string (org-trim raw)))))
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(defun org-babel-python--send-string (session body)
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"Pass BODY to the Python process in SESSION.
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Return output."
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(with-current-buffer session
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(let* ((string-buffer "")
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(comint-output-filter-functions
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(cons (lambda (text) (setq string-buffer
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(concat string-buffer text)))
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comint-output-filter-functions))
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(body (format "\
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try:
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%s
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except:
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raise
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finally:
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print('%s')"
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(org-babel-python--shift-right body 4)
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org-babel-python-eoe-indicator)))
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(if (not (eq 'python-mode org-babel-python-mode))
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(let ((python-shell-buffer-name
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(org-babel-python-without-earmuffs session)))
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(python-shell-send-string body))
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(require 'python-mode)
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(py-shell-send-string body (get-buffer-process session)))
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;; same as `python-shell-comint-end-of-output-p' in emacs-25.1+
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(while (not (string-match
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org-babel-python-eoe-indicator
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string-buffer))
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(accept-process-output (get-buffer-process (current-buffer))))
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(org-babel-chomp (substring string-buffer 0 (match-beginning 0))))))
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(defun org-babel-python-evaluate-session
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(session body &optional result-type result-params)
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"Pass BODY to the Python process in SESSION.
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If RESULT-TYPE equals `output' then return standard output as a
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string. If RESULT-TYPE equals `value' then return the value of the
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last statement in BODY, as elisp."
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(let* ((tmp-src-file (org-babel-temp-file "python-"))
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(results
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(progn
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(with-temp-file tmp-src-file (insert body))
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(pcase result-type
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(`output
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(let ((body (format org-babel-python--exec-tmpfile
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(org-babel-process-file-name
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tmp-src-file 'noquote))))
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(org-babel-python--send-string session body)))
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(`value
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(let* ((tmp-results-file (org-babel-temp-file "python-"))
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(body (org-babel-python-format-session-value
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tmp-src-file tmp-results-file result-params)))
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(org-babel-python--send-string session body)
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(sleep-for 0 10)
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(org-babel-eval-read-file tmp-results-file)))))))
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(org-babel-result-cond result-params
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results
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(org-babel-python-table-or-string results))))
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(defun org-babel-python-read-string (string)
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"Strip \\='s from around Python string."
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(if (and (string-prefix-p "'" string)
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(string-suffix-p "'" string))
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(substring string 1 -1)
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string))
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;; Async session eval
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(defconst org-babel-python-async-indicator "print ('ob_comint_async_python_%s_%s')")
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(defun org-babel-python-async-value-callback (params tmp-file)
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(let ((result-params (cdr (assq :result-params params)))
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(results (org-babel-eval-read-file tmp-file)))
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(org-babel-result-cond result-params
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results
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(org-babel-python-table-or-string results))))
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(defun org-babel-python-async-evaluate-session
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(session body &optional result-type result-params)
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"Asynchronously evaluate BODY in SESSION.
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Returns a placeholder string for insertion, to later be replaced
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by `org-babel-comint-async-filter'."
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(org-babel-comint-async-register
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session (current-buffer)
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"ob_comint_async_python_\\(.+\\)_\\(.+\\)"
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'org-babel-chomp 'org-babel-python-async-value-callback)
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(let ((python-shell-buffer-name (org-babel-python-without-earmuffs session)))
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(pcase result-type
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(`output
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(let ((uuid (md5 (number-to-string (random 100000000)))))
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(with-temp-buffer
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(insert (format org-babel-python-async-indicator "start" uuid))
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(insert "\n")
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(insert body)
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(insert "\n")
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(insert (format org-babel-python-async-indicator "end" uuid))
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(python-shell-send-buffer))
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uuid))
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(`value
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(let ((tmp-results-file (org-babel-temp-file "python-"))
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(tmp-src-file (org-babel-temp-file "python-")))
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(with-temp-file tmp-src-file (insert body))
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(with-temp-buffer
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(insert (org-babel-python-format-session-value tmp-src-file tmp-results-file result-params))
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(insert "\n")
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(insert (format org-babel-python-async-indicator "file" tmp-results-file))
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(python-shell-send-buffer))
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tmp-results-file)))))
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(provide 'ob-python)
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;;; ob-python.el ends here
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