forked from mirrors/org-mode
577 lines
23 KiB
EmacsLisp
577 lines
23 KiB
EmacsLisp
;;; ob-python.el --- Babel Functions for Python -*- lexical-binding: t; -*-
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;; Copyright (C) 2009-2024 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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;; URL: 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 'org-macs)
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(org-assert-version)
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(require 'ob)
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(require 'org-macs)
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(require 'python)
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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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(defconst org-babel-header-args:python
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'((return . :any)
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(python . :any)
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(async . ((yes no))))
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"Python-specific header arguments.")
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(defcustom org-babel-python-command 'auto
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"Command (including arguments) for interactive and non-interactive Python code.
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When not `auto', it overrides `org-babel-python-command-session'
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and `org-babel-python-command-nonsession'."
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:package-version '(Org . "9.7")
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:group 'org-babel
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:type '(choice string (const auto)))
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(defcustom org-babel-python-command-session 'auto
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"Command (including arguments) for starting interactive Python sessions.
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If `auto' (the default), uses the values from
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`python-shell-interpreter' and `python-shell-interpreter-args'.
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If `org-babel-python-command' is set, then it overrides this
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option."
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:package-version '(Org . "9.7")
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:group 'org-babel
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:type '(choice string (const auto)))
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(defcustom org-babel-python-command-nonsession "python"
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"Command (including arguments) for executing non-interactive Python code.
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If `org-babel-python-command' is set, then it overrides this option."
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:package-version '(Org . "9.7")
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:group 'org-babel
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:type 'string)
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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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: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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:package-version '(Org . "8.0")
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:type 'symbol)
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(defun org-babel-python-associate-session (session)
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"Associate Python code buffer with an Python session.
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Make SESSION without earmuffs be the Python buffer name."
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(setq-local python-shell-buffer-name
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(org-babel-python-without-earmuffs session)))
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(defun org-babel-execute:python (body params)
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"Execute Python BODY according to PARAMS.
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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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(graphics-file (and (member "graphics" (assq :result-params params))
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(org-babel-graphical-output-file 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 graphics-file)))
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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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(defconst org-babel-python--output-graphics-wrapper "\
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import matplotlib.pyplot
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matplotlib.pyplot.gcf().clear()
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%s
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matplotlib.pyplot.savefig('%s')"
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"Format string for saving Python graphical output.
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Has two %s escapes, for the Python code to be evaluated, and the
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file to save the graphics to.")
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(defconst org-babel-python--def-format-value "\
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def __org_babel_python_format_value(result, result_file, result_params):
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with open(result_file, 'w') as f:
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if 'graphics' in result_params:
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result.savefig(result_file)
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elif 'pp' in result_params:
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import pprint
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f.write(pprint.pformat(result))
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elif 'list' in result_params and isinstance(result, dict):
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f.write(str(['{} :: {}'.format(k, v) for k, v in result.items()]))
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else:
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if not set(result_params).intersection(\
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['scalar', 'verbatim', 'raw']):
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def dict2table(res):
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if isinstance(res, dict):
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return [(k, dict2table(v)) for k, v in res.items()]
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elif isinstance(res, list) or isinstance(res, tuple):
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return [dict2table(x) for x in res]
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else:
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return res
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if 'table' in result_params:
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result = dict2table(result)
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try:
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import pandas
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except ImportError:
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pass
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else:
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if isinstance(result, pandas.DataFrame) and 'table' in result_params:
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result = [[result.index.name or ''] + list(result.columns)] + \
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[None] + [[i] + list(row) for i, row in result.iterrows()]
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elif isinstance(result, pandas.Series) and 'table' in result_params:
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result = list(result.items())
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try:
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import numpy
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except ImportError:
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pass
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else:
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if isinstance(result, numpy.ndarray):
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if 'table' in result_params:
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result = result.tolist()
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else:
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result = repr(result)
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f.write(str(result))"
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"Python function to format value result and save it to file.")
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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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The assignments are defined in PARAMS."
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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 (but not a dict), then
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convert them into an Emacs-lisp table. Otherwise return the
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results as a string."
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(let ((res (if (and (> (length results) 0)
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(string-equal "{" (substring results 0 1)))
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results ;don't covert dicts to elisp
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(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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"Return SESSION name as string, ensuring *...* around."
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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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"Return SESSION name as string, without *...* around."
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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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(defun org-babel-session-buffer:python (session &optional _)
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"Return session buffer name for SESSION."
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(or (org-babel-python-session-buffer session)
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(org-babel-python-with-earmuffs session)))
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(defun org-babel-python--python-util-comint-end-of-output-p ()
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"Return non-nil if the last prompt matches input prompt.
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Backport of `python-util-comint-end-of-output-p' to emacs28. To
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be removed after minimum supported version reaches emacs29."
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(when-let ((prompt (python-util-comint-last-prompt)))
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(python-shell-comint-end-of-output-p
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(buffer-substring-no-properties
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(car prompt) (cdr prompt)))))
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(defun org-babel-python--command (is-session)
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"Helper function to return the Python command.
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This checks `org-babel-python-command', and then
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`org-babel-python-command-session' (if IS-SESSION) or
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`org-babel-python-command-nonsession' (if not IS-SESSION). If
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IS-SESSION, this might return `nil', which means to use
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`python-shell-calculate-command'."
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(or (unless (eq org-babel-python-command 'auto)
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org-babel-python-command)
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(if is-session
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(unless (eq org-babel-python-command-session 'auto)
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org-babel-python-command-session)
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org-babel-python-command-nonsession)))
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(defvar-local org-babel-python--initialized nil
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"Flag used to mark that python session has been initialized.")
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(defun org-babel-python--setup-session ()
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"Babel Python session setup code, to be run once per session.
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Function should be run from within the Python session buffer.
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This is often run as a part of `python-shell-first-prompt-hook',
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unless the Python session was created outside Org."
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(python-shell-send-string-no-output org-babel-python--def-format-value)
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(setq-local org-babel-python--initialized t))
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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 matching
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SESSION then create it. If inferior process already
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exists (e.g. if it was manually started with `run-python'), make
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sure it's configured to work with ob-python. If session has
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already been configured as such, do nothing. Return the
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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-session-buffer:python session))
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(python-shell-buffer-name
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(org-babel-python-without-earmuffs py-buffer))
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(existing-session-p (comint-check-proc py-buffer))
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(cmd (org-babel-python--command t)))
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(if cmd
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(let* ((cmd-split (split-string-and-unquote cmd))
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(python-shell-interpreter (car cmd-split))
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(python-shell-interpreter-args
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(combine-and-quote-strings
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(append (cdr cmd-split)
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(when (member system-type
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'(cygwin windows-nt ms-dos))
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(list "-i"))))))
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(run-python))
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(run-python))
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(with-current-buffer py-buffer
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(if existing-session-p
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;; Session was created outside Org. Assume first prompt
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;; already happened; run session setup code directly
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(unless org-babel-python--initialized
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;; Ensure first prompt. Based on python-tests.el
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;; (`python-tests-shell-wait-for-prompt')
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(while (not (org-babel-python--python-util-comint-end-of-output-p))
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(sit-for 0.1))
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(org-babel-python--setup-session))
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;; Adding to `python-shell-first-prompt-hook' immediately
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;; after `run-python' should be safe from race conditions,
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;; because subprocess output only arrives when Emacs is
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;; waiting (see elisp manual, "Output from Processes")
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(add-hook
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'python-shell-first-prompt-hook
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#'org-babel-python--setup-session
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nil 'local)))
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;; Wait until Python initializes
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;; This is more reliable compared to
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;; `org-babel-comint-wait-for-output' as python may emit
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;; multiple prompts during initialization.
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(with-current-buffer py-buffer
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(while (not org-babel-python--initialized)
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(sleep-for 0.010)))
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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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"Initiate Python session named SESSION according to PARAMS.
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If there is not a current inferior-process-buffer matching
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SESSION then create it. If inferior process already
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exists (e.g. if it was manually started with `run-python'), make
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sure it's configured to work with ob-python. If session has
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already been configured as such, do nothing."
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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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(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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RESULT-PARAMS defines the result type."
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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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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_python_format_value(__org_babel_python_final, '%s', %s)"
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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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(org-babel-python-var-to-python result-params)))
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(defun org-babel-python-evaluate
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(session body &optional result-type result-params preamble async graphics-file)
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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 graphics-file)
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(org-babel-python-evaluate-session
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session body result-type result-params graphics-file))
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(org-babel-python-evaluate-external-process
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body result-type result-params preamble graphics-file)))
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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 graphics-file)
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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
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the last statement in BODY, as elisp. If GRAPHICS-FILE is
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non-nil, then save graphical results to that file instead."
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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 nil)
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(concat preamble (and preamble "\n")
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(if graphics-file
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(format org-babel-python--output-graphics-wrapper
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body graphics-file)
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body))))
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(`value (let ((results-file (or graphics-file
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(org-babel-temp-file "python-"))))
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(org-babel-eval (org-babel-python--command nil)
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(concat
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preamble (and preamble "\n")
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(format
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(concat org-babel-python--def-format-value "
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def main():
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%s
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__org_babel_python_format_value(main(), '%s', %s)")
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(org-babel-python--shift-right body)
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(org-babel-process-file-name results-file 'noquote)
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(org-babel-python-var-to-python result-params))))
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(org-babel-eval-read-file results-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 raw))))
|
|
|
|
(defun org-babel-python-send-string (session body)
|
|
"Pass BODY to the Python process in SESSION.
|
|
Return output."
|
|
(with-current-buffer session
|
|
(let* ((string-buffer "")
|
|
(comint-output-filter-functions
|
|
(cons (lambda (text) (setq string-buffer
|
|
(concat string-buffer text)))
|
|
comint-output-filter-functions))
|
|
(body (format "\
|
|
try:
|
|
%s
|
|
except:
|
|
raise
|
|
finally:
|
|
print('%s')"
|
|
(org-babel-python--shift-right body 4)
|
|
org-babel-python-eoe-indicator)))
|
|
(let ((python-shell-buffer-name
|
|
(org-babel-python-without-earmuffs session)))
|
|
(python-shell-send-string body))
|
|
;; same as `python-shell-comint-end-of-output-p' in emacs-25.1+
|
|
(while (not (and (python-shell-comint-end-of-output-p string-buffer)
|
|
(string-match
|
|
org-babel-python-eoe-indicator
|
|
string-buffer)))
|
|
(accept-process-output (get-buffer-process (current-buffer))))
|
|
(org-babel-chomp (substring string-buffer 0 (match-beginning 0))))))
|
|
|
|
(defun org-babel-python-evaluate-session
|
|
(session body &optional result-type result-params graphics-file)
|
|
"Pass BODY to the Python process in SESSION.
|
|
If RESULT-TYPE equals `output' then return standard output as a
|
|
string. If RESULT-TYPE equals `value' then return the value of
|
|
the last statement in BODY, as elisp. If GRAPHICS-FILE is
|
|
non-nil, then save graphical results to that file instead."
|
|
(let* ((tmp-src-file (org-babel-temp-file "python-"))
|
|
(results
|
|
(progn
|
|
(with-temp-file tmp-src-file
|
|
(insert (if (and graphics-file (eq result-type 'output))
|
|
(format org-babel-python--output-graphics-wrapper
|
|
body graphics-file)
|
|
body)))
|
|
(pcase result-type
|
|
(`output
|
|
(let ((body (format "\
|
|
with open('%s') as f:
|
|
exec(compile(f.read(), f.name, 'exec'))"
|
|
(org-babel-process-file-name
|
|
tmp-src-file 'noquote))))
|
|
(org-babel-python-send-string session body)))
|
|
(`value
|
|
(let* ((results-file (or graphics-file
|
|
(org-babel-temp-file "python-")))
|
|
(body (org-babel-python-format-session-value
|
|
tmp-src-file results-file result-params)))
|
|
(org-babel-python-send-string session body)
|
|
(sleep-for 0.010)
|
|
(org-babel-eval-read-file results-file)))))))
|
|
(org-babel-result-cond result-params
|
|
results
|
|
(org-babel-python-table-or-string results))))
|
|
|
|
(defun org-babel-python-read-string (string)
|
|
"Strip \\='s from around Python STRING."
|
|
(if (and (string-prefix-p "'" string)
|
|
(string-suffix-p "'" string))
|
|
(substring string 1 -1)
|
|
string))
|
|
|
|
;; Async session eval
|
|
|
|
(defconst org-babel-python-async-indicator "print ('ob_comint_async_python_%s_%s')")
|
|
|
|
(defun org-babel-python-async-value-callback (params tmp-file)
|
|
(let ((result-params (cdr (assq :result-params params)))
|
|
(results (org-babel-eval-read-file tmp-file)))
|
|
(org-babel-result-cond result-params
|
|
results
|
|
(org-babel-python-table-or-string results))))
|
|
|
|
(defun org-babel-python-async-evaluate-session
|
|
(session body &optional result-type result-params graphics-file)
|
|
"Asynchronously evaluate BODY in SESSION.
|
|
Returns a placeholder string for insertion, to later be replaced
|
|
by `org-babel-comint-async-filter'."
|
|
(org-babel-comint-async-register
|
|
session (current-buffer)
|
|
"ob_comint_async_python_\\(.+\\)_\\(.+\\)"
|
|
'org-babel-chomp 'org-babel-python-async-value-callback)
|
|
(pcase result-type
|
|
(`output
|
|
(let ((uuid (org-id-uuid)))
|
|
(with-temp-buffer
|
|
(insert (format org-babel-python-async-indicator "start" uuid))
|
|
(insert "\n")
|
|
(insert (if graphics-file
|
|
(format org-babel-python--output-graphics-wrapper
|
|
body graphics-file)
|
|
body))
|
|
(insert "\n")
|
|
(insert (format org-babel-python-async-indicator "end" uuid))
|
|
(let ((python-shell-buffer-name
|
|
(org-babel-python-without-earmuffs session)))
|
|
(python-shell-send-buffer)))
|
|
uuid))
|
|
(`value
|
|
(let ((results-file (or graphics-file
|
|
(org-babel-temp-file "python-")))
|
|
(tmp-src-file (org-babel-temp-file "python-")))
|
|
(with-temp-file tmp-src-file (insert body))
|
|
(with-temp-buffer
|
|
(insert (org-babel-python-format-session-value
|
|
tmp-src-file results-file result-params))
|
|
(insert "\n")
|
|
(unless graphics-file
|
|
(insert (format org-babel-python-async-indicator "file" results-file)))
|
|
(let ((python-shell-buffer-name
|
|
(org-babel-python-without-earmuffs session)))
|
|
(python-shell-send-buffer)))
|
|
results-file))))
|
|
|
|
(provide 'ob-python)
|
|
|
|
;;; ob-python.el ends here
|