summaryrefslogtreecommitdiff
path: root/elpa/org-9.5.2/ob-python.el
blob: 3c095ad463f4eb99cf8f48ee014b50ac51271b2a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
;;; ob-python.el --- Babel Functions for Python      -*- lexical-binding: t; -*-

;; Copyright (C) 2009-2021 Free Software Foundation, Inc.

;; Authors: Eric Schulte
;;	 Dan Davison
;; Maintainer: Jack Kamm <jackkamm@gmail.com>
;; Keywords: literate programming, reproducible research
;; Homepage: https://orgmode.org

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Org-Babel support for evaluating python source code.

;;; Code:
(require 'ob)
(require 'org-macs)
(require 'python)

(declare-function py-shell "ext:python-mode" (&rest args))
(declare-function py-toggle-shells "ext:python-mode" (arg))
(declare-function py-shell-send-string "ext:python-mode" (strg &optional process))

(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("python" . "py"))

(defvar org-babel-default-header-args:python '())

(defcustom org-babel-python-command "python"
  "Name of the command for executing Python code."
  :version "24.4"
  :package-version '(Org . "8.0")
  :group 'org-babel
  :type 'string)

(defcustom org-babel-python-mode
  (if (featurep 'python-mode) 'python-mode 'python)
  "Preferred python mode for use in running python interactively.
This will typically be either `python' or `python-mode'."
  :group 'org-babel
  :version "24.4"
  :package-version '(Org . "8.0")
  :type 'symbol)

(defcustom org-babel-python-hline-to "None"
  "Replace hlines in incoming tables with this when translating to python."
  :group 'org-babel
  :version "24.4"
  :package-version '(Org . "8.0")
  :type 'string)

(defcustom org-babel-python-None-to 'hline
  "Replace `None' in python tables with this before returning."
  :group 'org-babel
  :version "24.4"
  :package-version '(Org . "8.0")
  :type 'symbol)

(defun org-babel-execute:python (body params)
  "Execute a block of Python code with Babel.
This function is called by `org-babel-execute-src-block'."
  (let* ((org-babel-python-command
	  (or (cdr (assq :python params))
	      org-babel-python-command))
	 (session (org-babel-python-initiate-session
		   (cdr (assq :session params))))
         (result-params (cdr (assq :result-params params)))
         (result-type (cdr (assq :result-type params)))
	 (return-val (when (eq result-type 'value)
		       (cdr (assq :return params))))
	 (preamble (cdr (assq :preamble params)))
	 (async (org-babel-comint-use-async params))
         (full-body
	  (concat
	   (org-babel-expand-body:generic
	    body params
	    (org-babel-variable-assignments:python params))
	   (when return-val
	     (format (if session "\n%s" "\nreturn %s") return-val))))
         (result (org-babel-python-evaluate
		  session full-body result-type
		  result-params preamble async)))
    (org-babel-reassemble-table
     result
     (org-babel-pick-name (cdr (assq :colname-names params))
			  (cdr (assq :colnames params)))
     (org-babel-pick-name (cdr (assq :rowname-names params))
			  (cdr (assq :rownames params))))))

(defun org-babel-prep-session:python (session params)
  "Prepare SESSION according to the header arguments in PARAMS.
VARS contains resolved variable references."
  (let* ((session (org-babel-python-initiate-session session))
	 (var-lines
	  (org-babel-variable-assignments:python params)))
    (org-babel-comint-in-buffer session
      (mapc (lambda (var)
              (end-of-line 1) (insert var) (comint-send-input)
              (org-babel-comint-wait-for-output session))
	    var-lines))
    session))

(defun org-babel-load-session:python (session body params)
  "Load BODY into SESSION."
  (save-window-excursion
    (let ((buffer (org-babel-prep-session:python session params)))
      (with-current-buffer buffer
        (goto-char (process-mark (get-buffer-process (current-buffer))))
        (insert (org-babel-chomp body)))
      buffer)))

;; helper functions

(defun org-babel-variable-assignments:python (params)
  "Return a list of Python statements assigning the block's variables."
  (mapcar
   (lambda (pair)
     (format "%s=%s"
	     (car pair)
	     (org-babel-python-var-to-python (cdr pair))))
   (org-babel--get-vars params)))

(defun org-babel-python-var-to-python (var)
  "Convert an elisp value to a python variable.
Convert an elisp value, VAR, into a string of python source code
specifying a variable of the same value."
  (if (listp var)
      (concat "[" (mapconcat #'org-babel-python-var-to-python var ", ") "]")
    (if (eq var 'hline)
	org-babel-python-hline-to
      (format
       (if (and (stringp var) (string-match "[\n\r]" var)) "\"\"%S\"\"" "%S")
       (if (stringp var) (substring-no-properties var) var)))))

(defun org-babel-python-table-or-string (results)
  "Convert RESULTS into an appropriate elisp value.
If the results look like a list or tuple, then convert them into an
Emacs-lisp table, otherwise return the results as a string."
  (let ((res (org-babel-script-escape results)))
    (if (listp res)
        (mapcar (lambda (el) (if (eq el 'None)
                                 org-babel-python-None-to el))
                res)
      res)))

(defvar org-babel-python-buffers '((:default . "*Python*")))

(defun org-babel-python-session-buffer (session)
  "Return the buffer associated with SESSION."
  (cdr (assoc session org-babel-python-buffers)))

(defun org-babel-python-with-earmuffs (session)
  (let ((name (if (stringp session) session (format "%s" session))))
    (if (and (string= "*" (substring name 0 1))
	     (string= "*" (substring name (- (length name) 1))))
	name
      (format "*%s*" name))))

(defun org-babel-python-without-earmuffs (session)
  (let ((name (if (stringp session) session (format "%s" session))))
    (if (and (string= "*" (substring name 0 1))
	     (string= "*" (substring name (- (length name) 1))))
	(substring name 1 (- (length name) 1))
      name)))

(defvar py-default-interpreter)
(defvar py-which-bufname)
(defvar python-shell-buffer-name)
(defun org-babel-python-initiate-session-by-key (&optional session)
  "Initiate a python session.
If there is not a current inferior-process-buffer in SESSION
then create.  Return the initialized session."
  (save-window-excursion
    (let* ((session (if session (intern session) :default))
           (py-buffer (org-babel-python-session-buffer session))
	   (cmd (if (member system-type '(cygwin windows-nt ms-dos))
		    (concat org-babel-python-command " -i")
		  org-babel-python-command)))
      (cond
       ((eq 'python org-babel-python-mode) ; python.el
	(unless py-buffer
	  (setq py-buffer (org-babel-python-with-earmuffs session)))
	(let ((python-shell-buffer-name
	       (org-babel-python-without-earmuffs py-buffer)))
	  (run-python cmd)
	  (sleep-for 0 10)))
       ((and (eq 'python-mode org-babel-python-mode)
	     (fboundp 'py-shell)) ; python-mode.el
	(require 'python-mode)
	;; Make sure that py-which-bufname is initialized, as otherwise
	;; it will be overwritten the first time a Python buffer is
	;; created.
	(py-toggle-shells py-default-interpreter)
	;; `py-shell' creates a buffer whose name is the value of
	;; `py-which-bufname' with '*'s at the beginning and end
	(let* ((bufname (if (and py-buffer (buffer-live-p py-buffer))
			    (replace-regexp-in-string ;; zap surrounding *
			     "^\\*\\([^*]+\\)\\*$" "\\1" py-buffer)
			  (concat "Python-" (symbol-name session))))
	       (py-which-bufname bufname))
	  (setq py-buffer (org-babel-python-with-earmuffs bufname))
	  (py-shell nil nil t org-babel-python-command py-buffer nil nil t nil)))
       (t
	(error "No function available for running an inferior Python")))
      (setq org-babel-python-buffers
	    (cons (cons session py-buffer)
		  (assq-delete-all session org-babel-python-buffers)))
      session)))

(defun org-babel-python-initiate-session (&optional session _params)
  "Create a session named SESSION according to PARAMS."
  (unless (string= session "none")
    (org-babel-python-session-buffer
     (org-babel-python-initiate-session-by-key session))))

(defvar org-babel-python-eoe-indicator "org_babel_python_eoe"
  "A string to indicate that evaluation has completed.")

(defconst org-babel-python-wrapper-method
  "
def main():
%s

open('%s', 'w').write( str(main()) )")
(defconst org-babel-python-pp-wrapper-method
  "
import pprint
def main():
%s

open('%s', 'w').write( pprint.pformat(main()) )")

(defconst org-babel-python--exec-tmpfile "\
with open('%s') as __org_babel_python_tmpfile:
    exec(compile(__org_babel_python_tmpfile.read(), __org_babel_python_tmpfile.name, 'exec'))"
  "Template for Python session command with output results.

Has a single %s escape, the tempfile containing the source code
to evaluate.")

(defun org-babel-python-format-session-value
    (src-file result-file result-params)
  "Return Python code to evaluate SRC-FILE and write result to RESULT-FILE."
  (format "\
import ast
with open('%s') as __org_babel_python_tmpfile:
    __org_babel_python_ast = ast.parse(__org_babel_python_tmpfile.read())
__org_babel_python_final = __org_babel_python_ast.body[-1]
if isinstance(__org_babel_python_final, ast.Expr):
    __org_babel_python_ast.body = __org_babel_python_ast.body[:-1]
    exec(compile(__org_babel_python_ast, '<string>', 'exec'))
    __org_babel_python_final = eval(compile(ast.Expression(
        __org_babel_python_final.value), '<string>', 'eval'))
    with open('%s', 'w') as __org_babel_python_tmpfile:
        if %s:
            import pprint
            __org_babel_python_tmpfile.write(pprint.pformat(__org_babel_python_final))
        else:
            __org_babel_python_tmpfile.write(str(__org_babel_python_final))
else:
    exec(compile(__org_babel_python_ast, '<string>', 'exec'))
    __org_babel_python_final = None"
	  (org-babel-process-file-name src-file 'noquote)
	  (org-babel-process-file-name result-file 'noquote)
	  (if (member "pp" result-params) "True" "False")))

(defun org-babel-python-evaluate
    (session body &optional result-type result-params preamble async)
  "Evaluate BODY as Python code."
  (if session
      (if async
	  (org-babel-python-async-evaluate-session
	   session body result-type result-params)
	(org-babel-python-evaluate-session
	 session body result-type result-params))
    (org-babel-python-evaluate-external-process
     body result-type result-params preamble)))

(defun org-babel-python--shift-right (body &optional count)
  (with-temp-buffer
    (python-mode)
    (insert body)
    (goto-char (point-min))
    (while (not (eobp))
      (unless (python-syntax-context 'string)
	(python-indent-shift-right (line-beginning-position)
				   (line-end-position)
				   count))
      (forward-line 1))
    (buffer-string)))

(defun org-babel-python-evaluate-external-process
    (body &optional result-type result-params preamble)
  "Evaluate BODY in external python process.
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."
  (let ((raw
         (pcase result-type
           (`output (org-babel-eval org-babel-python-command
				    (concat preamble (and preamble "\n")
					    body)))
           (`value (let ((tmp-file (org-babel-temp-file "python-")))
		     (org-babel-eval
		      org-babel-python-command
		      (concat
		       preamble (and preamble "\n")
		       (format
			(if (member "pp" result-params)
			    org-babel-python-pp-wrapper-method
			  org-babel-python-wrapper-method)
			(org-babel-python--shift-right body)
			(org-babel-process-file-name tmp-file 'noquote))))
		     (org-babel-eval-read-file tmp-file))))))
    (org-babel-result-cond result-params
      raw
      (org-babel-python-table-or-string (org-trim 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)))
      (if (not (eq 'python-mode org-babel-python-mode))
	  (let ((python-shell-buffer-name
		 (org-babel-python-without-earmuffs session)))
	    (python-shell-send-string body))
	(require 'python-mode)
	(py-shell-send-string body (get-buffer-process session)))
      ;; same as `python-shell-comint-end-of-output-p' in emacs-25.1+
      (while (not (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)
  "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."
  (let* ((tmp-src-file (org-babel-temp-file "python-"))
         (results
	  (progn
	    (with-temp-file tmp-src-file (insert body))
            (pcase result-type
	      (`output
	       (let ((body (format org-babel-python--exec-tmpfile
				   (org-babel-process-file-name
				    tmp-src-file 'noquote))))
		 (org-babel-python--send-string session body)))
              (`value
               (let* ((tmp-results-file (org-babel-temp-file "python-"))
		      (body (org-babel-python-format-session-value
			     tmp-src-file tmp-results-file result-params)))
		 (org-babel-python--send-string session body)
		 (sleep-for 0 10)
		 (org-babel-eval-read-file tmp-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)
  "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)
  (let ((python-shell-buffer-name (org-babel-python-without-earmuffs session)))
    (pcase result-type
      (`output
       (let ((uuid (md5 (number-to-string (random 100000000)))))
         (with-temp-buffer
           (insert (format org-babel-python-async-indicator "start" uuid))
           (insert "\n")
           (insert body)
           (insert "\n")
           (insert (format org-babel-python-async-indicator "end" uuid))
           (python-shell-send-buffer))
         uuid))
      (`value
       (let ((tmp-results-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 tmp-results-file result-params))
           (insert "\n")
           (insert (format org-babel-python-async-indicator "file" tmp-results-file))
           (python-shell-send-buffer))
         tmp-results-file)))))

(provide 'ob-python)

;;; ob-python.el ends here