bug#38426: 27.0.50; [PATCH] * python.el: new function python-shell-send-statement

[<lin.sun@zoom.us>]

From cbdd2e034fcc438e4c6464f96667a74627d7426b Mon Sep 17 00:00:00 2001
From: "lin.sun" <lin.sun@zoom.us>
Date: Fri, 29 Nov 2019 03:10:12 -0500
Subject: [PATCH] Add new function `python-shell-send-statement' in python.el

* python.el: Add new function `python-shell-send-statement' and bind
to key "C-c C-e" for sending statement under cursor to inferior Python
process.   (Bug#38426)
---
 etc/NEWS                 |  4 ++++
 lisp/progmodes/python.el | 21 +++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/etc/NEWS b/etc/NEWS
index 61d5115..36cf8d2 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1059,6 +1059,10 @@ located and whether GnuPG's option '--homedir' is
used or not.
 It controls the depth of indentation of arguments inside multi-line
 function signatures.
 
+*** The new function 'python-shell-send-region' has been added.
+It send the statement delimited by `python-nav-beginning-of-statement' and
+`python-nav-end-of-statement' to inferior Python process.
+
 ** Tramp
 
 *** The method part of remote file names is mandatory now.
diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 8e7d9f2..f53a92f 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -318,6 +318,7 @@ python-mode-map
     ;; Shell interaction
     (define-key map "\C-c\C-p" 'run-python)
     (define-key map "\C-c\C-s" 'python-shell-send-string)
+    (define-key map "\C-c\C-e" 'python-shell-send-statement)
     (define-key map "\C-c\C-r" 'python-shell-send-region)
     (define-key map "\C-\M-x" 'python-shell-send-defun)
     (define-key map "\C-c\C-c" 'python-shell-send-buffer)
@@ -357,6 +358,8 @@ python-mode-map
          :help "Eval string in inferior Python session"]
         ["Eval buffer" python-shell-send-buffer
          :help "Eval buffer in inferior Python session"]
+        ["Eval statement" python-shell-send-statement
+         :help "Eval statement in inferior Python session"]
         ["Eval region" python-shell-send-region
          :help "Eval region in inferior Python session"]
         ["Eval defun" python-shell-send-defun
@@ -3123,6 +3126,24 @@ python-shell-send-region
     (message "Sent: %s..." (match-string 1 original-string))
     (python-shell-send-string string process)))
 
+(defun python-shell-send-statement (&optional send-main msg)
+  "Send the statement at point to inferior Python process.
+The statement is delimited by `python-nav-beginning-of-statement' and
+`python-nav-end-of-statement'. When optional argument SEND-MAIN is non-nil,
+allow execution of code inside inside blocks delimited by \"if __name__==
+\\='__main__\\=':\". When called interactively SEND-MAIN defaults to nil,
+unless it's called with prefix argument. When optional argument MSG is
+non-nil, forces display of a user-friendly message if there's no process
+running; default to t when called interactively. If there is region be
+activated, it present as `python-shell-send-region'."
+  (interactive (list current-prefix-arg t))
+  (if (region-active-p)
+      (python-shell-send-region (region-beginning) (region-end) send-main
msg)
+    (python-shell-send-region
+     (save-excursion (python-nav-beginning-of-statement))
+     (save-excursion (python-nav-end-of-statement))
+     send-main msg)))
+
 (defun python-shell-send-buffer (&optional send-main msg)
   "Send the entire buffer to inferior Python process.
 When optional argument SEND-MAIN is non-nil, allow execution of
-- 
2.2.0