On Aug 27, 2022, at 7:11 AM, Ihor Radchenko > wrote: --- lisp/ob-python.el | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/lisp/ob-python.el b/lisp/ob-python.el index 932aca08e..2ad907bd8 100644 --- a/lisp/ob-python.el +++ b/lisp/ob-python.el @@ -197,8 +197,7 @@ (defun org-babel-python-initiate-session-by-key (&optional session) (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))) + (run-python cmd))) ((and (eq 'python-mode org-babel-python-mode) (fboundp 'py-shell)) ; python-mode.el (require 'python-mode) @@ -225,8 +224,9 @@ (defun org-babel-python-initiate-session-by-key (&optional 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)))) + (let ((session (org-babel-python-session-buffer + (org-babel-python-initiate-session-by-key session))))) + (org-babel-comint-wait-for-output session))) (defvar org-babel-python-eoe-indicator "org_babel_python_eoe" "A string to indicate that evaluation has completed.") -- 2.35.1 I get the following in the Messages: org-babel-comint-wait-for-output: Buffer python-chain does not exist or has no process Note that python-chain is the name of my session passed to the python blocks as shown in the following line within my org file. #+PROPERTY: header-args:python :session python-chain :exports results :results raw file :file-ext table Thanks, Mark