Hi!

The following src block prints correctly if run in non-session mode, it
does not print at all if the :session keyword is set.

#+BEGIN_SRC python :results output org
a, b = 0, 1

while b < 1000:
    a, b = b, a + b
    print(a, end=" ")
#+END_SRC

#+RESULTS:
#+BEGIN_SRC org
1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987
#+END_SRC

Is this expected behavior?

Kind regards,
Tarjei Bærland

------------------------------------------------------------------------



Emacs  : GNU Emacs 25.0.50.1 (x86_64-w64-mingw32)
 of 2015-07-25 on KAEL
Package: Org mode version 9.1.1 (9.1.1-6-gd40deb-elpa @
c:/Users/tabaa004/Dropbox/home/.emacs.d/elpa/org-20170925/)

current state:
==============
(setq
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe
                      org-babel-header-arg-expand)
 org-footnote-section "nil"
 org-speed-command-hook '(org-speed-command-activate
                          org-babel-speed-command-activate)
 org-agenda-skip-timestamp-if-done t
 org-occur-hook '(org-first-headline-recenter)
 org-src-tab-acts-natively t
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-src-window-setup '(current-window)
 org-latex-format-inlinetask-function
'org-latex-format-inlinetask-default-function
 org-confirm-shell-link-function 'yes-or-no-p
 org-image-actual-width nil
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-export-with-section-numbers nil
 org-export-with-toc nil
 org-list-allow-alphabetical t
 org-agenda-skip-scheduled-if-done t
 org-agenda-custom-commands '(("h" "Agenda og hjemme"
                               ((agenda ""
                                 ((org-agenda-span 14)
                                  (org-deadline-warning-days 14)
                                  (org-agenda-prefix-format "")
                                  (org-agenda-filter-preset (quote
("-jobb"))))
                                 )
                                )
                               )
                              ("j" "Jobb i dag og i morra"
                               ((agenda ""
                                 ((org-agenda-span 2)
                                  (org-agenda-filter-preset (quote
("+jobb")))
                                  (org-agenda-prefix-format "%t "))
                                 )
                                (todo "TODO"
                                 ((org-agenda-filter-preset (quote
("+jobb")))
                                  (org-agenda-max-entries 0))
                                 )
                                )
                               )
                              )
 org-latex-format-headline-function
'org-latex-format-headline-default-function
 org-agenda-include-diary t
 org-startup-indented t
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"]
 org-odt-format-headline-function 'org-odt-format-headline-default-function
 org-capture-mode-hook '(delete-other-windows)
 org-from-is-user-regexp nil
 org-html-postamble nil
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
                     org-src-mode-configure-edit-buffer)
 org-tags-column -94
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-html-footnotes-section "<div id=\"footnotes\">\n<h2
class=\"footnotes\" hidden>%s</h2>\n<hr>\n<div
id=\"text-footnotes\">\n%s\n</div>\n</div>"
 org-trigger-hook '(taba-write-journal-on-todo)
 org-mode-hook '(visual-fill-column-mode visual-line-mode
                 #[0 "\300\301\302\303\304$\207"
                   [add-hook change-major-mode-hook org-show-block-all
append
                    local]
                   5]
                 #[0 "\300\301\302\303\304$\207"
                   [add-hook change-major-mode-hook
org-babel-show-result-all
                    append local]
                   5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-refile-targets '((nil :maxlevel . 2) (org-agenda-files :maxlevel . 2))
 org-export-coding-system 'utf-8
 org-bibtex-headline-format-function #[257 "\300 \236A\207" [:title] 3
"\n\n(fn ENTRY)"]
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-ascii-format-drawer-function #[771 " \207" [] 4 "\n\n(fn NAME CONTENTS
WIDTH)"]
 org-odt-format-inlinetask-function
'org-odt-format-inlinetask-default-function
 org-refile-use-outline-path 'file
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
                  org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-todo-keywords '((sequence "TODO" "|" "DONE")
                     (sequence "." "PLANLAGT" "|" "AVHOLDT")
                     (sequence "|" "CANCELED"))
 org-modules '(org-habit org-w3m org-bbdb org-bibtex org-docview org-gnus
               org-info org-irc org-mhe org-rmail)
 org-agenda-window-setup '(current-window)
 org-babel-tangle-lang-exts '(("latex" . "tex") ("D" . "d") ("C++" . "cpp")
                              ("python" . "py") ("emacs-lisp" . "el")
                              ("elisp" . "el"))
 org-confirm-elisp-link-function 'yes-or-no-p
 org-edit-src-content-indentation 0
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-agenda-skip-deadline-if-done t
 org-html-format-headline-function
'org-html-format-headline-default-function
 org-link-parameters '(("id" :follow org-id-open)
                       ("rmail" :follow org-rmail-open :store
                        org-rmail-store-link)
                       ("mhe" :follow org-mhe-open :store
org-mhe-store-link)
                       ("irc" :follow org-irc-visit :store
org-irc-store-link)
                       ("info" :follow org-info-open :export org-info-export
                        :store org-info-store-link)
                       ("gnus" :follow org-gnus-open :store
org-gnus-store-link)
                       ("docview" :follow org-docview-open :export
                        org-docview-export :store org-docview-store-link)
                       ("bibtex" :follow org-bibtex-open :store
                        org-bibtex-store-link)
                       ("bbdb" :follow org-bbdb-open :export org-bbdb-export
                        :complete org-bbdb-complete-link :store
                        org-bbdb-store-link)
                       ("w3m" :store org-w3m-store-link) ("file+sys")
                       ("file+emacs") ("doi" :follow org--open-doi-link)
                       ("elisp" :follow org--open-elisp-link)
                       ("file" :complete org-file-complete-link)
                       ("ftp" :follow
                        (lambda (path) (browse-url (concat "ftp:" path))))
                       ("help" :follow org--open-help-link)
                       ("http" :follow
                        (lambda (path) (browse-url (concat "http:" path))))
                       ("https" :follow
                        (lambda (path) (browse-url (concat "https:" path))))
                       ("mailto" :follow
                        (lambda (path) (browse-url (concat "mailto:"
path))))
                       ("news" :follow
                        (lambda (path) (browse-url (concat "news:" path))))
                       ("shell" :follow org--open-shell-link))
 org-structure-template-alist '(("t" "#+BEGIN_TASK\n?\n#+END_TASK")
                                ("ll"
                                 "#+html: <input type=\"button\"
onclick=\"return toggleMe('special1')\"
value=\"løsning\"><br><br>\n#+attr_html: :id special1 :style
display:none;border:1px solid black\n#+begin_div\n?\n#+end_div")
                                ("ii"
                                 "#+ATTR_HTML: :width 100% :heigh
100%\n[[./figurer/?]]")
                                ("rs" "#+REVEAL: split")
                                ("rfA" "#+ATTR_REVEAL: :frag (appear)")
                                ("rfa" "#+ATTR_REVEAL: :frag appear")
                                ("n" "#+BEGIN_NOTES\n?\n#+END_NOTES")
                                ("s" "#+BEGIN_SRC ?\n\n#+END_SRC")
                                ("e" "#+BEGIN_EXAMPLE\n?\n#+END_EXAMPLE")
                                ("q" "#+BEGIN_QUOTE\n?\n#+END_QUOTE")
                                ("v" "#+BEGIN_VERSE\n?\n#+END_VERSE")
                                ("V" "#+BEGIN_VERBATIM\n?\n#+END_VERBATIM")
                                ("c" "#+BEGIN_CENTER\n?\n#+END_CENTER")
                                ("C" "#+BEGIN_COMMENT\n?\n#+END_COMMENT")
                                ("l" "#+BEGIN_EXPORT
latex\n?\n#+END_EXPORT")
                                ("L" "#+LaTeX: ")
                                ("h" "#+BEGIN_EXPORT html\n?\n#+END_EXPORT")
                                ("H" "#+HTML: ")
                                ("a" "#+BEGIN_EXPORT
ascii\n?\n#+END_EXPORT")
                                ("A" "#+ASCII: ") ("i" "#+INDEX: ?")
                                ("I" "#+INCLUDE: %file ?"))
 org-reveal-title-slide "<h1>%t</h1>"
 org-babel-load-languages '((sh . t) (emacs-lisp . t) (python . t) (org . t)
                            (C . t) (dot . t) (latex . t))
 org-html-format-inlinetask-function
'org-html-format-inlinetask-default-function
 org-agenda-files '("~/jobb/fagmateriell/org/promo/variabler-datatyper.org"
                    "~/jobb/fagmateriell/org/promo/abstraksjon.org"
                    "~/jobb/fagmateriell/org/statistikk-oppgave/todo.org"
                    "~/jobb/timer/2MAP-2PB1.org"
"~/jobb/timer/1NAT5-3DHA.org"
                    "~/jobb/timer/2TF1-2TF3.org"
"~/jobb/timer/2FYSA-2FYSA.org"
                    "~/journal/journal.org" "~/journal/gjøremål.org
<http://xn--gjreml-mua2m.org>"
                    "~/journal/møter.org <http://xn--mter-gra.org>")
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-publish-project-alist '(("konturer-notes" :base-directory
                              "~/jobb/fagmateriell/org" :base-extension
"org"
                              :publishing-directory
"~/jobb/fagmateriell/html"
                              :publishing-function org-html-publish-to-html
                              :recursive t :headline-levels 4 :html-preamble
                              konturer-preamble :exclude "*/todo.org")
                             ("konturer-static" :base-directory
                              "~/jobb/fagmateriell/org" :base-extension

"css\\|js\\|png\\|jpg\\|gif\\|pdf\\|mp3\\|ogg\\|sww\\|gmbl\\|ggb\\|svg"
:publishing-directory "~/jobb/fagmateriell/html" :recursive t
:publishing-function org-publish-attachment)
                             ("konturer-pres" :base-directory
                              "~/jobb/fagmateriell/org" :base-extension
"orgpres"
                              :publishing-directory
"~/jobb/fagmateriell/html"
                              :recursive t :publishing-function
                              taba-org-reveal-publish-to-html)
                             ("konturer" :components "konturer-notes"
                              "konturer-static" "konturer-pres")
                             ("promo-notes" :base-directory
                              "~/jobb/fagmateriell/org/promo"
:base-extension
                              "org" :publishing-directory
                              "~/jobb/fagmateriell/html/promo"
                              :publishing-function org-html-publish-to-html
                              :recursive t :headline-levels 4 :html-preamble
                              konturer-preamble :exclude "*/todo.org")
                             ("promo-static" :base-directory
                              "~/jobb/fagmateriell/org/promo"
:base-extension

"css\\|js\\|png\\|jpg\\|gif\\|pdf\\|mp3\\|ogg\\|sww\\|gmbl\\|ggb\\|svg"
:publishing-directory "~/jobb/fagmateriell/html/promo" :recursive t
:publishing-function org-publish-attachment)
                             )
 )