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bug#28580: python.el: native completion setup failed

From: Андрей Парамонов
Subject: bug#28580: python.el: native completion setup failed
Date: Mon, 25 Sep 2017 00:08:50 +0300

2017-09-25 0:00 GMT+03:00 Noam Postavsky <address@hidden>:
Does M-: (python-shell-completion-native-try) RET in the *Python* buffer
return nil?

Yes it does!
Perhaps try putting some `message' calls into
python-shell-completion-native-get-completions? (Using the debugger is a
bit tricky due to the timing of process communication.)  Especially
check the contents of the current inside the `when' block at the end:

              ;; Grab output until our dummy completion used as
              ;; output end marker is found.
              (when (python-shell-accept-process-output
                     process python-shell-completion-native-output-timeout
                (re-search-backward "0__dummy_completion__" nil t)
                   (line-beginning-position) (point-min))
                  "[ \f\t\n\r\v()]+" t)
                 :test #'string=))

Unfortunately my distrib doesn't seem to have the source el-files :-(
Try the recipe in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28051#8
and see if you suffer from that bug.

Hm, the bug and the one mentioned inside describe bad behavior of Python2, but in my case it's the opposite :-/

Best wishes,
Andrey Paramonov

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