[MacPorts] #48911: Output problem with Python 3.5 REPL

[MacPorts]

#48911: Output problem with Python 3.5 REPL
--------------------+--------------------------------
 Reporter:  ronf@…  |      Owner:  macports-tickets@…
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.3.3
 Keywords:          |       Port:  python35
--------------------+--------------------------------
 I installed the Python 3.5 port (@3.5.0) today on my 2011 iMac running
 Yosemite 10.10.5. When I tried to use the interactive read-eval-print
 loop, I saw an immediate problem with the printing of the prompt:

 {{{
 Python 3.5.0 (default, Sep 15 2015, 23:58:24)
 [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.56)] on darwin
 Type "help", "copyright", "credits" or "license" for more information.
 >>> 1+2
 >>> 3
 }}}

 The second ">>>" prompt was printed before the result of the evaluation.
 This same output on Python 3.4 is:

 {{{
 Python 3.4.3 (default, Sep  4 2015, 09:52:14)
 [GCC 4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)] on darwin
 Type "help", "copyright", "credits" or "license" for more information.
 >>> 1+2
 3
 >>>
 }}}

 With 3.5, the prompt is printed too early and the cursor ends up on a
 blank line, but it does properly still accept another expression,
 repeating the problem with the prompt again on that evaluation. Hitting
 Ctrl-D to exit also prints an extra prompt before exiting:

 {{{
 Python 3.5.0 (default, Sep 15 2015, 23:58:24)
 [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.56)] on darwin
 Type "help", "copyright", "credits" or "license" for more information.
 >>> 1+2
 >>> 3
 3+4
 >>> 7
 ^D>>>
 }}}

 After a bit more experimentation, I was able to produce a similar problem
 with the Python 3.4 port, but only when I uninstalled the "py34-readline"
 package. In that case, both Python 3.4 (@3.4.3_5) and Python 3.5 (@3.5.0)
 have this issue. However, with "py34-readline" installed, the problem goes
 away. Unfortunately, there's no "py35-readline" package yet, so I can't
 test that as a possible solution.

-- 
Ticket URL: <https://trac.macports.org/ticket/48911>
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