From b6b9fd9a4e2c6c1f32119531347314c5faae4ced 2017-05-24 21:11:43
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2017-05-24 21:11:43
Subject: [PATCH] Merge pull request #10570 from srinivasreddy/py2_code

Remove python2 code
---

diff --git a/IPython/core/page.py b/IPython/core/page.py
index 4499609..1a966e1 100644
--- a/IPython/core/page.py
+++ b/IPython/core/page.py
@@ -106,18 +106,6 @@ def _detect_screen_size(screen_lines_def):
         # can fail on Linux 2.6, pager_page will catch the TypeError
         raise TypeError('termios error: {0}'.format(err))
 
-    # Curses modifies the stdout buffer size by default, which messes
-    # up Python's normal stdout buffering.  This would manifest itself
-    # to IPython users as delayed printing on stdout after having used
-    # the pager.
-    #
-    # We can prevent this by manually setting the NCURSES_NO_SETBUF
-    # environment variable.  For more details, see:
-    # http://bugs.python.org/issue10144
-    NCURSES_NO_SETBUF = os.environ.get('NCURSES_NO_SETBUF', None)
-    os.environ['NCURSES_NO_SETBUF'] = ''
-
-    # Proceed with curses initialization
     try:
         scr = curses.initscr()
     except AttributeError:
@@ -127,12 +115,6 @@ def _detect_screen_size(screen_lines_def):
     screen_lines_real,screen_cols = scr.getmaxyx()
     curses.endwin()
 
-    # Restore environment
-    if NCURSES_NO_SETBUF is None:
-        del os.environ['NCURSES_NO_SETBUF']
-    else:
-        os.environ['NCURSES_NO_SETBUF'] = NCURSES_NO_SETBUF
-
     # Restore terminal state in case endwin() didn't.
     termios.tcsetattr(sys.stdout,termios.TCSANOW,term_flags)
     # Now we have what we needed: the screen size in rows/columns