> On Jun 9, 2017, at 12:32 PM, STINNER Victor <report@bugs.python.org <mailto:report@bugs.python.org>> wrote:
> 
> 
> STINNER Victor added the comment:
> 
> What is your operating system? How did you install ncurses? What is your ncurses version?
> 
> On Linux, Python is linked dynamically to the system ncurses library. Python is built using system ncurses headers.
> 
> ----------
> 
> _______________________________________
> Python tracker <report@bugs.python.org <mailto:report@bugs.python.org>>
> <http://bugs.python.org/issue30609 <http://bugs.python.org/issue30609>>
> _______________________________________

Host operating system is Windows 10 (updated to 1703)
ncurses and Python 3.6.1 were included in cygwin.

Cygwin log:

2017/03/26 02:34:07 Starting cygwin install, version 2.877
2017/03/26 02:34:07 User has backup/restore rights
2017/03/26 02:34:07 Current Directory: d:\Cygwin64
2017/03/26 02:34:07 Could not open service McShield for query, start and stop. McAfee may not be installed, or we don't have access.
2017/03/26 02:34:17 Ending cygwin install

$ uname -a
CYGWIN_NT-10.0 WIN10PRO64VM 2.8.0(0.309/5/3) 2017-04-01 20:47 x86_64 Cygwin

excerpt from curses.h header file from cygwin’s /user/include/curses.h:

/****************************************************************************
 * Copyright (c) 1998-2016,2017 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com <mailto:zmbenhal@netcom.com>> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com <mailto:esr@snark.thyrsus.com>>                         *
 *     and: Thomas E. Dickey                        1996-on                 *
 ****************************************************************************/

/* $Id: curses.h.in,v 1.248 2017/03/09 09:43:50 tom Exp $ */

#ifndef __NCURSES_H
#define __NCURSES_H

#define CURSES 1
#define CURSES_H 1

/* These are defined only in curses.h, and are used for conditional compiles */
#define NCURSES_VERSION_MAJOR 6
#define NCURSES_VERSION_MINOR 0
#define NCURSES_VERSION_PATCH 20170325

/* This is defined in more than one ncurses header, for identification */
#undef  NCURSES_VERSION
#define NCURSES_VERSION "6.0"

/*
 * Identify the mouse encoding version.
 */
#define NCURSES_MOUSE_VERSION 2

/*
 * Definitions to facilitate DLL's.
 */
#include <ncurses_dll.h>

#if 1
#include <stdint.h>
#endif

/*
 * User-definable tweak to disable the include of <stdbool.h>.
 */
#ifndef NCURSES_ENABLE_STDBOOL_H
#define NCURSES_ENABLE_STDBOOL_H 1
#endif

/*
 * NCURSES_ATTR_T is used to quiet compiler warnings when building ncurses
 * configured using --disable-macros.
 */
#ifndef NCURSES_ATTR_T
#define NCURSES_ATTR_T int
#endif

/*
 * Expands to 'const' if ncurses is configured using --enable-const.  Note that
 * doing so makes it incompatible with other implementations of X/Open Curses.
 */
#undef  NCURSES_CONST
#define NCURSES_CONST /*nothing*/

#undef NCURSES_INLINE
#define NCURSES_INLINE inline

/*
 * The internal type used for color values, and for color-pairs.  The latter
 * allows the curses library to enumerate the combinations of foreground and
 * background colors used by an application, and is normally the product of the
 * total foreground and background colors.
 *
 * X/Open uses "short" for both of these types, ultimately because they are
 * numbers from the SVr4 terminal database, which uses 16-bit signed values.
 */
#undef	NCURSES_COLOR_T
#define	NCURSES_COLOR_T short

#undef	NCURSES_PAIRS_T
#define	NCURSES_PAIRS_T short

/*
 * Definitions used to make WINDOW and similar structs opaque.
 */
#ifndef NCURSES_INTERNALS
#define NCURSES_OPAQUE       1
#define NCURSES_OPAQUE_FORM  0
#define NCURSES_OPAQUE_MENU  0
#define NCURSES_OPAQUE_PANEL 0
#endif

/*
 * Definition used to optionally suppress wattr* macros to help with the
 * transition from ncurses5 to ncurses6 by allowing the header files to
 * be shared across development packages for ncursesw in both ABIs.
 */
#ifndef NCURSES_WATTR_MACROS
#define NCURSES_WATTR_MACROS 1
#endif

/*
 * The reentrant code relies on the opaque setting, but adds features.
 */
#ifndef NCURSES_REENTRANT
#define NCURSES_REENTRANT 1
#endif

/*
 * Control whether bindings for interop support are added.
 */
#undef	NCURSES_INTEROP_FUNCS
#define	NCURSES_INTEROP_FUNCS 0

/*
 * The internal type used for window dimensions.
 */
#undef	NCURSES_SIZE_T
#define	NCURSES_SIZE_T int

/*
 * Control whether tparm() supports varargs or fixed-parameter list.
 */
#undef NCURSES_TPARM_VARARGS
#define NCURSES_TPARM_VARARGS 1

/*
 * Control type used for tparm's arguments.  While X/Open equates long and
 * char* values, this is not always workable for 64-bit platforms.
 */
#undef NCURSES_TPARM_ARG
#define NCURSES_TPARM_ARG long

/*
 * Control whether ncurses uses wcwidth() for checking width of line-drawing
 * characters.
 */
#undef NCURSES_WCWIDTH_GRAPHICS
#define NCURSES_WCWIDTH_GRAPHICS 1

/*
 * NCURSES_CH_T is used in building the library, but not used otherwise in
 * this header file, since that would make the normal/wide-character versions
 * of the header incompatible.
 */
#undef	NCURSES_CH_T
#define NCURSES_CH_T cchar_t

#if 1 && defined(_LP64)
typedef unsigned chtype;
typedef unsigned mmask_t;
#else
typedef unsigned int chtype;
typedef unsigned long mmask_t;
#endif

/*
 * We need FILE, etc.  Include this before checking any feature symbols.
 */
#include <stdio.h>

/*
 * With XPG4, you must define _XOPEN_SOURCE_EXTENDED, it is redundant (or
 * conflicting) when _XOPEN_SOURCE is 500 or greater.  If NCURSES_WIDECHAR is
 * not already defined, e.g., if the platform relies upon nonstandard feature
 * test macros, define it at this point if the standard feature test macros
 * indicate that it should be defined.
 */
#ifndef NCURSES_WIDECHAR
#if defined(_XOPEN_SOURCE_EXTENDED) || (defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE - 0 >= 500))
#define NCURSES_WIDECHAR 1
#else
#define NCURSES_WIDECHAR 0
#endif
#endif /* NCURSES_WIDECHAR */

#include <stdarg.h>	/* we need va_list */
#if NCURSES_WIDECHAR
#include <stddef.h>	/* we want wchar_t */
#endif

/* X/Open and SVr4 specify that curses implements 'bool'.  However, C++ may also
 * implement it.  If so, we must use the C++ compiler's type to avoid conflict
 * with other interfaces.
 *
 * A further complication is that <stdbool.h> may declare 'bool' to be a
 * different type, such as an enum which is not necessarily compatible with
 * C++.  If we have <stdbool.h>, make 'bool' a macro, so users may #undef it.
 * Otherwise, let it remain a typedef to avoid conflicts with other #define's.
 * In either case, make a typedef for NCURSES_BOOL which can be used if needed
 * from either C or C++.
 */

#undef TRUE
#define TRUE    1

NOTE: GitHub repository includes wxPython emulations for Python 2x and for Python 3x.
It has been tested on 32-bit Windows XP, 7, 8 and 10. It has also been tested on various 32-bit
and 64-bit versions of Linux (CentOS, Scientific, Debian, OpenSuSEm and Ubuntu. It has also been
tested on 32-bit and 64-bit Oracle OpenSolaris, OpenIndiana Solaris and TrueOS (PCBSD) Unix.

Feel free to examine the source code and documentation and try it by following the Getting Started
instructions. I’m available to answer any questions or discus my design and implementation rationale.

Richard S. Gordon