Initial import; pulled out of scripts/setup.py and put here for public use.

src/questions.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+
+###
+# Copyright (c) 2002, Jeremiah Fincher
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions, and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions, and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   * Neither the name of the author of this software nor the name of
+#     contributors to this software may be used to endorse or promote products
+#     derived from this software without specific prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+###
+
+def expect(prompt, possibilities, recursed=False):
+    if recursed:
+        print 'Sorry, that response was not an option.'
+    if possibilities:
+        prompt = '%s [%s]' % (prompt, '/'.join(possibilities))
+    prompt = prompt.strip() + ' '
+    s = raw_input(prompt)
+    if possibilities:
+        if s in possibilities:
+            return s.strip()
+        else:
+            return expect(prompt, possibilities, recursed=True)
+    else:
+        return s.strip()
+
+def anything(prompt):
+    return expect(prompt, [])
+
+def yn(prompt):
+    return expect(prompt, ['y', 'n'])
+
+def ny(prompt):
+    return expect(prompt, ['n', 'y'])