--- /dev/null
+__doc__ = ur"""
+ >>> s1
+ b'abc\x11'
+ >>> len(s1)
+ 4
+
+ >>> s2
+ b'abc\\x11'
+ >>> len(s2)
+ 7
+
+ >>> s3
+ b'abc\\x11'
+ >>> len(s3)
+ 7
+
+ >>> s4
+ b'abc\x11'
+ >>> len(s4)
+ 4
+
+ >>> s5
+ b'abc\x11'
+ >>> len(s5)
+ 4
+
+ >>> s6
+ b'abc\\x11'
+ >>> len(s6)
+ 7
+
+ >>> s7
+ b'abc\\x11'
+ >>> len(s7)
+ 7
+
+ >>> s8
+ b'abc\\x11'
+ >>> len(s8)
+ 7
+
+ >>> u1
+ u'abc\x11'
+ >>> len(u1)
+ 4
+
+ >>> u2
+ u'abc\x11'
+ >>> len(u2)
+ 4
+
+ >>> u3
+ u'abc\\x11'
+ >>> len(u3)
+ 7
+
+ >>> u4
+ u'abc\\x11'
+ >>> len(u4)
+ 7
+
+ >>> u5
+ u'abc\\x11'
+ >>> len(u5)
+ 7
+"""
+
+import sys
+if sys.version_info[0] >= 3:
+ __doc__ = __doc__.replace(u" u'", u" '")
+else:
+ __doc__ = __doc__.replace(u" b'", u" '")
+
+s1 = "abc\x11"
+s2 = r"abc\x11"
+s3 = R"abc\x11"
+s4 = b"abc\x11"
+s5 = B"abc\x11"
+s6 = br"abc\x11"
+s7 = Br"abc\x11"
+s8 = bR"abc\x11"
+
+u1 = u"abc\x11"
+u2 = U"abc\x11"
+u3 = ur"abc\x11"
+u4 = Ur"abc\x11"
+u5 = uR"abc\x11"