def descr_isupper(self, space):
     cased = False
     for uchar in self._value:
         if unicodedb.islower(ord(uchar)) or unicodedb.istitle(ord(uchar)):
             return space.w_False
         if not cased and unicodedb.isupper(ord(uchar)):
             cased = True
     return space.newbool(cased)

def unicode_isupper__Unicode(space, w_unicode):
    cased = False
    for uchar in w_unicode._value:
        if unicodedb.islower(ord(uchar)) or unicodedb.istitle(ord(uchar)):
            return space.w_False
        if not cased and unicodedb.isupper(ord(uchar)):
            cased = True
    return space.newbool(cased)

def unicode_swapcase__Unicode(space, w_self):
    input = w_self._value
    builder = UnicodeBuilder(len(input))
    for i in range(len(input)):
        unichar = ord(input[i])
        if unicodedb.islower(unichar):
            builder.append(unichr(unicodedb.toupper(unichar)))
        elif unicodedb.isupper(unichar):
            builder.append(unichr(unicodedb.tolower(unichar)))
        else:
            builder.append(input[i])
    return W_UnicodeObject(builder.build())

def unicode_swapcase__Unicode(space, w_self):
    input = w_self._value
    result = [u'\0'] * len(input)
    for i in range(len(input)):
        unichar = ord(input[i])
        if unicodedb.islower(unichar):
            result[i] = unichr(unicodedb.toupper(unichar))
        elif unicodedb.isupper(unichar):
            result[i] = unichr(unicodedb.tolower(unichar))
        else:
            result[i] = input[i]
    return W_UnicodeObject(u''.join(result))

def unicode_istitle__Unicode(space, w_unicode):
    cased = False
    previous_is_cased = False
    for uchar in w_unicode._value:
        if unicodedb.isupper(ord(uchar)) or unicodedb.istitle(ord(uchar)):
            if previous_is_cased:
                return space.w_False
            previous_is_cased = cased = True
        elif unicodedb.islower(ord(uchar)):
            if not previous_is_cased:
                return space.w_False
            previous_is_cased = cased = True
        else:
            previous_is_cased = False
    return space.newbool(cased)

 def _islower(self, ch):
     return unicodedb.islower(ord(ch))

def Py_UNICODE_ISLOWER(space, ch):
    """Return 1 or 0 depending on whether ch is a lowercase character."""
    return unicodedb.islower(ord(ch))