Python sys.maxunicode() Examples

def _pep425_get_abi():
    """
    :return:
        A unicode string of the system abi. Will be something like: "cp27m",
        "cp33m", etc.
    """

    try:
        soabi = sysconfig.get_config_var('SOABI')
        if soabi:
            if soabi.startswith('cpython-'):
                return 'cp%s' % soabi.split('-')[1]
            return soabi.replace('.', '_').replace('-', '_')
    except (IOError, NameError):
        pass

    impl = _pep425_implementation()
    suffix = ''
    if impl == 'cp':
        suffix += 'm'
    if sys.maxunicode == 0x10ffff and sys.version_info < (3, 3):
        suffix += 'u'
    return '%s%s%s' % (impl, ''.join(map(str_cls, _pep425_version())), suffix) 

def test_invalid_escape_sequences(self):
        # incomplete escape sequence
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\u')
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\u1')
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\u12')
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\u123')
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\u1234')
        # invalid escape sequence
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\u123x"')
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\u12x4"')
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\u1x34"')
        self.assertRaises(json.JSONDecodeError, json.loads, '"\\ux234"')
        if sys.maxunicode > 65535:
            # invalid escape sequence for low surrogate
            self.assertRaises(json.JSONDecodeError, json.loads, '"\\ud800\\u"')
            self.assertRaises(json.JSONDecodeError, json.loads, '"\\ud800\\u0"')
            self.assertRaises(json.JSONDecodeError, json.loads, '"\\ud800\\u00"')
            self.assertRaises(json.JSONDecodeError, json.loads, '"\\ud800\\u000"')
            self.assertRaises(json.JSONDecodeError, json.loads, '"\\ud800\\u000x"')
            self.assertRaises(json.JSONDecodeError, json.loads, '"\\ud800\\u00x0"')
            self.assertRaises(json.JSONDecodeError, json.loads, '"\\ud800\\u0x00"')
            self.assertRaises(json.JSONDecodeError, json.loads, '"\\ud800\\ux000"') 

def test_hasattr(self):
        import sys
        self.assertTrue(hasattr(sys, 'stdout'))
        self.assertRaises(TypeError, hasattr, sys, 1)
        self.assertRaises(TypeError, hasattr)
        if have_unicode:
            self.assertRaises(UnicodeError, hasattr, sys, unichr(sys.maxunicode))

        # Check that hasattr allows SystemExit and KeyboardInterrupts by
        class A:
            def __getattr__(self, what):
                raise KeyboardInterrupt
        self.assertRaises(KeyboardInterrupt, hasattr, A(), "b")
        class B:
            def __getattr__(self, what):
                raise SystemExit
        self.assertRaises(SystemExit, hasattr, B(), "b") 

def test_backslashescape(self):
        # Does the same as the "unicode-escape" encoding, but with different
        # base encodings.
        sin = u"a\xac\u1234\u20ac\u8000"
        if sys.maxunicode > 0xffff:
            sin += unichr(sys.maxunicode)
        sout = "a\\xac\\u1234\\u20ac\\u8000"
        if sys.maxunicode > 0xffff:
            sout += "\\U%08x" % sys.maxunicode
        self.assertEqual(sin.encode("ascii", "backslashreplace"), sout)

        sout = "a\xac\\u1234\\u20ac\\u8000"
        if sys.maxunicode > 0xffff:
            sout += "\\U%08x" % sys.maxunicode
        self.assertEqual(sin.encode("latin-1", "backslashreplace"), sout)

        sout = "a\xac\\u1234\xa4\\u8000"
        if sys.maxunicode > 0xffff:
            sout += "\\U%08x" % sys.maxunicode
        self.assertEqual(sin.encode("iso-8859-15", "backslashreplace"), sout) 

def test_bug1251300(self):
        # Decoding with unicode_internal used to not correctly handle "code
        # points" above 0x10ffff on UCS-4 builds.
        if sys.maxunicode > 0xffff:
            ok = [
                ("\x00\x10\xff\xff", u"\U0010ffff"),
                ("\x00\x00\x01\x01", u"\U00000101"),
                ("", u""),
            ]
            not_ok = [
                "\x7f\xff\xff\xff",
                "\x80\x00\x00\x00",
                "\x81\x00\x00\x00",
                "\x00",
                "\x00\x00\x00\x00\x00",
            ]
            for internal, uni in ok:
                if sys.byteorder == "little":
                    internal = "".join(reversed(internal))
                self.assertEqual(uni, internal.decode("unicode_internal"))
            for internal in not_ok:
                if sys.byteorder == "little":
                    internal = "".join(reversed(internal))
                self.assertRaises(UnicodeDecodeError, internal.decode,
                    "unicode_internal") 

def test_unichr(self):

        #Added the following to resolve Codeplex WorkItem #3220.
        max_uni = sys.maxunicode
        self.assertTrue(max_uni==0xFFFF or max_uni==0x10FFFF)
        max_uni_plus_one = max_uni + 1

        huger_than_max = 100000
        max_ok_value = u'\uffff'

        #special case for WorkItem #3220
        if max_uni==0x10FFFF:
            huger_than_max = 10000000
            max_ok_value = u'\U0010FFFF'

        self.assertRaises(ValueError, unichr, -1) # arg must be in the range [0...65535] or [0...1114111] inclusive
        self.assertRaises(ValueError, unichr, max_uni_plus_one)
        self.assertRaises(ValueError, unichr, huger_than_max)
        self.assertTrue(unichr(0) == '\x00')
        self.assertTrue(unichr(max_uni) == max_ok_value) 

def test_hasattr(self):
        import sys
        self.assertTrue(hasattr(sys, 'stdout'))
        self.assertRaises(TypeError, hasattr, sys, 1)
        self.assertRaises(TypeError, hasattr)
        if have_unicode:
            self.assertRaises(UnicodeError, hasattr, sys, unichr(sys.maxunicode))

        # Check that hasattr allows SystemExit and KeyboardInterrupts by
        class A:
            def __getattr__(self, what):
                raise KeyboardInterrupt
        self.assertRaises(KeyboardInterrupt, hasattr, A(), "b")
        class B:
            def __getattr__(self, what):
                raise SystemExit
        self.assertRaises(SystemExit, hasattr, B(), "b") 

def test_utf8_decode_valid_sequences(self):
        sequences = [
            # single byte
            ('\x00', u'\x00'), ('a', u'a'), ('\x7f', u'\x7f'),
            # 2 bytes
            ('\xc2\x80', u'\x80'), ('\xdf\xbf', u'\u07ff'),
            # 3 bytes
            ('\xe0\xa0\x80', u'\u0800'), ('\xed\x9f\xbf', u'\ud7ff'),
            ('\xee\x80\x80', u'\uE000'), ('\xef\xbf\xbf', u'\uffff'),
            # 4 bytes
            ('\xF0\x90\x80\x80', u'\U00010000'),
            ('\xf4\x8f\xbf\xbf', u'\U0010FFFF')
        ]
        for seq, res in sequences:
            self.assertEqual(seq.decode('utf-8'), res)

        for ch in map(unichr, range(0, sys.maxunicode)):
            self.assertEqual(ch, ch.encode('utf-8').decode('utf-8')) 

def test_backslashescape(self):
        # Does the same as the "unicode-escape" encoding, but with different
        # base encodings.
        sin = u"a\xac\u1234\u20ac\u8000"
        if sys.maxunicode > 0xffff:
            sin += unichr(sys.maxunicode)
        sout = "a\\xac\\u1234\\u20ac\\u8000"
        if sys.maxunicode > 0xffff:
            sout += "\\U%08x" % sys.maxunicode
        self.assertEqual(sin.encode("ascii", "backslashreplace"), sout)

        sout = "a\xac\\u1234\\u20ac\\u8000"
        if sys.maxunicode > 0xffff:
            sout += "\\U%08x" % sys.maxunicode
        self.assertEqual(sin.encode("latin-1", "backslashreplace"), sout)

        sout = "a\xac\\u1234\xa4\\u8000"
        if sys.maxunicode > 0xffff:
            sout += "\\U%08x" % sys.maxunicode
        self.assertEqual(sin.encode("iso-8859-15", "backslashreplace"), sout) 

def test_bug1251300(self):
        # Decoding with unicode_internal used to not correctly handle "code
        # points" above 0x10ffff on UCS-4 builds.
        if sys.maxunicode > 0xffff:
            ok = [
                ("\x00\x10\xff\xff", u"\U0010ffff"),
                ("\x00\x00\x01\x01", u"\U00000101"),
                ("", u""),
            ]
            not_ok = [
                "\x7f\xff\xff\xff",
                "\x80\x00\x00\x00",
                "\x81\x00\x00\x00",
                "\x00",
                "\x00\x00\x00\x00\x00",
            ]
            for internal, uni in ok:
                if sys.byteorder == "little":
                    internal = "".join(reversed(internal))
                self.assertEqual(uni, internal.decode("unicode_internal"))
            for internal in not_ok:
                if sys.byteorder == "little":
                    internal = "".join(reversed(internal))
                self.assertRaises(UnicodeDecodeError, internal.decode,
                    "unicode_internal") 

def test_hasattr(self):
        import sys
        self.assertTrue(hasattr(sys, 'stdout'))
        self.assertRaises(TypeError, hasattr, sys, 1)
        self.assertRaises(TypeError, hasattr)
        if have_unicode:
            self.assertRaises(UnicodeError, hasattr, sys, unichr(sys.maxunicode))

        # Check that hasattr allows SystemExit and KeyboardInterrupts by
        class A:
            def __getattr__(self, what):
                raise KeyboardInterrupt
        self.assertRaises(KeyboardInterrupt, hasattr, A(), "b")
        class B:
            def __getattr__(self, what):
                raise SystemExit
        self.assertRaises(SystemExit, hasattr, B(), "b") 

def property_chars(self, prefix):
    return "".join(six.unichr(x) for x in range(sys.maxunicode)
                   if unicodedata.category(six.unichr(x)).startswith(prefix)) 

def _fix_value(self, value):
        """
        Return a cleaned version of a value
        according to the specification:
        > Char	   ::=   	#x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]

        See https://www.w3.org/TR/xml/#charsets

        :param value: a value to clean
        :return: the cleaned value
        """
        if not self.__charrange or not self.__replacement:
            if sys.maxunicode == 0xFFFF:
                # Fix for python 2.x, surrogate pairs does not match in regex
                self.__charrange = re.compile(u'^([\u0020-\uD7FF\u0009\u000A\u000D\uE000-\uFFFD]|[\uD800-\uDBFF][\uDC00-\uDFFF])*$')
                # TODO: this regex is slightly wrong... surrogates are not matched as pairs.
                self.__replacement = re.compile(u'[^\u0020-\uDBFF\u0009\u000A\u000D\uE000-\uFFFD\uDC00-\uDFFF]')
            else:
                self.__charrange = re.compile(u'^[\u0020-\uD7FF\u0009\u000A\u000D\uE000-\uFFFD\U00010000-\U0010FFFF]*$')
                self.__replacement = re.compile(u'[^\u0020-\uD7FF\u0009\u000A\u000D\uE000-\uFFFD\U00010000-\U0010FFFF]')

        # Reading string until \x00. This is the same as aapt does.
        if "\x00" in value:
            self.packerwarning = True
            log.warning("Null byte found in attribute value at position {}: "
                        "Value(hex): '{}'".format(
                value.find("\x00"),
                binascii.hexlify(value.encode("utf-8"))))
            value = value[:value.find("\x00")]

        if not self.__charrange.match(value):
            log.warning("Invalid character in value found. Replacing with '_'.")
            self.packerwarning = True
            value = self.__replacement.sub('_', value)
        return value 

def get_abi_tag():
    """Return the ABI tag based on SOABI (if available) or emulate SOABI
    (CPython 2, PyPy)."""
    soabi = get_config_var('SOABI')
    impl = get_abbr_impl()
    if not soabi and impl in ('cp', 'pp') and hasattr(sys, 'maxunicode'):
        d = ''
        m = ''
        u = ''
        if get_flag('Py_DEBUG',
                    lambda: hasattr(sys, 'gettotalrefcount'),
                    warn=(impl == 'cp')):
            d = 'd'
        if get_flag('WITH_PYMALLOC',
                    lambda: impl == 'cp',
                    warn=(impl == 'cp')):
            m = 'm'
        if get_flag('Py_UNICODE_SIZE',
                    lambda: sys.maxunicode == 0x10ffff,
                    expected=4,
                    warn=(impl == 'cp' and
                          sys.version_info < (3, 3))) \
                and sys.version_info < (3, 3):
            u = 'u'
        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
    elif soabi and soabi.startswith('cpython-'):
        abi = 'cp' + soabi.split('-')[1]
    elif soabi:
        abi = soabi.replace('.', '_').replace('-', '_')
    else:
        abi = None
    return abi 

def test_4(self):
        "test unicode ranges"
        iters = 100000
        out = Grammar('root /[\U0001f300-\U0001f5ff]/{%d}' % iters).generate()
        if sys.maxunicode == 65535:
            out = {out[i:i+2] for i in range(0, len(out), 2)}
        else:
            out = set(out)
        self.assertEqual(set(out), set(unichr_(c) for c in range(0x1f300, 0x1f600))) 

def get_abi_tag():
    """Return the ABI tag based on SOABI (if available) or emulate SOABI
    (CPython 2, PyPy)."""
    soabi = get_config_var('SOABI')
    impl = get_abbr_impl()
    if not soabi and impl in ('cp', 'pp') and hasattr(sys, 'maxunicode'):
        d = ''
        m = ''
        u = ''
        if get_flag('Py_DEBUG',
                    lambda: hasattr(sys, 'gettotalrefcount'),
                    warn=(impl == 'cp')):
            d = 'd'
        if get_flag('WITH_PYMALLOC',
                    lambda: impl == 'cp',
                    warn=(impl == 'cp')):
            m = 'm'
        if get_flag('Py_UNICODE_SIZE',
                    lambda: sys.maxunicode == 0x10ffff,
                    expected=4,
                    warn=(impl == 'cp' and
                          sys.version_info < (3, 3))) \
                and sys.version_info < (3, 3):
            u = 'u'
        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
    elif soabi and soabi.startswith('cpython-'):
        abi = 'cp' + soabi.split('-')[1]
    elif soabi:
        abi = soabi.replace('.', '_').replace('-', '_')
    else:
        abi = None
    return abi 

def get_abi_tag():
    """Return the ABI tag based on SOABI (if available) or emulate SOABI
    (CPython 2, PyPy)."""
    soabi = get_config_var('SOABI')
    impl = get_abbr_impl()
    if not soabi and impl in ('cp', 'pp') and hasattr(sys, 'maxunicode'):
        d = ''
        m = ''
        u = ''
        if get_flag('Py_DEBUG',
                    lambda: hasattr(sys, 'gettotalrefcount'),
                    warn=(impl == 'cp')):
            d = 'd'
        if get_flag('WITH_PYMALLOC',
                    lambda: impl == 'cp',
                    warn=(impl == 'cp')):
            m = 'm'
        if get_flag('Py_UNICODE_SIZE',
                    lambda: sys.maxunicode == 0x10ffff,
                    expected=4,
                    warn=(impl == 'cp' and
                          sys.version_info < (3, 3))) \
                and sys.version_info < (3, 3):
            u = 'u'
        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
    elif soabi and soabi.startswith('cpython-'):
        abi = 'cp' + soabi.split('-')[1]
    elif soabi:
        abi = soabi.replace('.', '_').replace('-', '_')
    else:
        abi = None
    return abi 

def named_chars():
    for code in range(sys.maxunicode):
        char = chr(code)
        name = unicodedata.name(char, None)
        if name is not None:
            yield char, name 

def property_chars(self, prefix):
    return "".join(
        six.unichr(x)
        for x in range(sys.maxunicode)
        if unicodedata.category(six.unichr(x)).startswith(prefix)) 

def get_abi_tag():
    """Return the ABI tag based on SOABI (if available) or emulate SOABI
    (CPython 2, PyPy)."""
    soabi = get_config_var('SOABI')
    impl = get_abbr_impl()
    if not soabi and impl in ('cp', 'pp') and hasattr(sys, 'maxunicode'):
        d = ''
        m = ''
        u = ''
        if get_flag('Py_DEBUG',
                    lambda: hasattr(sys, 'gettotalrefcount'),
                    warn=(impl == 'cp')):
            d = 'd'
        if get_flag('WITH_PYMALLOC',
                    lambda: impl == 'cp',
                    warn=(impl == 'cp')):
            m = 'm'
        if get_flag('Py_UNICODE_SIZE',
                    lambda: sys.maxunicode == 0x10ffff,
                    expected=4,
                    warn=(impl == 'cp' and
                          sys.version_info < (3, 3))) \
                and sys.version_info < (3, 3):
            u = 'u'
        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
    elif soabi and soabi.startswith('cpython-'):
        abi = 'cp' + soabi.split('-')[1]
    elif soabi:
        abi = soabi.replace('.', '_').replace('-', '_')
    else:
        abi = None
    return abi 

def get_abi_tag():
    """Return the ABI tag based on SOABI (if available) or emulate SOABI
    (CPython 2, PyPy)."""
    soabi = get_config_var('SOABI')
    impl = get_abbr_impl()
    if not soabi and impl in ('cp', 'pp') and hasattr(sys, 'maxunicode'):
        d = ''
        m = ''
        u = ''
        if get_flag('Py_DEBUG',
                    lambda: hasattr(sys, 'gettotalrefcount'),
                    warn=(impl == 'cp')):
            d = 'd'
        if get_flag('WITH_PYMALLOC',
                    lambda: impl == 'cp',
                    warn=(impl == 'cp')):
            m = 'm'
        if get_flag('Py_UNICODE_SIZE',
                    lambda: sys.maxunicode == 0x10ffff,
                    expected=4,
                    warn=(impl == 'cp' and
                          sys.version_info < (3, 3))) \
                and sys.version_info < (3, 3):
            u = 'u'
        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
    elif soabi and soabi.startswith('cpython-'):
        abi = 'cp' + soabi.split('-')[1]
    elif soabi:
        abi = soabi.replace('.', '_').replace('-', '_')
    else:
        abi = None
    return abi 

def _fix_value(self, value):
        """
        Return a cleaned version of a value
        according to the specification:
        > Char	   ::=   	#x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]

        See https://www.w3.org/TR/xml/#charsets

        :param value: a value to clean
        :return: the cleaned value
        """
        if not self.__charrange or not self.__replacement:
            if sys.maxunicode == 0xFFFF:
                # Fix for python 2.x, surrogate pairs does not match in regex
                self.__charrange = re.compile(
                    u'^([\u0020-\uD7FF\u0009\u000A\u000D\uE000-\uFFFD]|[\uD800-\uDBFF][\uDC00-\uDFFF])*$')
                # TODO: this regex is slightly wrong... surrogates are not matched as pairs.
                self.__replacement = re.compile(u'[^\u0020-\uDBFF\u0009\u000A\u000D\uE000-\uFFFD\uDC00-\uDFFF]')
            else:
                self.__charrange = re.compile(u'^[\u0020-\uD7FF\u0009\u000A\u000D\uE000-\uFFFD\U00010000-\U0010FFFF]*$')
                self.__replacement = re.compile(u'[^\u0020-\uD7FF\u0009\u000A\u000D\uE000-\uFFFD\U00010000-\U0010FFFF]')

        # Reading string until \x00. This is the same as aapt does.
        if "\x00" in value:
            self.packerwarning = True
            log.warning(
                "Null byte found in attribute value at position {}: "
                "Value(hex): '{}'".format(
                    value.find("\x00"),
                    binascii.hexlify(value.encode("utf-8"))
                )
            )
            value = value[:value.find("\x00")]

        if not self.__charrange.match(value):
            log.warning("Invalid character in value found. Replacing with '_'.")
            self.packerwarning = True
            value = self.__replacement.sub('_', value)
        return value 

def get_abi_tag():
    """Return the ABI tag based on SOABI (if available) or emulate SOABI
    (CPython 2, PyPy)."""
    soabi = get_config_var('SOABI')
    impl = get_abbr_impl()
    if not soabi and impl in {'cp', 'pp'} and hasattr(sys, 'maxunicode'):
        d = ''
        m = ''
        u = ''
        if get_flag('Py_DEBUG',
                    lambda: hasattr(sys, 'gettotalrefcount'),
                    warn=(impl == 'cp')):
            d = 'd'
        if get_flag('WITH_PYMALLOC',
                    lambda: impl == 'cp',
                    warn=(impl == 'cp')):
            m = 'm'
        if get_flag('Py_UNICODE_SIZE',
                    lambda: sys.maxunicode == 0x10ffff,
                    expected=4,
                    warn=(impl == 'cp' and
                          six.PY2)) \
                and six.PY2:
            u = 'u'
        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
    elif soabi and soabi.startswith('cpython-'):
        abi = 'cp' + soabi.split('-')[1]
    elif soabi:
        abi = soabi.replace('.', '_').replace('-', '_')
    else:
        abi = None
    return abi 

def get_abi_tag(env):
    """Return the ABI tag based on SOABI (if available) or emulate SOABI
    (CPython 2, PyPy)."""
    soabi = env.config_var("SOABI")
    impl = get_abbr_impl(env)
    if not soabi and impl in ("cp", "pp") and hasattr(sys, "maxunicode"):
        d = ""
        m = ""
        u = ""
        if get_flag(
            env,
            "Py_DEBUG",
            lambda: hasattr(sys, "gettotalrefcount"),
            warn=(impl == "cp" and env.version_info < (3, 8)),
        ):
            d = "d"
        if env.version_info < (3, 8):
            if get_flag(
                env, "WITH_PYMALLOC", lambda: impl == "cp", warn=(impl == "cp")
            ):
                m = "m"
            if get_flag(
                env,
                "Py_UNICODE_SIZE",
                lambda: sys.maxunicode == 0x10FFFF,
                expected=4,
                warn=(impl == "cp" and env.version_info < (3, 3)),
            ) and env.version_info < (3, 3):
                u = "u"
        abi = "%s%s%s%s%s" % (impl, get_impl_ver(env), d, m, u)
    elif soabi and soabi.startswith("cpython-"):
        abi = "cp" + soabi.split("-")[1]
    elif soabi:
        abi = soabi.replace(".", "_").replace("-", "_")
    else:
        abi = None
    return abi 

def test_getattr(self):
        import sys
        self.assertTrue(getattr(sys, 'stdout') is sys.stdout)
        self.assertRaises(TypeError, getattr, sys, 1)
        self.assertRaises(TypeError, getattr, sys, 1, "foo")
        self.assertRaises(TypeError, getattr)
        if have_unicode:
            self.assertRaises(UnicodeError, getattr, sys, unichr(sys.maxunicode)) 

def test_ord(self):
        self.assertEqual(ord(' '), 32)
        self.assertEqual(ord('A'), 65)
        self.assertEqual(ord('a'), 97)
        if have_unicode:
            self.assertEqual(ord(unichr(sys.maxunicode)), sys.maxunicode)
        self.assertRaises(TypeError, ord, 42)
        if have_unicode:
            self.assertRaises(TypeError, ord, unicode("12")) 

def test_unichr(self):
        if have_unicode:
            self.assertEqual(unichr(32), unicode(' '))
            self.assertEqual(unichr(65), unicode('A'))
            self.assertEqual(unichr(97), unicode('a'))
            self.assertEqual(
                unichr(sys.maxunicode),
                unicode('\\U%08x' % (sys.maxunicode), 'unicode-escape')
            )
            self.assertRaises(ValueError, unichr, sys.maxunicode+1)
            self.assertRaises(TypeError, unichr)
            self.assertRaises((OverflowError, ValueError), unichr, 2**32)

    # We don't want self in vars(), so these are static methods 

def test_raiseMemError(self):
        # Ensure that the freelist contains a consistent object, even
        # when a string allocation fails with a MemoryError.
        # This used to crash the interpreter,
        # or leak references when the number was smaller.
        charwidth = 4 if sys.maxunicode >= 0x10000 else 2
        # Note: sys.maxsize is half of the actual max allocation because of
        # the signedness of Py_ssize_t.
        alloc = lambda: u"a" * (sys.maxsize // charwidth * 2)
        self.assertRaises(MemoryError, alloc)
        self.assertRaises(MemoryError, alloc) 

def test_decodeunicodeinternal(self):
        self.assertRaises(
            UnicodeDecodeError,
            "\x00\x00\x00\x00\x00".decode,
            "unicode-internal",
        )
        if sys.maxunicode > 0xffff:
            def handler_unicodeinternal(exc):
                if not isinstance(exc, UnicodeDecodeError):
                    raise TypeError("don't know how to handle %r" % exc)
                return (u"\x01", 1)

            self.assertEqual(
                "\x00\x00\x00\x00\x00".decode("unicode-internal", "ignore"),
                u"\u0000"
            )

            self.assertEqual(
                "\x00\x00\x00\x00\x00".decode("unicode-internal", "replace"),
                u"\u0000\ufffd"
            )

            codecs.register_error("test.hui", handler_unicodeinternal)

            self.assertEqual(
                "\x00\x00\x00\x00\x00".decode("unicode-internal", "test.hui"),
                u"\u0000\u0001\u0000"
            ) 

def test_unicodeencodeerror(self):
        self.check_exceptionobjectargs(
            UnicodeEncodeError,
            ["ascii", u"g\xfcrk", 1, 2, "ouch"],
            "'ascii' codec can't encode character u'\\xfc' in position 1: ouch"
        )
        self.check_exceptionobjectargs(
            UnicodeEncodeError,
            ["ascii", u"g\xfcrk", 1, 4, "ouch"],
            "'ascii' codec can't encode characters in position 1-3: ouch"
        )
        self.check_exceptionobjectargs(
            UnicodeEncodeError,
            ["ascii", u"\xfcx", 0, 1, "ouch"],
            "'ascii' codec can't encode character u'\\xfc' in position 0: ouch"
        )
        self.check_exceptionobjectargs(
            UnicodeEncodeError,
            ["ascii", u"\u0100x", 0, 1, "ouch"],
            "'ascii' codec can't encode character u'\\u0100' in position 0: ouch"
        )
        self.check_exceptionobjectargs(
            UnicodeEncodeError,
            ["ascii", u"\uffffx", 0, 1, "ouch"],
            "'ascii' codec can't encode character u'\\uffff' in position 0: ouch"
        )
        if sys.maxunicode > 0xffff:
            self.check_exceptionobjectargs(
                UnicodeEncodeError,
                ["ascii", u"\U00010000x", 0, 1, "ouch"],
                "'ascii' codec can't encode character u'\\U00010000' in position 0: ouch"
            )