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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
audiodata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
capath	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
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mapping_tests.py	21.49 KB	-rw-r--r--	2021-09-24 12:03
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mod_generics_cache.py	224 B	-rw-r--r--	2021-09-24 12:03
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sample_doctest_no_docstrings.py	227 B	-rw-r--r--	2021-09-24 12:03
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test_funcattrs.py	12.7 KB	-rw-r--r--	2021-09-24 12:03
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test_zipfile64.py	5.72 KB	-rw-r--r--	2021-09-24 12:03
test_zipimport.py	26.9 KB	-rw-r--r--	2021-09-24 12:03
test_zipimport_support.py	10.47 KB	-rw-r--r--	2021-09-24 12:03
test_zlib.py	32.46 KB	-rw-r--r--	2021-09-24 12:03
testcodec.py	1.02 KB	-rw-r--r--	2021-09-24 12:03
testtar.tar	425 KB	-rw-r--r--	2019-11-02 02:32
tf_inherit_check.py	714 B	-rw-r--r--	2021-09-24 12:03
threaded_import_hangers.py	1.45 KB	-rw-r--r--	2021-09-24 12:03
time_hashlib.py	2.83 KB	-rw-r--r--	2021-09-24 12:03
tokenize_tests-latin1-coding-cookie-and-utf8-bom-sig.txt	444 B	-rw-r--r--	2019-11-02 02:32
tokenize_tests-no-coding-cookie-and-utf8-bom-sig-only.txt	303 B	-rw-r--r--	2019-11-02 02:32
tokenize_tests-utf8-coding-cookie-and-no-utf8-bom-sig.txt	421 B	-rw-r--r--	2019-11-02 02:32
tokenize_tests-utf8-coding-cookie-and-utf8-bom-sig.txt	327 B	-rw-r--r--	2019-11-02 02:32
tokenize_tests.txt	2.65 KB	-rw-r--r--	2019-11-02 02:32
win_console_handler.py	1.38 KB	-rw-r--r--	2021-09-24 12:03
wrongcert.pem	1.84 KB	-rw-r--r--	2019-11-02 02:32
xmltests.py	499 B	-rw-r--r--	2021-09-24 12:03
zip_cp437_header.zip	270 B	-rw-r--r--	2019-11-02 02:32
zipdir.zip	374 B	-rw-r--r--	2019-11-02 02:32

Rename

# Python test set -- part 5, built-in exceptions

import copy
import os
import sys
import unittest
import pickle
import weakref
import errno

from test.support import (TESTFN, captured_stderr, check_impl_detail,
                          check_warnings, cpython_only, gc_collect, run_unittest,
                          no_tracing, unlink, import_module)

class NaiveException(Exception):
    def __init__(self, x):
        self.x = x

class SlottedNaiveException(Exception):
    __slots__ = ('x',)
    def __init__(self, x):
        self.x = x

class BrokenStrException(Exception):
    def __str__(self):
        raise Exception("str() is broken")

# XXX This is not really enough, each *operation* should be tested!

class ExceptionTests(unittest.TestCase):

def raise_catch(self, exc, excname):
        try:
            raise exc("spam")
        except exc as err:
            buf1 = str(err)
        try:
            raise exc("spam")
        except exc as err:
            buf2 = str(err)
        self.assertEqual(buf1, buf2)
        self.assertEqual(exc.__name__, excname)

def testRaising(self):
        self.raise_catch(AttributeError, "AttributeError")
        self.assertRaises(AttributeError, getattr, sys, "undefined_attribute")

self.raise_catch(EOFError, "EOFError")
        fp = open(TESTFN, 'w')
        fp.close()
        fp = open(TESTFN, 'r')
        savestdin = sys.stdin
        try:
            try:
                import marshal
                marshal.loads(b'')
            except EOFError:
                pass
        finally:
            sys.stdin = savestdin
            fp.close()
            unlink(TESTFN)

self.raise_catch(OSError, "OSError")
        self.assertRaises(OSError, open, 'this file does not exist', 'r')

self.raise_catch(ImportError, "ImportError")
        self.assertRaises(ImportError, __import__, "undefined_module")

self.raise_catch(IndexError, "IndexError")
        x = []
        self.assertRaises(IndexError, x.__getitem__, 10)

self.raise_catch(KeyError, "KeyError")
        x = {}
        self.assertRaises(KeyError, x.__getitem__, 'key')

self.raise_catch(KeyboardInterrupt, "KeyboardInterrupt")

self.raise_catch(MemoryError, "MemoryError")

self.raise_catch(NameError, "NameError")
        try: x = undefined_variable
        except NameError: pass

self.raise_catch(OverflowError, "OverflowError")
        x = 1
        for dummy in range(128):
            x += x  # this simply shouldn't blow up

self.raise_catch(RuntimeError, "RuntimeError")
        self.raise_catch(RecursionError, "RecursionError")

self.raise_catch(SyntaxError, "SyntaxError")
        try: exec('/\n')
        except SyntaxError: pass

self.raise_catch(IndentationError, "IndentationError")

self.raise_catch(TabError, "TabError")
        try: compile("try:\n\t1/0\n    \t1/0\nfinally:\n pass\n",
                     '<string>', 'exec')
        except TabError: pass
        else: self.fail("TabError not raised")

self.raise_catch(SystemError, "SystemError")

self.raise_catch(SystemExit, "SystemExit")
        self.assertRaises(SystemExit, sys.exit, 0)

self.raise_catch(TypeError, "TypeError")
        try: [] + ()
        except TypeError: pass

self.raise_catch(ValueError, "ValueError")
        self.assertRaises(ValueError, chr, 17<<16)

self.raise_catch(ZeroDivisionError, "ZeroDivisionError")
        try: x = 1/0
        except ZeroDivisionError: pass

self.raise_catch(Exception, "Exception")
        try: x = 1/0
        except Exception as e: pass

self.raise_catch(StopAsyncIteration, "StopAsyncIteration")

def testSyntaxErrorMessage(self):
        # make sure the right exception message is raised for each of
        # these code fragments

def ckmsg(src, msg):
            try:
                compile(src, '<fragment>', 'exec')
            except SyntaxError as e:
                if e.msg != msg:
                    self.fail("expected %s, got %s" % (msg, e.msg))
            else:
                self.fail("failed to get expected SyntaxError")

s = '''while 1:
            try:
                pass
            finally:
                continue'''

if not sys.platform.startswith('java'):
            ckmsg(s, "'continue' not supported inside 'finally' clause")

s = '''if 1:
        try:
            continue
        except:
            pass'''

ckmsg(s, "'continue' not properly in loop")
        ckmsg("continue\n", "'continue' not properly in loop")

def testSyntaxErrorOffset(self):
        def check(src, lineno, offset):
            with self.assertRaises(SyntaxError) as cm:
                compile(src, '<fragment>', 'exec')
            self.assertEqual(cm.exception.lineno, lineno)
            self.assertEqual(cm.exception.offset, offset)

check('def fact(x):\n\treturn x!\n', 2, 10)
        check('1 +\n', 1, 4)
        check('def spam():\n  print(1)\n print(2)', 3, 10)
        check('Python = "Python" +', 1, 20)
        check('Python = "\u1e54\xfd\u0163\u0125\xf2\xf1" +', 1, 20)

@cpython_only
    def testSettingException(self):
        # test that setting an exception at the C level works even if the
        # exception object can't be constructed.

class BadException(Exception):
            def __init__(self_):
                raise RuntimeError("can't instantiate BadException")

class InvalidException:
            pass

def test_capi1():
            import _testcapi
            try:
                _testcapi.raise_exception(BadException, 1)
            except TypeError as err:
                exc, err, tb = sys.exc_info()
                co = tb.tb_frame.f_code
                self.assertEqual(co.co_name, "test_capi1")
                self.assertTrue(co.co_filename.endswith('test_exceptions.py'))
            else:
                self.fail("Expected exception")

def test_capi2():
            import _testcapi
            try:
                _testcapi.raise_exception(BadException, 0)
            except RuntimeError as err:
                exc, err, tb = sys.exc_info()
                co = tb.tb_frame.f_code
                self.assertEqual(co.co_name, "__init__")
                self.assertTrue(co.co_filename.endswith('test_exceptions.py'))
                co2 = tb.tb_frame.f_back.f_code
                self.assertEqual(co2.co_name, "test_capi2")
            else:
                self.fail("Expected exception")

def test_capi3():
            import _testcapi
            self.assertRaises(SystemError, _testcapi.raise_exception,
                              InvalidException, 1)

if not sys.platform.startswith('java'):
            test_capi1()
            test_capi2()
            test_capi3()

def test_WindowsError(self):
        try:
            WindowsError
        except NameError:
            pass
        else:
            self.assertIs(WindowsError, OSError)
            self.assertEqual(str(OSError(1001)), "1001")
            self.assertEqual(str(OSError(1001, "message")),
                             "[Errno 1001] message")
            # POSIX errno (9 aka EBADF) is untranslated
            w = OSError(9, 'foo', 'bar')
            self.assertEqual(w.errno, 9)
            self.assertEqual(w.winerror, None)
            self.assertEqual(str(w), "[Errno 9] foo: 'bar'")
            # ERROR_PATH_NOT_FOUND (win error 3) becomes ENOENT (2)
            w = OSError(0, 'foo', 'bar', 3)
            self.assertEqual(w.errno, 2)
            self.assertEqual(w.winerror, 3)
            self.assertEqual(w.strerror, 'foo')
            self.assertEqual(w.filename, 'bar')
            self.assertEqual(w.filename2, None)
            self.assertEqual(str(w), "[WinError 3] foo: 'bar'")
            # Unknown win error becomes EINVAL (22)
            w = OSError(0, 'foo', None, 1001)
            self.assertEqual(w.errno, 22)
            self.assertEqual(w.winerror, 1001)
            self.assertEqual(w.strerror, 'foo')
            self.assertEqual(w.filename, None)
            self.assertEqual(w.filename2, None)
            self.assertEqual(str(w), "[WinError 1001] foo")
            # Non-numeric "errno"
            w = OSError('bar', 'foo')
            self.assertEqual(w.errno, 'bar')
            self.assertEqual(w.winerror, None)
            self.assertEqual(w.strerror, 'foo')
            self.assertEqual(w.filename, None)
            self.assertEqual(w.filename2, None)

@unittest.skipUnless(sys.platform == 'win32',
                         'test specific to Windows')
    def test_windows_message(self):
        """Should fill in unknown error code in Windows error message"""
        ctypes = import_module('ctypes')
        # this error code has no message, Python formats it as hexadecimal
        code = 3765269347
        with self.assertRaisesRegex(OSError, 'Windows Error 0x%x' % code):
            ctypes.pythonapi.PyErr_SetFromWindowsErr(code)

def testAttributes(self):
        # test that exception attributes are happy

exceptionList = [
            (BaseException, (), {'args' : ()}),
            (BaseException, (1, ), {'args' : (1,)}),
            (BaseException, ('foo',),
                {'args' : ('foo',)}),
            (BaseException, ('foo', 1),
                {'args' : ('foo', 1)}),
            (SystemExit, ('foo',),
                {'args' : ('foo',), 'code' : 'foo'}),
            (OSError, ('foo',),
                {'args' : ('foo',), 'filename' : None, 'filename2' : None,
                 'errno' : None, 'strerror' : None}),
            (OSError, ('foo', 'bar'),
                {'args' : ('foo', 'bar'),
                 'filename' : None, 'filename2' : None,
                 'errno' : 'foo', 'strerror' : 'bar'}),
            (OSError, ('foo', 'bar', 'baz'),
                {'args' : ('foo', 'bar'),
                 'filename' : 'baz', 'filename2' : None,
                 'errno' : 'foo', 'strerror' : 'bar'}),
            (OSError, ('foo', 'bar', 'baz', None, 'quux'),
                {'args' : ('foo', 'bar'), 'filename' : 'baz', 'filename2': 'quux'}),
            (OSError, ('errnoStr', 'strErrorStr', 'filenameStr'),
                {'args' : ('errnoStr', 'strErrorStr'),
                 'strerror' : 'strErrorStr', 'errno' : 'errnoStr',
                 'filename' : 'filenameStr'}),
            (OSError, (1, 'strErrorStr', 'filenameStr'),
                {'args' : (1, 'strErrorStr'), 'errno' : 1,
                 'strerror' : 'strErrorStr',
                 'filename' : 'filenameStr', 'filename2' : None}),
            (SyntaxError, (), {'msg' : None, 'text' : None,
                'filename' : None, 'lineno' : None, 'offset' : None,
                'print_file_and_line' : None}),
            (SyntaxError, ('msgStr',),
                {'args' : ('msgStr',), 'text' : None,
                 'print_file_and_line' : None, 'msg' : 'msgStr',
                 'filename' : None, 'lineno' : None, 'offset' : None}),
            (SyntaxError, ('msgStr', ('filenameStr', 'linenoStr', 'offsetStr',
                           'textStr')),
                {'offset' : 'offsetStr', 'text' : 'textStr',
                 'args' : ('msgStr', ('filenameStr', 'linenoStr',
                                      'offsetStr', 'textStr')),
                 'print_file_and_line' : None, 'msg' : 'msgStr',
                 'filename' : 'filenameStr', 'lineno' : 'linenoStr'}),
            (SyntaxError, ('msgStr', 'filenameStr', 'linenoStr', 'offsetStr',
                           'textStr', 'print_file_and_lineStr'),
                {'text' : None,
                 'args' : ('msgStr', 'filenameStr', 'linenoStr', 'offsetStr',
                           'textStr', 'print_file_and_lineStr'),
                 'print_file_and_line' : None, 'msg' : 'msgStr',
                 'filename' : None, 'lineno' : None, 'offset' : None}),
            (UnicodeError, (), {'args' : (),}),
            (UnicodeEncodeError, ('ascii', 'a', 0, 1,
                                  'ordinal not in range'),
                {'args' : ('ascii', 'a', 0, 1,
                                           'ordinal not in range'),
                 'encoding' : 'ascii', 'object' : 'a',
                 'start' : 0, 'reason' : 'ordinal not in range'}),
            (UnicodeDecodeError, ('ascii', bytearray(b'\xff'), 0, 1,
                                  'ordinal not in range'),
                {'args' : ('ascii', bytearray(b'\xff'), 0, 1,
                                           'ordinal not in range'),
                 'encoding' : 'ascii', 'object' : b'\xff',
                 'start' : 0, 'reason' : 'ordinal not in range'}),
            (UnicodeDecodeError, ('ascii', b'\xff', 0, 1,
                                  'ordinal not in range'),
                {'args' : ('ascii', b'\xff', 0, 1,
                                           'ordinal not in range'),
                 'encoding' : 'ascii', 'object' : b'\xff',
                 'start' : 0, 'reason' : 'ordinal not in range'}),
            (UnicodeTranslateError, ("\u3042", 0, 1, "ouch"),
                {'args' : ('\u3042', 0, 1, 'ouch'),
                 'object' : '\u3042', 'reason' : 'ouch',
                 'start' : 0, 'end' : 1}),
            (NaiveException, ('foo',),
                {'args': ('foo',), 'x': 'foo'}),
            (SlottedNaiveException, ('foo',),
                {'args': ('foo',), 'x': 'foo'}),
        ]
        try:
            # More tests are in test_WindowsError
            exceptionList.append(
                (WindowsError, (1, 'strErrorStr', 'filenameStr'),
                    {'args' : (1, 'strErrorStr'),
                     'strerror' : 'strErrorStr', 'winerror' : None,
                     'errno' : 1,
                     'filename' : 'filenameStr', 'filename2' : None})
            )
        except NameError:
            pass

for exc, args, expected in exceptionList:
            try:
                e = exc(*args)
            except:
                print("\nexc=%r, args=%r" % (exc, args), file=sys.stderr)
                raise
            else:
                # Verify module name
                if not type(e).__name__.endswith('NaiveException'):
                    self.assertEqual(type(e).__module__, 'builtins')
                # Verify no ref leaks in Exc_str()
                s = str(e)
                for checkArgName in expected:
                    value = getattr(e, checkArgName)
                    self.assertEqual(repr(value),
                                     repr(expected[checkArgName]),
                                     '%r.%s == %r, expected %r' % (
                                     e, checkArgName,
                                     value, expected[checkArgName]))

# test for pickling support
                for p in [pickle]:
                    for protocol in range(p.HIGHEST_PROTOCOL + 1):
                        s = p.dumps(e, protocol)
                        new = p.loads(s)
                        for checkArgName in expected:
                            got = repr(getattr(new, checkArgName))
                            want = repr(expected[checkArgName])
                            self.assertEqual(got, want,
                                             'pickled "%r", attribute "%s' %
                                             (e, checkArgName))

def testWithTraceback(self):
        try:
            raise IndexError(4)
        except:
            tb = sys.exc_info()[2]

e = BaseException().with_traceback(tb)
        self.assertIsInstance(e, BaseException)
        self.assertEqual(e.__traceback__, tb)

e = IndexError(5).with_traceback(tb)
        self.assertIsInstance(e, IndexError)
        self.assertEqual(e.__traceback__, tb)

class MyException(Exception):
            pass

e = MyException().with_traceback(tb)
        self.assertIsInstance(e, MyException)
        self.assertEqual(e.__traceback__, tb)

def testInvalidTraceback(self):
        try:
            Exception().__traceback__ = 5
        except TypeError as e:
            self.assertIn("__traceback__ must be a traceback", str(e))
        else:
            self.fail("No exception raised")

def testInvalidAttrs(self):
        self.assertRaises(TypeError, setattr, Exception(), '__cause__', 1)
        self.assertRaises(TypeError, delattr, Exception(), '__cause__')
        self.assertRaises(TypeError, setattr, Exception(), '__context__', 1)
        self.assertRaises(TypeError, delattr, Exception(), '__context__')

def testNoneClearsTracebackAttr(self):
        try:
            raise IndexError(4)
        except:
            tb = sys.exc_info()[2]

e = Exception()
        e.__traceback__ = tb
        e.__traceback__ = None
        self.assertEqual(e.__traceback__, None)

def testChainingAttrs(self):
        e = Exception()
        self.assertIsNone(e.__context__)
        self.assertIsNone(e.__cause__)

e = TypeError()
        self.assertIsNone(e.__context__)
        self.assertIsNone(e.__cause__)

class MyException(OSError):
            pass

e = MyException()
        self.assertIsNone(e.__context__)
        self.assertIsNone(e.__cause__)

def testChainingDescriptors(self):
        try:
            raise Exception()
        except Exception as exc:
            e = exc

self.assertIsNone(e.__context__)
        self.assertIsNone(e.__cause__)
        self.assertFalse(e.__suppress_context__)

e.__context__ = NameError()
        e.__cause__ = None
        self.assertIsInstance(e.__context__, NameError)
        self.assertIsNone(e.__cause__)
        self.assertTrue(e.__suppress_context__)
        e.__suppress_context__ = False
        self.assertFalse(e.__suppress_context__)

def testKeywordArgs(self):
        # test that builtin exception don't take keyword args,
        # but user-defined subclasses can if they want
        self.assertRaises(TypeError, BaseException, a=1)

class DerivedException(BaseException):
            def __init__(self, fancy_arg):
                BaseException.__init__(self)
                self.fancy_arg = fancy_arg

x = DerivedException(fancy_arg=42)
        self.assertEqual(x.fancy_arg, 42)

@no_tracing
    def testInfiniteRecursion(self):
        def f():
            return f()
        self.assertRaises(RecursionError, f)

def g():
            try:
                return g()
            except ValueError:
                return -1
        self.assertRaises(RecursionError, g)

def test_str(self):
        # Make sure both instances and classes have a str representation.
        self.assertTrue(str(Exception))
        self.assertTrue(str(Exception('a')))
        self.assertTrue(str(Exception('a', 'b')))

def testExceptionCleanupNames(self):
        # Make sure the local variable bound to the exception instance by
        # an "except" statement is only visible inside the except block.
        try:
            raise Exception()
        except Exception as e:
            self.assertTrue(e)
            del e
        self.assertNotIn('e', locals())

def testExceptionCleanupState(self):
        # Make sure exception state is cleaned up as soon as the except
        # block is left. See #2507

class MyException(Exception):
            def __init__(self, obj):
                self.obj = obj
        class MyObj:
            pass

def inner_raising_func():
            # Create some references in exception value and traceback
            local_ref = obj
            raise MyException(obj)

# Qualified "except" with "as"
        obj = MyObj()
        wr = weakref.ref(obj)
        try:
            inner_raising_func()
        except MyException as e:
            pass
        obj = None
        obj = wr()
        self.assertTrue(obj is None, "%s" % obj)

# Qualified "except" without "as"
        obj = MyObj()
        wr = weakref.ref(obj)
        try:
            inner_raising_func()
        except MyException:
            pass
        obj = None
        obj = wr()
        self.assertTrue(obj is None, "%s" % obj)

# Bare "except"
        obj = MyObj()
        wr = weakref.ref(obj)
        try:
            inner_raising_func()
        except:
            pass
        obj = None
        obj = wr()
        self.assertTrue(obj is None, "%s" % obj)

# "except" with premature block leave
        obj = MyObj()
        wr = weakref.ref(obj)
        for i in [0]:
            try:
                inner_raising_func()
            except:
                break
        obj = None
        obj = wr()
        self.assertTrue(obj is None, "%s" % obj)

# "except" block raising another exception
        obj = MyObj()
        wr = weakref.ref(obj)
        try:
            try:
                inner_raising_func()
            except:
                raise KeyError
        except KeyError as e:
            # We want to test that the except block above got rid of
            # the exception raised in inner_raising_func(), but it
            # also ends up in the __context__ of the KeyError, so we
            # must clear the latter manually for our test to succeed.
            e.__context__ = None
            obj = None
            obj = wr()
            # guarantee no ref cycles on CPython (don't gc_collect)
            if check_impl_detail(cpython=False):
                gc_collect()
            self.assertTrue(obj is None, "%s" % obj)

# Some complicated construct
        obj = MyObj()
        wr = weakref.ref(obj)
        try:
            inner_raising_func()
        except MyException:
            try:
                try:
                    raise
                finally:
                    raise
            except MyException:
                pass
        obj = None
        if check_impl_detail(cpython=False):
            gc_collect()
        obj = wr()
        self.assertTrue(obj is None, "%s" % obj)

# Inside an exception-silencing "with" block
        class Context:
            def __enter__(self):
                return self
            def __exit__ (self, exc_type, exc_value, exc_tb):
                return True
        obj = MyObj()
        wr = weakref.ref(obj)
        with Context():
            inner_raising_func()
        obj = None
        if check_impl_detail(cpython=False):
            gc_collect()
        obj = wr()
        self.assertTrue(obj is None, "%s" % obj)

def test_exception_target_in_nested_scope(self):
        # issue 4617: This used to raise a SyntaxError
        # "can not delete variable 'e' referenced in nested scope"
        def print_error():
            e
        try:
            something
        except Exception as e:
            print_error()
            # implicit "del e" here

def test_generator_leaking(self):
        # Test that generator exception state doesn't leak into the calling
        # frame
        def yield_raise():
            try:
                raise KeyError("caught")
            except KeyError:
                yield sys.exc_info()[0]
                yield sys.exc_info()[0]
            yield sys.exc_info()[0]
        g = yield_raise()
        self.assertEqual(next(g), KeyError)
        self.assertEqual(sys.exc_info()[0], None)
        self.assertEqual(next(g), KeyError)
        self.assertEqual(sys.exc_info()[0], None)
        self.assertEqual(next(g), None)

# Same test, but inside an exception handler
        try:
            raise TypeError("foo")
        except TypeError:
            g = yield_raise()
            self.assertEqual(next(g), KeyError)
            self.assertEqual(sys.exc_info()[0], TypeError)
            self.assertEqual(next(g), KeyError)
            self.assertEqual(sys.exc_info()[0], TypeError)
            self.assertEqual(next(g), TypeError)
            del g
            self.assertEqual(sys.exc_info()[0], TypeError)

def test_generator_leaking2(self):
        # See issue 12475.
        def g():
            yield
        try:
            raise RuntimeError
        except RuntimeError:
            it = g()
            next(it)
        try:
            next(it)
        except StopIteration:
            pass
        self.assertEqual(sys.exc_info(), (None, None, None))

def test_generator_leaking3(self):
        # See issue #23353.  When gen.throw() is called, the caller's
        # exception state should be save and restored.
        def g():
            try:
                yield
            except ZeroDivisionError:
                yield sys.exc_info()[1]
        it = g()
        next(it)
        try:
            1/0
        except ZeroDivisionError as e:
            self.assertIs(sys.exc_info()[1], e)
            gen_exc = it.throw(e)
            self.assertIs(sys.exc_info()[1], e)
            self.assertIs(gen_exc, e)
        self.assertEqual(sys.exc_info(), (None, None, None))

def test_generator_leaking4(self):
        # See issue #23353.  When an exception is raised by a generator,
        # the caller's exception state should still be restored.
        def g():
            try:
                1/0
            except ZeroDivisionError:
                yield sys.exc_info()[0]
                raise
        it = g()
        try:
            raise TypeError
        except TypeError:
            # The caller's exception state (TypeError) is temporarily
            # saved in the generator.
            tp = next(it)
        self.assertIs(tp, ZeroDivisionError)
        try:
            next(it)
            # We can't check it immediately, but while next() returns
            # with an exception, it shouldn't have restored the old
            # exception state (TypeError).
        except ZeroDivisionError as e:
            self.assertIs(sys.exc_info()[1], e)
        # We used to find TypeError here.
        self.assertEqual(sys.exc_info(), (None, None, None))

def test_generator_doesnt_retain_old_exc(self):
        def g():
            self.assertIsInstance(sys.exc_info()[1], RuntimeError)
            yield
            self.assertEqual(sys.exc_info(), (None, None, None))
        it = g()
        try:
            raise RuntimeError
        except RuntimeError:
            next(it)
        self.assertRaises(StopIteration, next, it)

def test_generator_finalizing_and_exc_info(self):
        # See #7173
        def simple_gen():
            yield 1
        def run_gen():
            gen = simple_gen()
            try:
                raise RuntimeError
            except RuntimeError:
                return next(gen)
        run_gen()
        gc_collect()
        self.assertEqual(sys.exc_info(), (None, None, None))

def _check_generator_cleanup_exc_state(self, testfunc):
        # Issue #12791: exception state is cleaned up as soon as a generator
        # is closed (reference cycles are broken).
        class MyException(Exception):
            def __init__(self, obj):
                self.obj = obj
        class MyObj:
            pass

def raising_gen():
            try:
                raise MyException(obj)
            except MyException:
                yield

obj = MyObj()
        wr = weakref.ref(obj)
        g = raising_gen()
        next(g)
        testfunc(g)
        g = obj = None
        obj = wr()
        self.assertIs(obj, None)

def test_generator_throw_cleanup_exc_state(self):
        def do_throw(g):
            try:
                g.throw(RuntimeError())
            except RuntimeError:
                pass
        self._check_generator_cleanup_exc_state(do_throw)

def test_generator_close_cleanup_exc_state(self):
        def do_close(g):
            g.close()
        self._check_generator_cleanup_exc_state(do_close)

def test_generator_del_cleanup_exc_state(self):
        def do_del(g):
            g = None
        self._check_generator_cleanup_exc_state(do_del)

def test_generator_next_cleanup_exc_state(self):
        def do_next(g):
            try:
                next(g)
            except StopIteration:
                pass
            else:
                self.fail("should have raised StopIteration")
        self._check_generator_cleanup_exc_state(do_next)

def test_generator_send_cleanup_exc_state(self):
        def do_send(g):
            try:
                g.send(None)
            except StopIteration:
                pass
            else:
                self.fail("should have raised StopIteration")
        self._check_generator_cleanup_exc_state(do_send)

def test_3114(self):
        # Bug #3114: in its destructor, MyObject retrieves a pointer to
        # obsolete and/or deallocated objects.
        class MyObject:
            def __del__(self):
                nonlocal e
                e = sys.exc_info()
        e = ()
        try:
            raise Exception(MyObject())
        except:
            pass
        self.assertEqual(e, (None, None, None))

def test_unicode_change_attributes(self):
        # See issue 7309. This was a crasher.

u = UnicodeEncodeError('baz', 'xxxxx', 1, 5, 'foo')
        self.assertEqual(str(u), "'baz' codec can't encode characters in position 1-4: foo")
        u.end = 2
        self.assertEqual(str(u), "'baz' codec can't encode character '\\x78' in position 1: foo")
        u.end = 5
        u.reason = 0x345345345345345345
        self.assertEqual(str(u), "'baz' codec can't encode characters in position 1-4: 965230951443685724997")
        u.encoding = 4000
        self.assertEqual(str(u), "'4000' codec can't encode characters in position 1-4: 965230951443685724997")
        u.start = 1000
        self.assertEqual(str(u), "'4000' codec can't encode characters in position 1000-4: 965230951443685724997")

u = UnicodeDecodeError('baz', b'xxxxx', 1, 5, 'foo')
        self.assertEqual(str(u), "'baz' codec can't decode bytes in position 1-4: foo")
        u.end = 2
        self.assertEqual(str(u), "'baz' codec can't decode byte 0x78 in position 1: foo")
        u.end = 5
        u.reason = 0x345345345345345345
        self.assertEqual(str(u), "'baz' codec can't decode bytes in position 1-4: 965230951443685724997")
        u.encoding = 4000
        self.assertEqual(str(u), "'4000' codec can't decode bytes in position 1-4: 965230951443685724997")
        u.start = 1000
        self.assertEqual(str(u), "'4000' codec can't decode bytes in position 1000-4: 965230951443685724997")

u = UnicodeTranslateError('xxxx', 1, 5, 'foo')
        self.assertEqual(str(u), "can't translate characters in position 1-4: foo")
        u.end = 2
        self.assertEqual(str(u), "can't translate character '\\x78' in position 1: foo")
        u.end = 5
        u.reason = 0x345345345345345345
        self.assertEqual(str(u), "can't translate characters in position 1-4: 965230951443685724997")
        u.start = 1000
        self.assertEqual(str(u), "can't translate characters in position 1000-4: 965230951443685724997")

def test_unicode_errors_no_object(self):
        # See issue #21134.
        klasses = UnicodeEncodeError, UnicodeDecodeError, UnicodeTranslateError
        for klass in klasses:
            self.assertEqual(str(klass.__new__(klass)), "")

@no_tracing
    def test_badisinstance(self):
        # Bug #2542: if issubclass(e, MyException) raises an exception,
        # it should be ignored
        class Meta(type):
            def __subclasscheck__(cls, subclass):
                raise ValueError()
        class MyException(Exception, metaclass=Meta):
            pass

with captured_stderr() as stderr:
            try:
                raise KeyError()
            except MyException as e:
                self.fail("exception should not be a MyException")
            except KeyError:
                pass
            except:
                self.fail("Should have raised KeyError")
            else:
                self.fail("Should have raised KeyError")

def g():
            try:
                return g()
            except RecursionError:
                return sys.exc_info()
        e, v, tb = g()
        self.assertTrue(isinstance(v, RecursionError), type(v))
        self.assertIn("maximum recursion depth exceeded", str(v))

@cpython_only
    def test_MemoryError(self):
        # PyErr_NoMemory always raises the same exception instance.
        # Check that the traceback is not doubled.
        import traceback
        from _testcapi import raise_memoryerror
        def raiseMemError():
            try:
                raise_memoryerror()
            except MemoryError as e:
                tb = e.__traceback__
            else:
                self.fail("Should have raises a MemoryError")
            return traceback.format_tb(tb)

tb1 = raiseMemError()
        tb2 = raiseMemError()
        self.assertEqual(tb1, tb2)

@cpython_only
    def test_exception_with_doc(self):
        import _testcapi
        doc2 = "This is a test docstring."
        doc4 = "This is another test docstring."

self.assertRaises(SystemError, _testcapi.make_exception_with_doc,
                          "error1")

# test basic usage of PyErr_NewException
        error1 = _testcapi.make_exception_with_doc("_testcapi.error1")
        self.assertIs(type(error1), type)
        self.assertTrue(issubclass(error1, Exception))
        self.assertIsNone(error1.__doc__)

# test with given docstring
        error2 = _testcapi.make_exception_with_doc("_testcapi.error2", doc2)
        self.assertEqual(error2.__doc__, doc2)

# test with explicit base (without docstring)
        error3 = _testcapi.make_exception_with_doc("_testcapi.error3",
                                                   base=error2)
        self.assertTrue(issubclass(error3, error2))

# test with explicit base tuple
        class C(object):
            pass
        error4 = _testcapi.make_exception_with_doc("_testcapi.error4", doc4,
                                                   (error3, C))
        self.assertTrue(issubclass(error4, error3))
        self.assertTrue(issubclass(error4, C))
        self.assertEqual(error4.__doc__, doc4)

# test with explicit dictionary
        error5 = _testcapi.make_exception_with_doc("_testcapi.error5", "",
                                                   error4, {'a': 1})
        self.assertTrue(issubclass(error5, error4))
        self.assertEqual(error5.a, 1)
        self.assertEqual(error5.__doc__, "")

@cpython_only
    def test_memory_error_cleanup(self):
        # Issue #5437: preallocated MemoryError instances should not keep
        # traceback objects alive.
        from _testcapi import raise_memoryerror
        class C:
            pass
        wr = None
        def inner():
            nonlocal wr
            c = C()
            wr = weakref.ref(c)
            raise_memoryerror()
        # We cannot use assertRaises since it manually deletes the traceback
        try:
            inner()
        except MemoryError as e:
            self.assertNotEqual(wr(), None)
        else:
            self.fail("MemoryError not raised")
        self.assertEqual(wr(), None)

@no_tracing
    def test_recursion_error_cleanup(self):
        # Same test as above, but with "recursion exceeded" errors
        class C:
            pass
        wr = None
        def inner():
            nonlocal wr
            c = C()
            wr = weakref.ref(c)
            inner()
        # We cannot use assertRaises since it manually deletes the traceback
        try:
            inner()
        except RecursionError as e:
            self.assertNotEqual(wr(), None)
        else:
            self.fail("RecursionError not raised")
        self.assertEqual(wr(), None)

def test_errno_ENOTDIR(self):
        # Issue #12802: "not a directory" errors are ENOTDIR even on Windows
        with self.assertRaises(OSError) as cm:
            os.listdir(__file__)
        self.assertEqual(cm.exception.errno, errno.ENOTDIR, cm.exception)

def test_unraisable(self):
        # Issue #22836: PyErr_WriteUnraisable() should give sensible reports
        class BrokenDel:
            def __del__(self):
                exc = ValueError("del is broken")
                # The following line is included in the traceback report:
                raise exc

class BrokenRepr(BrokenDel):
            def __repr__(self):
                raise AttributeError("repr() is broken")

class BrokenExceptionDel:
            def __del__(self):
                exc = BrokenStrException()
                # The following line is included in the traceback report:
                raise exc

for test_class in (BrokenDel, BrokenRepr, BrokenExceptionDel):
            with self.subTest(test_class):
                obj = test_class()
                with captured_stderr() as stderr:
                    del obj
                report = stderr.getvalue()
                self.assertIn("Exception ignored", report)
                if test_class is BrokenRepr:
                    self.assertIn("<object repr() failed>", report)
                else:
                    self.assertIn(test_class.__del__.__qualname__, report)
                self.assertIn("test_exceptions.py", report)
                self.assertIn("raise exc", report)
                if test_class is BrokenExceptionDel:
                    self.assertIn("BrokenStrException", report)
                    self.assertIn("<exception str() failed>", report)
                else:
                    self.assertIn("ValueError", report)
                    self.assertIn("del is broken", report)
                self.assertTrue(report.endswith("\n"))

def test_unhandled(self):
        # Check for sensible reporting of unhandled exceptions
        for exc_type in (ValueError, BrokenStrException):
            with self.subTest(exc_type):
                try:
                    exc = exc_type("test message")
                    # The following line is included in the traceback report:
                    raise exc
                except exc_type:
                    with captured_stderr() as stderr:
                        sys.__excepthook__(*sys.exc_info())
                report = stderr.getvalue()
                self.assertIn("test_exceptions.py", report)
                self.assertIn("raise exc", report)
                self.assertIn(exc_type.__name__, report)
                if exc_type is BrokenStrException:
                    self.assertIn("<exception str() failed>", report)
                else:
                    self.assertIn("test message", report)
                self.assertTrue(report.endswith("\n"))

class ImportErrorTests(unittest.TestCase):

def test_attributes(self):
        # Setting 'name' and 'path' should not be a problem.
        exc = ImportError('test')
        self.assertIsNone(exc.name)
        self.assertIsNone(exc.path)

exc = ImportError('test', name='somemodule')
        self.assertEqual(exc.name, 'somemodule')
        self.assertIsNone(exc.path)

exc = ImportError('test', path='somepath')
        self.assertEqual(exc.path, 'somepath')
        self.assertIsNone(exc.name)

exc = ImportError('test', path='somepath', name='somename')
        self.assertEqual(exc.name, 'somename')
        self.assertEqual(exc.path, 'somepath')

msg = "'invalid' is an invalid keyword argument for this function"
        with self.assertRaisesRegex(TypeError, msg):
            ImportError('test', invalid='keyword')

with self.assertRaisesRegex(TypeError, msg):
            ImportError('test', name='name', invalid='keyword')

with self.assertRaisesRegex(TypeError, msg):
            ImportError('test', path='path', invalid='keyword')

with self.assertRaisesRegex(TypeError, msg):
            ImportError(invalid='keyword')

msg = "'invalid|another' is an invalid keyword argument for this function"
        with self.assertRaisesRegex(TypeError, msg):
            ImportError('test', invalid='keyword', another=True)

def test_non_str_argument(self):
        # Issue #15778
        with check_warnings(('', BytesWarning), quiet=True):
            arg = b'abc'
            exc = ImportError(arg)
            self.assertEqual(str(arg), str(exc))

def test_copy_pickle(self):
        for kwargs in (dict(),
                       dict(name='somename'),
                       dict(path='somepath'),
                       dict(name='somename', path='somepath')):
            orig = ImportError('test', **kwargs)
            for proto in range(pickle.HIGHEST_PROTOCOL + 1):
                exc = pickle.loads(pickle.dumps(orig, proto))
                self.assertEqual(exc.args, ('test',))
                self.assertEqual(exc.msg, 'test')
                self.assertEqual(exc.name, orig.name)
                self.assertEqual(exc.path, orig.path)
            for c in copy.copy, copy.deepcopy:
                exc = c(orig)
                self.assertEqual(exc.args, ('test',))
                self.assertEqual(exc.msg, 'test')
                self.assertEqual(exc.name, orig.name)
                self.assertEqual(exc.path, orig.path)

if __name__ == '__main__':
    unittest.main()