python类filters()的实例源码

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def test_filteredWarning(self):
        """
        L{deprecate.warnAboutFunction} emits a warning that will be filtered if
        L{warnings.filterwarning} is called with the module name of the
        deprecated function.
        """
        # Clean up anything *else* that might spuriously filter out the warning,
        # such as the "always" simplefilter set up by unittest._collectWarnings.
        # We'll also rely on trial to restore the original filters afterwards.
        del warnings.filters[:]

        warnings.filterwarnings(
            action="ignore", module="twisted_private_helper")

        from twisted_private_helper import module
        module.callTestFunction()

        warningsShown = self.flushWarnings()
        self.assertEqual(len(warningsShown), 0)

def runWithWarningsSuppressed(suppressedWarnings, f, *a, **kw):
    """Run the function C{f}, but with some warnings suppressed.

    @param suppressedWarnings: A list of arguments to pass to filterwarnings.
                               Must be a sequence of 2-tuples (args, kwargs).
    @param f: A callable, followed by its arguments and keyword arguments
    """
    for args, kwargs in suppressedWarnings:
        warnings.filterwarnings(*args, **kwargs)
    addedFilters = warnings.filters[:len(suppressedWarnings)]
    try:
        result = f(*a, **kw)
    except:
        exc_info = sys.exc_info()
        _resetWarningFilters(None, addedFilters)
        reraise(exc_info[1], exc_info[2])
    else:
        if isinstance(result, defer.Deferred):
            result.addBoth(_resetWarningFilters, addedFilters)
        else:
            _resetWarningFilters(None, addedFilters)
        return result

def test_flushedWarningsConfiguredAsErrors(self):
        """
        If a warnings filter has been installed which turns warnings into
        exceptions, tests which emit those warnings but flush them do not have
        an error added to the reporter.
        """
        class CustomWarning(Warning):
            pass

        result = TestResult()
        case = Mask.MockTests('test_flushed')
        case.category = CustomWarning

        originalWarnings = warnings.filters[:]
        try:
            warnings.simplefilter('error')
            case.run(result)
            self.assertEqual(result.errors, [])
        finally:
            warnings.filters[:] = originalWarnings

def __enter__(self):
        if self._entered:
            raise RuntimeError("Cannot enter %r twice" % self)
        self._entered = True
        self._filters = self._module.filters
        self._module.filters = self._filters[:]
        self._showwarning = self._module.showwarning
        if self._record:
            log = []

            def showwarning(*args, **kwargs):
                log.append(WarningMessage(*args, **kwargs))
            self._module.showwarning = showwarning
            return log
        else:
            return None

def filter(self, category=Warning, message="", module=None):
        """
        Add a new suppressing filter or apply it if the state is entered.

        Parameters
        ----------
        category : class, optional
            Warning class to filter
        message : string, optional
            Regular expression matching the warning message.
        module : module, optional
            Module to filter for. Note that the module (and its file)
            must match exactly and cannot be a submodule. This may make
            it unreliable for external modules.

        Notes
        -----
        When added within a context, filters are only added inside
        the context and will be forgotten when the context is exited.
        """
        self._filter(category=category, message=message, module=module,
                     record=False)

def runsource(self, source):
        "Extend base class method: Stuff the source in the line cache first"
        filename = self.stuffsource(source)
        self.more = 0
        self.save_warnings_filters = warnings.filters[:]
        warnings.filterwarnings(action="error", category=SyntaxWarning)
        # at the moment, InteractiveInterpreter expects str
        assert isinstance(source, str)
        #if isinstance(source, str):
        #    from idlelib import IOBinding
        #    try:
        #        source = source.encode(IOBinding.encoding)
        #    except UnicodeError:
        #        self.tkconsole.resetoutput()
        #        self.write("Unsupported characters in input\n")
        #        return
        try:
            # InteractiveInterpreter.runsource() calls its runcode() method,
            # which is overridden (see below)
            return InteractiveInterpreter.runsource(self, source, filename)
        finally:
            if self.save_warnings_filters is not None:
                warnings.filters[:] = self.save_warnings_filters
                self.save_warnings_filters = None

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def catch_warnings():
    """Catch warnings in a with block in a list"""
    # make sure deprecation warnings are active in tests
    warnings.simplefilter('default', category=DeprecationWarning)

    filters = warnings.filters
    warnings.filters = filters[:]
    old_showwarning = warnings.showwarning
    log = []
    def showwarning(message, category, filename, lineno, file=None, line=None):
        log.append(locals())
    try:
        warnings.showwarning = showwarning
        yield log
    finally:
        warnings.filters = filters
        warnings.showwarning = old_showwarning

def test_deprecated(self):
        import warnings

        warnings.resetwarnings()  # in case we've instantiated one before

        # set up warning filters to allow all, set up restore when this test is done
        filters_backup, warnings.filters = warnings.filters, []
        self.addCleanup(setattr, warnings, 'filters', filters_backup)

        with warnings.catch_warnings(record=True) as caught_warnings:
            WhiteListRoundRobinPolicy([])
            self.assertEqual(len(caught_warnings), 1)
            warning_message = caught_warnings[-1]
            self.assertEqual(warning_message.category, DeprecationWarning)
            self.assertIn('4.0', warning_message.message.args[0])

def test_version_10_format_legacy_parser(self):
        """
        """
        path_variable = None
        for env in os.environ:
            if env.lower() == 'path':
                path_variable = env

        if path_variable:
            old_path = os.environ[path_variable]
            os.environ[path_variable] = ''
        #catch_warnings not available until py26
        warning_filters = warnings.filters
        warnings.filters = warning_filters[:]
        try:
            warnings.simplefilter("ignore", DeprecationWarning)
            self._write_entries(ENTRIES_V10)
            rev = egg_info.egg_info.get_svn_revision()
        finally:
            #restore the warning filters
            warnings.filters = warning_filters
            #restore the os path
            if path_variable:
                os.environ[path_variable] = old_path

        self.assertEqual(rev, '89000')