Python yaml 模块，dump() 实例源码

def hugepage_support(user, group='hugetlb', nr_hugepages=256,
                     max_map_count=65536, mnt_point='/run/hugepages/kvm',
                     pagesize='2MB', mount=True, set_shmmax=False):
    """Enable hugepages on system.

    Args:
    user (str)  -- Username to allow access to hugepages to
    group (str) -- Group name to own hugepages
    nr_hugepages (int) -- Number of pages to reserve
    max_map_count (int) -- Number of Virtual Memory Areas a process can own
    mnt_point (str) -- Directory to mount hugepages on
    pagesize (str) -- Size of hugepages
    mount (bool) -- Whether to Mount hugepages
    """
    group_info = add_group(group)
    gid = group_info.gr_gid
    add_user_to_group(user, group)
    if max_map_count < 2 * nr_hugepages:
        max_map_count = 2 * nr_hugepages
    sysctl_settings = {
        'vm.nr_hugepages': nr_hugepages,
        'vm.max_map_count': max_map_count,
        'vm.hugetlb_shm_group': gid,
    }
    if set_shmmax:
        shmmax_current = int(check_output(['sysctl', '-n', 'kernel.shmmax']))
        shmmax_minsize = bytes_from_string(pagesize) * nr_hugepages
        if shmmax_minsize > shmmax_current:
            sysctl_settings['kernel.shmmax'] = shmmax_minsize
    sysctl.create(yaml.dump(sysctl_settings), '/etc/sysctl.d/10-hugepage.conf')
    mkdir(mnt_point, owner='root', group='root', perms=0o755, force=False)
    lfstab = fstab.Fstab()
    fstab_entry = lfstab.get_entry_by_attr('mountpoint', mnt_point)
    if fstab_entry:
        lfstab.remove_entry(fstab_entry)
    entry = lfstab.Entry('nodev', mnt_point, 'hugetlbfs',
                         'mode=1770,gid={},pagesize={}'.format(gid, pagesize), 0, 0)
    lfstab.add_entry(entry)
    if mount:
        fstab_mount(mnt_point)

def retrieve(cont, filename):
    stream = file(filename, 'r')
    data = yaml.load(stream)
    #return yaml.dump(data, encoding=('utf-8'), default_flow_style=False, allow_unicode=True)
    return data[cont].encode('utf-8')

def internal_data(filename, io, entry, cont, cont_in = None, cont_in2 = None): #Supports up to 3 containers stacked on top.
    "filename = 'string',, io = [in, out],, entry = val,, cont,,..."
    stream = open(filename, 'r')
    prof = yaml.load(stream)
    if io == 'out':
        if cont_in == None:
            val = prof[cont]
        else:
            if cont_in2 == None:
                val = prof[cont][cont_in]
            else:
                val = prof[cont][cont_in][cont_in2]
        return val

    if io == 'in':
        if cont_in == None:
            prof[cont] = entry
        else:
            if cont_in2 == None:
                prof[cont][cont_in] = entry
            else:
                prof[cont][cont_in][cont_in2] = entry
        with open(filename, 'w') as yaml_file:
            yaml_file.write(yaml.dump(prof, default_flow_style = False))

def begin(self):
    variables = tf.contrib.framework.get_variables(scope=self.params["prefix"])

    def varname_in_checkpoint(name):
      """Removes the prefix from the variable name.
      """
      prefix_parts = self.params["prefix"].split("/")
      checkpoint_prefix = "/".join(prefix_parts[:-1])
      return name.replace(checkpoint_prefix + "/", "")

    target_names = [varname_in_checkpoint(_.op.name) for _ in variables]
    restore_map = {k: v for k, v in zip(target_names, variables)}

    tf.logging.info("Restoring variables: \n%s",
                    yaml.dump({k: v.op.name
                               for k, v in restore_map.items()}))

    self._saver = tf.train.Saver(restore_map)

def test_invalid_form_data_unknown_url_name(self):
        data = {
            'url': '/test/',
            'alias': 'test-page',
            'description': 'At vero eos et accusamus et iusto odio',
            'keywords': 'lorem ipsum dolor sit amet',
            'page_processor': 'powerpages.RedirectProcessor',
            'page_processor_config': yaml.dump({
                'to name': 'not-existing-url'
            }),
            'template': '<h1>{{ website_page.title }}</h1>\n',
            'title': 'De Finibus Bonorum et Malorum'
        }
        form = PageAdminForm(data, instance=Page())
        self.assertFalse(form.is_valid())
        self.assertEqual(list(form.errors.keys()), ['__all__'])

def test_invalid_form_data_unknown_parent_template(self):
        # No parent page
        data = {
            'url': '/test/',
            'alias': 'test-page',
            'description': 'At vero eos et accusamus et iusto odio',
            'keywords': 'lorem ipsum dolor sit amet',
            'page_processor': 'powerpages.DefaultPageProcessor',
            'page_processor_config': yaml.dump({
                'base template': "this-template-does-not-exist.html"
            }),
            'template': '<h1>{{ website_page.title }}</h1>\n',
            'title': 'De Finibus Bonorum et Malorum'
        }
        form = PageAdminForm(data, instance=Page())
        self.assertFalse(form.is_valid())
        self.assertEqual(list(form.errors.keys()), ['__all__'])

def edit_mkdocs_config(self):
        """
        Create mkdocs.yml file from metadata
        :return: Boolean indicating the success of the operation.
        """
        mkdocs_yml = os.path.join(MKDOCS_DIR, "mkdocs.yml")

        cfg = dict(
            site_name=self._wiki_name,
            theme='readthedocs',
            docs_dir=self._wiki_name,
            site_dir=self._out_dir
        )

        with open(mkdocs_yml, 'w') as outfile:
            yaml.dump(cfg, outfile, default_flow_style=False)

def set_device_yaml():
    """
    ???????Android version?????yaml?
    :return:
    """
    device_lst = []
    for device in get_device():
        adb = lib.adbUtils.ADB(device)
        U.Logging.success(
            'get device:{},Android version:{}'.format(
                device, adb.get_android_version()))
        device_lst.append({'platformVersion': adb.get_android_version(
        ), 'deviceName': device, 'platformName': 'Android'})

    ini = U.ConfigIni()
    with open(ini.get_ini('test_device', 'device'), 'w') as f:
        yaml.dump(device_lst, f)
        f.close()

def __load_analysis(self):
        """
        ????
        ????:
            1:????log
            2:????
            3:??????
            4:??????
            5:??
        :return: ????
        """
        U.Logging.success('read the yaml file')
        self.__save_android_log()
        error_msg = self.__analysis_yaml(self.path_yaml)
        with open(self.__save_error_status(), 'w') as f:
            yaml.dump({'error_msg': error_msg}, f)
            U.Logging.debug(str('results of the:%s' % error_msg))
            f.close()

        return self.__save_screen_file()

def convert(self, common):
        """
        Process all hardware profiles
        """
        for pathname in common.keys():
            for filename in common[pathname]:
                if 'profile-' in filename:
                    with open(filename, "r") as yml:
                        content = yaml.safe_load(yml)
                    migrated = _migrate(content, filename)
                    newfilename = re.sub('profile-', 'migrated-profile-', filename)
                    path_dir = os.path.dirname(newfilename)
                    _create_dirs(path_dir, self.pillar_dir)
                    with open(newfilename, "w") as yml:
                        yml.write(yaml.dump(migrated,
                                  Dumper=self.friendly_dumper,
                                  default_flow_style=False))

def _record_filter(args, base_dir):
    """
    Save the filter provided
    """
    filter_file = '{}/.filter'.format(base_dir)

    if not isfile(filter_file):
        # do a touch filter_file
        open(filter_file, 'a').close()

    current_filter = {}
    with open(filter_file) as filehandle:
        current_filter = yaml.load(filehandle)
    if current_filter is None:
        current_filter = {}

    pprint.pprint(current_filter)

    # filter a bunch of salt content and the target key before writing
    rec_args = {k: v for k, v in args.items() if k is not 'target' and not
                k.startswith('__')}
    current_filter[args['target']] = rec_args

    with open(filter_file, 'w') as filehandle:
        yaml.dump(current_filter, filehandle, default_flow_style=False)

def _update_grains(self, content, filename="/etc/salt/grains"):
        """
        Update the yaml file without destroying other content
        """
        log.info("Updating {}".format(filename))

        # Keep yaml human readable/editable
        friendly_dumper = yaml.SafeDumper
        friendly_dumper.ignore_aliases = lambda self, data: True

        with open(filename, 'w') as minion_grains:
            minion_grains.write(yaml.dump(content,
                                          Dumper=friendly_dumper,
                                          default_flow_style=False))
        log.info("Syncing grains")
        __salt__['saltutil.sync_grains']()

def roles():
    """
    Remove the roles from the cluster/*.sls files
    """
    # Keep yaml human readable/editable
    friendly_dumper = yaml.SafeDumper
    friendly_dumper.ignore_aliases = lambda self, data: True

    cluster_dir = '/srv/pillar/ceph/cluster'
    for filename in os.listdir(cluster_dir):
        pathname = "{}/{}".format(cluster_dir, filename)
        content = None
        with open(pathname, "r") as sls_file:
            content = yaml.safe_load(sls_file)
        log.info("content {}".format(content))
        if 'roles' in content:
            content.pop('roles')
        with open(pathname, "w") as sls_file:
            sls_file.write(yaml.dump(content, Dumper=friendly_dumper,
                           default_flow_style=False))

def default():
    """
    Remove the .../stack/defaults directory.  Preserve available_roles
    """
    # Keep yaml human readable/editable
    friendly_dumper = yaml.SafeDumper
    friendly_dumper.ignore_aliases = lambda self, data: True

    preserve = {}
    content = None
    pathname = "/srv/pillar/ceph/stack/default/{}/cluster.yml".format('ceph')
    with open(pathname, "r") as sls_file:
        content = yaml.safe_load(sls_file)
    preserve['available_roles'] = content['available_roles']
    stack_default = "/srv/pillar/ceph/stack/default"
    shutil.rmtree(stack_default)
    os.makedirs("{}/{}".format(stack_default, 'ceph'))
    with open(pathname, "w") as sls_file:
        sls_file.write(yaml.dump(preserve, Dumper=friendly_dumper,
                       default_flow_style=False))

    uid = pwd.getpwnam("salt").pw_uid
    gid = grp.getgrnam("salt").gr_gid
    for path in [stack_default, "{}/{}".format(stack_default, 'ceph'), pathname]:
        os.chown(path, uid, gid)

def init(banner, hidden, backup):
    """Initialize a manage shell in current directory
        $ manage init --banner="My awesome app shell"
        initializing manage...
        creating manage.yml
    """
    manage_file = HIDDEN_MANAGE_FILE if hidden else MANAGE_FILE
    if os.path.exists(manage_file):
        if not click.confirm('Rewrite {0}?'.format(manage_file)):
            return

        if backup:
            bck = '.bck_{0}'.format(manage_file)
            with open(manage_file, 'r') as source, open(bck, 'w') as bck_file:
                bck_file.write(source.read())

    with open(manage_file, 'w') as output:
        data = default_manage_dict
        if banner:
            data['shell']['banner']['message'] = banner
        output.write(yaml.dump(data, default_flow_style=False))

def save_parameters(stack, params):
    """saves parameters to disk"""
    # decode parameter dict
    params_dict = {}
    for param in params:
        params_dict[param['ParameterKey']] = param['ParameterValue']

    stack_dir = path.join('stacks', stack)
    param_path = path.join(stack_dir, 'parameters.yaml')

    # ensure paths are present
    if not path.exists('stacks'):
        mkdir('stacks')
    if not path.exists(stack_dir):
        mkdir(stack_dir)

    with open(param_path, mode='w', encoding='utf-8') as file:
        file.write(yaml.dump(params_dict, default_flow_style=False, explicit_start=True))

def return_config_overrides_yaml(self,
                                     config_overrides,
                                     resultant,
                                     list_extend=True,
                                     ignore_none_type=True):
        """Return config yaml.

        :param config_overrides: ``dict``
        :param resultant: ``str`` || ``unicode``
        :returns: ``str``
        """
        original_resultant = yaml.safe_load(resultant)
        merged_resultant = self._merge_dict(
            base_items=original_resultant,
            new_items=config_overrides,
            list_extend=list_extend
        )
        return yaml.dump(
            merged_resultant,
            Dumper=IDumper,
            default_flow_style=False,
            width=1000,
        )

def test_add_and_remove_config(self):
        self.init_with_remote_catalog()
        with self.captured_output() as (out, err):
            StateHolder.skip_docker = True
            poco = Poco(home_dir=self.tmpdir, argv=["catalog", "config", "add", "teszt", "ssh://teszt.teszt/teszt"])
            poco.run()
        self.assertEqual(0, len(err.getvalue()))
        data = dict()
        data["teszt"] = dict()
        data["teszt"]["repositoryType"] = "git"
        data["teszt"]["server"] = "ssh://teszt.teszt/teszt"

        self.assertIn(yaml.dump(data, default_flow_style=False, default_style='', indent=4).strip(),
                      out.getvalue().strip())
        self.clean_states()
        with self.captured_output() as (out, err):
            StateHolder.skip_docker = True
            poco = Poco(home_dir=self.tmpdir, argv=["catalog", "config", "remove", "teszt"])
            poco.run()
        self.assertEqual(0, len(err.getvalue()))
        self.assertNotIn("teszt", out.getvalue().strip())

def generate_test_accounts_file(tenant_id):
    """
    Add needed tenant and user params into test_accounts.yaml
    """

    logger.debug("Add needed params into test_accounts.yaml...")
    accounts_list = [
        {
            'tenant_name':
                CONST.__getattribute__('tempest_identity_tenant_name'),
            'tenant_id': str(tenant_id),
            'username': CONST.__getattribute__('tempest_identity_user_name'),
            'password':
                CONST.__getattribute__('tempest_identity_user_password')
        }
    ]

    with open(TEST_ACCOUNTS_FILE, "w") as f:
        yaml.dump(accounts_list, f, default_flow_style=False)

def post(self):
        if self.current_user['level'] != 0:
            self.custom_error()
        settings = {
            'init_money': int(self.get_body_argument('init_money')),
            'reg_type': self.get_body_argument('reg_type'),
            'cookie_secret': self.get_body_argument('cookie_secret') or self.settings['cookie_secret'],
            'site': {
                'name': self.get_body_argument('sitename'),
                'keyword': self.get_body_argument('keyword'),
                'description': self.get_body_argument('description')
            }
        }
        self.settings.update(settings)
        custom_settings = {}
        with open(self.settings['config_file'], 'r') as f:
            custom_settings = yaml.load(f)
            custom_settings['global'].update(settings)
        with open(self.settings['config_file'], 'w') as f:
            yaml.dump(custom_settings, f,
                      default_flow_style=False, default_style='"')
        self.redirect('/ushio/setting')

def test_install_hook_git(self):
        self.git_install_requested.return_value = True
        self.determine_packages.return_value = ['foo', 'bar']
        self.determine_ports.return_value = [80, 81, 82]
        repo = 'cloud:trusty-juno'
        openstack_origin_git = {
            'repositories': [
                {'name': 'requirements',
                 'repository': 'git://git.openstack.org/openstack/requirements',  # noqa
                 'branch': 'stable/juno'},
                {'name': 'nova',
                 'repository': 'git://git.openstack.org/openstack/nova',
                 'branch': 'stable/juno'}
            ],
            'directory': '/mnt/openstack-git',
        }
        projects_yaml = yaml.dump(openstack_origin_git)
        self.test_config.set('openstack-origin', repo)
        self.test_config.set('openstack-origin-git', projects_yaml)
        hooks.install()
        self.git_install.assert_called_with(projects_yaml)
        self.apt_install.assert_called_with(['foo', 'bar'], fatal=True)
        self.assertTrue(self.execd_preinstall.called)
        self.assertTrue(self.disable_services.called)
        self.cmd_all_services.assert_called_with('stop')

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('key', help='key name to be fetched ("." to fetch all)')
    parser.add_argument('conf', help='path to a config file')

    ns = parser.parse_args()

    try:
        val = fetch_value_from_file(ns.key, ns.conf)
    except KeyError:
        log('no such key: ' + ns.key)
        sys.exit(1)

    if isinstance(val, dict) or isinstance(val, list):
        print yaml.dump(val)
    else:
        print val

def to_yaml(self):
        """
        Pretty print dump as YAML.

        """
        return dump(
            self.to_safe_dict(),
            # show every document in its own block
            default_flow_style=False,
            # start a new document (via "---") before every resource
            explicit_start=True,
            # follow (modern) PEP8 max line length and indent
            width=99,
            indent=4,
            Dumper=SafeDumper,
        )

def test_basic_config():


    fd, path = tempfile.mkstemp()
    f = os.fdopen(fd,'w')
    f.write(yaml.dump(testcfg))
    f.flush()

    cfg = ny.get_config(path)
    ny.write_supervisor_conf()

    config = ConfigParser.ConfigParser()
    config.readfp(open(cfg['supervisor.conf']))

    # from IPython import embed
    # embed()
    print(config.get('program:testtunnel','command'))
    assert 'sshuttle -r 1.1.1.1 2.2.2.2 -x 3.3.3.3' in config.get('program:testtunnel','command')

def fake_metta(matrix_dict, metadata):
    """Stores matrix and metadata in a metta-data-like form

    Args:
    matrix_dict (dict) of form { columns: values }.
        Expects an entity_id to be present which it will use as the index
    metadata (dict). Any metadata that should be set

    Yields:
        tuple of filenames for matrix and metadata
    """
    matrix = pandas.DataFrame.from_dict(matrix_dict).set_index('entity_id')
    with tempfile.NamedTemporaryFile() as matrix_file:
        with tempfile.NamedTemporaryFile('w') as metadata_file:
            hdf = pandas.HDFStore(matrix_file.name)
            hdf.put('title', matrix, data_columns=True)
            matrix_file.seek(0)

            yaml.dump(metadata, metadata_file)
            metadata_file.seek(0)
            yield (matrix_file.name, metadata_file.name)

def fake_metta(matrix_dict, metadata):
    """Stores matrix and metadata in a metta-data-like form

    Args:
    matrix_dict (dict) of form { columns: values }.
        Expects an entity_id to be present which it will use as the index
    metadata (dict). Any metadata that should be set

    Yields:
        tuple of filenames for matrix and metadata
    """
    matrix = pd.DataFrame.from_dict(matrix_dict).set_index('entity_id')
    with tempfile.NamedTemporaryFile() as matrix_file:
        with tempfile.NamedTemporaryFile('w') as metadata_file:
            hdf = pd.HDFStore(matrix_file.name)
            hdf.put('title', matrix, data_columns=True)
            matrix_file.seek(0)

            yaml.dump(metadata, metadata_file)
            metadata_file.seek(0)
            yield (matrix_file.name, metadata_file.name)

def publish_updating(self):

        LOG.info("Sending updating request")
        nsd = open('test/test_descriptors/nsdu.yml', 'r')
        message = {'NSD': yaml.load(nsd), 'UUID':'937213ae-890b-413c-a11e-45c62c4eee3f'}
        self.manoconn.call_async(self._on_publish_ins_response,
                                 'specific.manager.registry.ssm.update',
                                 yaml.dump(message))


        vnfd1 = open('test/test_descriptors/vnfdu.yml', 'r')
        message = {'VNFD': yaml.load(vnfd1), 'UUID':'754fe4fe-96c9-484d-9683-1a1e8b9a31a3'}
        self.manoconn.call_async(self._on_publish_ins_response,
                                 'specific.manager.registry.fsm.update',
                                 yaml.dump(message))
        nsd.close()
        vnfd1.close()

def publish_terminating(self):

        nsd = open('test/test_descriptors/nsdt.yml', 'r')
        message = {'NSD': yaml.load(nsd), 'UUID': '937213ae-890b-413c-a11e-45c62c4eee3f'}
        self.manoconn.call_async(self._on_publish_ins_response,
                                 'specific.manager.registry.ssm.terminate',
                                 yaml.dump(message))

        vnfd1 = open('test/test_descriptors/vnfdt1.yml', 'r')
        message = {'VNFD': yaml.load(vnfd1), 'UUID': 'c32b731f-7eea-4afd-9c60-0b0d0ea37eed'}
        self.manoconn.call_async(self._on_publish_ins_response,
                                 'specific.manager.registry.fsm.terminate',
                                 yaml.dump(message))

        vnfd2 = open('test/test_descriptors/vnfdt2.yml', 'r')
        message = {'VNFD': yaml.load(vnfd2), 'UUID': '754fe4fe-96c9-484d-9683-1a1e8b9a31a3'}
        self.manoconn.call_async(self._on_publish_ins_response,
                                 'specific.manager.registry.fsm.terminate',
                                 yaml.dump(message))

        nsd.close()
        vnfd1.close()
        vnfd2.close()

def publish_nsd(self):

        LOG.info("Sending onboard request")
        nsd = open('test/test_descriptors/nsd.yml', 'r')
        message = {'NSD': yaml.load(nsd)}
        self.manoconn.call_async(self._on_publish_nsd_response,
                                 'specific.manager.registry.ssm.on-board',
                                 yaml.dump(message))

        vnfd1 = open('test/test_descriptors/vnfd1.yml', 'r')
        message = {'VNFD': yaml.load(vnfd1)}
        self.manoconn.call_async(self._on_publish_nsd_response,
                                 'specific.manager.registry.fsm.on-board',
                                 yaml.dump(message))

        vnfd2 = open('test/test_descriptors/vnfd2.yml', 'r')
        message = {'VNFD': yaml.load(vnfd2)}
        self.manoconn.call_async(self._on_publish_nsd_response,
                                 'specific.manager.registry.fsm.on-board',
                                 yaml.dump(message))

        nsd.close()
        vnfd1.close()
        vnfd2.close()

def publish_sid(self):

        LOG.info("Sending instantiate request")
        nsd = open('test/test_descriptors/nsd.yml', 'r')
        message = {'NSD': yaml.load(nsd), 'UUID': '937213ae-890b-413c-a11e-45c62c4eee3f'}
        self.manoconn.call_async(self._on_publish_sid_response,
                                 'specific.manager.registry.ssm.instantiate',
                                 yaml.dump(message))

        vnfd1 = open('test/test_descriptors/vnfd1.yml', 'r')
        message = {'VNFD': yaml.load(vnfd1), 'UUID': 'c32b731f-7eea-4afd-9c60-0b0d0ea37eed'}
        self.manoconn.call_async(self._on_publish_sid_response,
                                 'specific.manager.registry.fsm.instantiate',
                                 yaml.dump(message))

        vnfd2 = open('test/test_descriptors/vnfd2.yml', 'r')
        message = {'VNFD': yaml.load(vnfd2), 'UUID': '754fe4fe-96c9-484d-9683-1a1e8b9a31a3'}
        self.manoconn.call_async(self._on_publish_sid_response,
                                 'specific.manager.registry.fsm.instantiate',
                                 yaml.dump(message))
        nsd.close()
        vnfd1.close()
        vnfd2.close()

def yaml(self):
        """Serialize the object to yaml"""
        return yaml.dump(self.data)

def save(self):
        """Save this config to disk.

        If the charm is using the :mod:`Services Framework <services.base>`
        or :meth:'@hook <Hooks.hook>' decorator, this
        is called automatically at the end of successful hook execution.
        Otherwise, it should be called directly by user code.

        To disable automatic saves, set ``implicit_save=False`` on this
        instance.

        """
        with open(self.path, 'w') as f:
            json.dump(self, f)

def store_context(self, file_name, config_data):
        if not os.path.isabs(file_name):
            file_name = os.path.join(hookenv.charm_dir(), file_name)
        with open(file_name, 'w') as file_stream:
            os.fchmod(file_stream.fileno(), 0o600)
            yaml.dump(config_data, file_stream)

def rewrite_yml(data):
    with io.open('toc.yml', 'w', encoding='utf8') as outfile:
        yaml.dump(data, outfile, default_flow_style=False, allow_unicode=True)

def save_yaml_config(filepath, config):
    with open(filepath, 'w') as f:
        yaml.dump(config, f, default_flow_style=False)

def save(self, cfg_file=None):
        """
        Save's configuration back to disk.

        """
        if cfg_file is None:
            cfg_file = self.cfg_file

        else:
            # acquire new configuration path
            cfg_file = abspath(expanduser(cfg_file))

        try:
            with open(cfg_file, 'w') as fp:
                yaml.dump(self.cfg_data, fp, default_flow_style=False)

        except IOError, e:
            logger.debug('%s' % (str(e)))
            logger.error('Failed to write configuration file %s' % (
                cfg_file,
            ))
            return False

        # Update central configuration
        self.cfg_file = cfg_file

        if hasattr(self, '__mask_re'):
            # Presumably something has changed if the user called save so we
            # destroy our cached mask to be safe
            del self.__mask_re

        return True

def insert(data, filename):
    with open(filename, 'w') as yaml_file:
        yaml.dump(data, yaml_file)

def enter_data(cont, valinput, filename): #Cont for container#profile.yml
    stream = open(filename, 'r')
    prof = yaml.load(stream) # Player information is stored here.
    prof[cont] = valinput
    with open(filename, 'w') as yaml_file:
        yaml_file.write(yaml.dump(prof, default_flow_style = False))

def get_data(cont, filename):
    stream = open(filename, 'r')
    profile = yaml.load(stream) # Player information is stored here.
    data = yaml.dump(profile, default_flow_style = False, encoding=('utf-8'))
    return profile[cont]

def save_yaml_config(filepath, config):
    with open(filepath, 'w') as f:
        yaml.dump(config, f, default_flow_style=False)

def saveUserPreferences(self) :
        '''
        write user preferences into the related configuration file
        '''
        with open(self._userPrfesPathName, 'w') as outfile:
            yaml.dump(self._userPrefs, outfile, default_flow_style=False)

def write(data):
        with open(path, 'w') as file:
            yaml.dump(data, file, default_flow_style=True)

def load_source(in_f, out_f):
    reader = csv.reader(in_f)
    entries = [make_entry(row) for row in reader]
    yaml.dump(entries, out_f, allow_unicode=True, default_flow_style=False)

def __save_config(self):
        """Saves the configuration.

            Saves the config attribute to the configuration
            file.
        """
        with open(self.USERS_CONF_PATH, "w+") as config_file:
            config_file.write(yaml.dump(self.__config))

def hugepage_support(user, group='hugetlb', nr_hugepages=256,
                     max_map_count=65536, mnt_point='/run/hugepages/kvm',
                     pagesize='2MB', mount=True, set_shmmax=False):
    """Enable hugepages on system.

    Args:
    user (str)  -- Username to allow access to hugepages to
    group (str) -- Group name to own hugepages
    nr_hugepages (int) -- Number of pages to reserve
    max_map_count (int) -- Number of Virtual Memory Areas a process can own
    mnt_point (str) -- Directory to mount hugepages on
    pagesize (str) -- Size of hugepages
    mount (bool) -- Whether to Mount hugepages
    """
    group_info = add_group(group)
    gid = group_info.gr_gid
    add_user_to_group(user, group)
    if max_map_count < 2 * nr_hugepages:
        max_map_count = 2 * nr_hugepages
    sysctl_settings = {
        'vm.nr_hugepages': nr_hugepages,
        'vm.max_map_count': max_map_count,
        'vm.hugetlb_shm_group': gid,
    }
    if set_shmmax:
        shmmax_current = int(check_output(['sysctl', '-n', 'kernel.shmmax']))
        shmmax_minsize = bytes_from_string(pagesize) * nr_hugepages
        if shmmax_minsize > shmmax_current:
            sysctl_settings['kernel.shmmax'] = shmmax_minsize
    sysctl.create(yaml.dump(sysctl_settings), '/etc/sysctl.d/10-hugepage.conf')
    mkdir(mnt_point, owner='root', group='root', perms=0o755, force=False)
    lfstab = fstab.Fstab()
    fstab_entry = lfstab.get_entry_by_attr('mountpoint', mnt_point)
    if fstab_entry:
        lfstab.remove_entry(fstab_entry)
    entry = lfstab.Entry('nodev', mnt_point, 'hugetlbfs',
                         'mode=1770,gid={},pagesize={}'.format(gid, pagesize), 0, 0)
    lfstab.add_entry(entry)
    if mount:
        fstab_mount(mnt_point)

def yaml(self):
        """Serialize the object to yaml"""
        return yaml.dump(self.data)

def save(self):
        """Save this config to disk.

        If the charm is using the :mod:`Services Framework <services.base>`
        or :meth:'@hook <Hooks.hook>' decorator, this
        is called automatically at the end of successful hook execution.
        Otherwise, it should be called directly by user code.

        To disable automatic saves, set ``implicit_save=False`` on this
        instance.

        """
        with open(self.path, 'w') as f:
            json.dump(self, f)

def store_context(self, file_name, config_data):
        if not os.path.isabs(file_name):
            file_name = os.path.join(hookenv.charm_dir(), file_name)
        with open(file_name, 'w') as file_stream:
            os.fchmod(file_stream.fileno(), 0o600)
            yaml.dump(config_data, file_stream)