////

//// tab | Python 3.8+

```Python hl_lines="14"
{!> ../../docs_src/body_nested_models/tutorial002.py!}
```

////

## Set 类型

但是随后我们考虑了一下，意识到标签不应该重复，它们很大可能会是唯一的字符串。

Python 具有一种特殊的数据类型来保存一组唯一的元素，即 `set`。

然后我们可以导入 `Set` 并将 `tag` 声明为一个由 `str` 组成的 `set`：

//// tab | Python 3.10+

```Python hl_lines="12"
{!> ../../docs_src/body_nested_models/tutorial003_py310.py!}
```

////

      GregorianCalendar(UTC).apply {
        isLenient = false
        set(Calendar.YEAR, year)
        set(Calendar.MONTH, month - 1)
        set(Calendar.DAY_OF_MONTH, dayOfMonth)
        set(Calendar.HOUR_OF_DAY, hour)
        set(Calendar.MINUTE, minute)
        set(Calendar.SECOND, second)
        set(Calendar.MILLISECOND, 0)
        return timeInMillis
      }
    }

    /**

  class EntrySet extends Entries implements Set<Entry<K, V>> {
    @Override
    public int hashCode() {
      return Sets.hashCodeImpl(this);
    }

    @Override
    public boolean equals(@CheckForNull Object obj) {
      return Sets.equalsImpl(this, obj);
    }
  }

  abstract Iterator<Entry<K, V>> entryIterator();

  @LazyInit @CheckForNull private transient Set<K> keySet;

  @Override

        Objects.requireNonNull(project, "project cannot be null");

        Set<String> projectIds = new HashSet<>();

        getDownstreamProjects(ProjectSorter.getId(project), projectIds, transitive);

        return getSortedProjects(projectIds);
    }

    private void getDownstreamProjects(String projectId, Set<String> projectIds, boolean transitive) {
        for (String id : sorter.getDependents(projectId)) {

# Usage: setup.python.sh <pyversion> <requirements.txt>

# Sets up custom apt sources for our TF images.

# Prevent apt install tzinfo from asking our location (assumes UTC)
export DEBIAN_FRONTEND=noninteractive

# Set up shared custom sources
apt-get update
apt-get install -y gnupg ca-certificates

# Deadsnakes: https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa

							stmt.AddError(field.Set(stmt.Context, rv, field.DefaultValueInterface))
						} else if field.AutoCreateTime > 0 || field.AutoUpdateTime > 0 {
							stmt.AddError(field.Set(stmt.Context, rv, curTime))
							values.Values[i][idx], _ = field.ValueOf(stmt.Context, rv)
						}
					} else if field.AutoUpdateTime > 0 && updateTrackTime {
						stmt.AddError(field.Set(stmt.Context, rv, curTime))

	switch reflectValue.Kind() {
	case reflect.Struct:
		switch rel.Type {
		case schema.HasMany, schema.Many2Many:
			tx.AddError(rel.Field.Set(tx.Statement.Context, reflectValue, reflect.MakeSlice(rel.Field.IndirectFieldType, 0, 10).Interface()))
		default:
			tx.AddError(rel.Field.Set(tx.Statement.Context, reflectValue, reflect.New(rel.Field.FieldType).Interface()))
		}
	case reflect.Slice, reflect.Array:

    ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
  }

  TF_Operation* Use(const std::vector<TF_Operation*>& inputs) {
    return UseT(ToOutput(inputs));
  }

  TF_Operation* UseT(const std::vector<TF_Output>& inputs) {
    TF_Operation* op;
    UseHelper(inputs, &op);
    return op;
  }

                        log.debug("sessionSetup: " + this.credentials);
                    }

                    /*
                     * We explicitly set uid to 0 here to prevent a new
                     * SMB_COM_SESSION_SETUP_ANDX from having it's uid set to an
                     * old value when the session is re-established. Otherwise a
                     * "The parameter is incorrect" error can occur.

	}

	testCases := []struct {
		serverAddrs   []string
		expectedAddrs set.StringSet
	}{
		{[]string{"localhost:" + casePorts[0]}, set.CreateStringSet("127.0.0.1:" + casePorts[0])},
		{[]string{nonLoopBackIP + ":" + casePorts[1]}, set.CreateStringSet(nonLoopBackIP + ":" + casePorts[1])},
		{[]string{"127.0.0.1:" + casePorts[2], nonLoopBackIP + ":" + casePorts[2]}, set.CreateStringSet("127.0.0.1:"+casePorts[2], nonLoopBackIP+":"+casePorts[2])},