users.Add(user)
	}
	return users
}

// Extract path string by stripping off the `prefix` value and the suffix,
// value, usually in the following form.
//
//	s := "config/iam/users/foo/config.json"
//	prefix := "config/iam/users/"
//	suffix := "config.json"
//	result is foo
func extractPathPrefixAndSuffix(s string, prefix string, suffix string) string {

		err := fmt.Errorf("Incorrect argument type passed to %s", sqlFnSubstring)
		return nil, errIncorrectSQLFunctionArgumentType(err)
	}

	// Assemble other arguments
	arg2, arg3 := e.From, e.For
	// Check if the second form of substring is being used
	if e.From == nil {
		arg2, arg3 = e.Arg2, e.Arg3
	}

	// Evaluate the FROM argument
	v2, err := arg2.evalNode(r, tableAlias)
	if err != nil {
		return nil, err
	}

Mas `OAuth2PasswordRequestForm` é apenas uma dependência de classe que você mesmo poderia ter escrito ou poderia ter declarado os parâmetros do `Form` (formulário) diretamente.

Mas como é um caso de uso comum, ele é fornecido diretamente pelo **FastAPI**, apenas para facilitar.

///

### Use os dados do formulário

/// tip | Dica

    @Override
    public int hashCode() {
      return equivalence.hash(reference);
    }

    /**
     * Returns a string representation for this equivalence wrapper. The form of this string
     * representation is not specified.
     */
    @Override
    public String toString() {
      return equivalence + ".wrap(" + reference + ")";
    }

Esto incluye a librerías externas basadas en Pydantic como <abbr title="Object-Relational Mapper">ORM</abbr>s y <abbr title="Object-Document Mapper">ODM</abbr>s para bases de datos.

### 步骤 5：返回内容

```Python hl_lines="8"
{!../../docs_src/first_steps/tutorial001.py!}
```

你可以返回一个 `dict`、`list`，像 `str`、`int` 一样的单个值，等等。

你还可以返回 Pydantic 模型（稍后你将了解更多）。

还有许多其他将会自动转换为 JSON 的对象和模型（包括 ORM 对象等）。尝试下使用你最喜欢的一种，它很有可能已经被支持。

## 总结

* 导入 `FastAPI`。
* 创建一个 `app` 实例。
* 编写一个**路径操作装饰器**（如 `@app.get("/")`）。
* 编写一个**路径操作函数**（如上面的 `def root(): ...`）。

 * form}), the memory requirement is 8*N bytes for the copy of the dataset plus an overhead which is
 * independent of N (but depends on the quantiles being computed). When calling {@link
 * ScaleAndIndex#computeInPlace computeInPlace} (in {@linkplain ScaleAndIndexes#computeInPlace
 * either form}), only the overhead is required. The number of object allocations is independent of

## Major themes

Kubernetes is developed by community members whose work is organized into
[Special Interest Groups](https://github.com/kubernetes/community/blob/master/sig-list.md), which provide the themes that guide their work. For the 1.9 release, these themes included:

### API Machinery

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *

			t.Errorf("Expected legal hold status %s, got %s", tt.expectedStatus, actualStatus)
		}
	}
}

// TestUnmarshalDefaultRetention checks if default retention
// marshaling and unmarshalling work as expected
func TestUnmarshalDefaultRetention(t *testing.T) {
	days := uint64(4)
	years := uint64(1)
	zerodays := uint64(0)
	invalidDays := uint64(maximumRetentionDays + 1)
	tests := []struct {