error messages, debug information, and object files. In practice,
parsing these is significantly less work and more robust than parsing
C source.

Cgo first invokes gcc -E -dM on the preamble, in order to find out
about simple #defines for constants and the like. These are recorded
for later use.

Next, cgo needs to identify the kinds for each identifier. For the
identifiers C.foo, cgo generates this C program:

	<preamble>

            off += a.length;
        }
        return res;
    }

    @Test
    @DisplayName("Read single bytes from stream with message packet")
    void readSingleByteHappyPath() throws IOException {
        // Create a simple message with 3 bytes of data
        byte[] data = new byte[] { 1, 2, 3 };
        byte[] fullData = concat(messageHeader(3), data);

    * This SNI extension allows one single server (with a **single IP address**) to have **several HTTPS certificates** and serve **multiple HTTPS domains/applications**.
    * For this to work, a **single** component (program) running on the server, listening on the **public IP address**, must have **all the HTTPS certificates** in the server.

// the content of an object has changed.
//
// In general, an S3 ETag is an MD5 checksum of the object
// content. However, there are many exceptions to this rule.
//
// # Single-part Upload
//
// In case of a basic single-part PUT operation - without server
// side encryption or object compression - the ETag of an object
// is its content MD5.
//
// # Multi-part Upload
//

        }
    }

    @Test
    @DisplayName("Should write proper wire format structure")
    void testWireFormatStructure() throws Exception {
        // Given
        String simplePath = "\\\\S\\s"; // Simple path for easier verification
        Smb2TreeConnectRequest req = new Smb2TreeConnectRequest(mockConfig, simplePath);
        byte[] buffer = new byte[256];

        // When
        req.encode(buffer, 0);

        } else {
          quotient = divide(x, radix);
        }
        long rem = x - quotient * radix;
        buf[--i] = Character.forDigit((int) rem, radix);
        x = quotient;
        // Simple modulo/division approach
        while (x > 0) {
          buf[--i] = Character.forDigit((int) (x % radix), radix);
          x /= radix;
        }
      }
      // Generate string

	b.n += n
	nn += n
	return nn, nil
}

// WriteByte writes a single byte.
func (b *Writer) WriteByte(c byte) error {
	if b.err != nil {
		return b.err
	}
	if b.Available() <= 0 && b.Flush() != nil {
		return b.err
	}
	b.buf[b.n] = c
	b.n++
	return nil
}

// WriteRune writes a single Unicode code point, returning
// the number of bytes written and any error.

### Documentación alternativa de la API { #alternative-api-docs }

Y ahora, ve a [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc).

Verás la documentación alternativa automática (proporcionada por [ReDoc](https://github.com/Rebilly/ReDoc)):

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

		return nil, err
	}
	if debugPrint {
		fmt.Println("Connecting Mux", m.MuxID, ",to", m.parent.Remote)
	}

	// Space for one message and an error.
	responseCh := make(chan Response, 1)

	// Spawn simple disconnect
	if requests == nil {
		go m.handleOneWayStream(responseCh, responses)
		return &Stream{responses: responseCh, Requests: nil, ctx: m.ctx, cancel: m.cancelFn, muxID: m.MuxID}, nil
	}

現在你知道要修正它，把 `age` 用 `str(age)` 轉成字串：

{* ../../docs_src/python_types/tutorial004_py310.py hl[2] *}

## 宣告型別 { #declaring-types }

你剛剛看到宣告型別提示的主要位置：函式參數。

這也是你在 **FastAPI** 中最常使用它們的地方。

### 簡單型別 { #simple-types }

你可以宣告所有標準的 Python 型別，不只 `str`。

例如你可以用：

* `int`
* `float`
* `bool`
* `bytes`

{* ../../docs_src/python_types/tutorial005_py310.py hl[1] *}