IFT_FRELAYDCE                     = 0x2c
	IFT_FRF16MFRBUNDLE                = 0xa3
	IFT_FRFORWARD                     = 0x9e
	IFT_G703AT2MB                     = 0x43
	IFT_G703AT64K                     = 0x42
	IFT_GIF                           = 0xf0
	IFT_GIGABITETHERNET               = 0x75
	IFT_GR303IDT                      = 0xb2
	IFT_GR303RDT                      = 0xb1
	IFT_H323GATEKEEPER                = 0xa4

	0x18, 0xf6, 0xc6, 0x1f, 0xb1, 0xc7, 0x21, 0x6d, 0x47, 0x50, 0x2d, 0x96, 0xea, 0xb5, 0x56, 0x80,
	0xc2, 0xd7, 0x2c, 0xa9, 0x2a, 0x88, 0x72, 0x40, 0xb0, 0x21, 0x42, 0x11, 0x29, 0x48, 0x93, 0x84,
	0x03, 0x42, 0xa2, 0x93, 0xf5, 0xdb, 0xcd, 0x34, 0xdd, 0x0f, 0x76, 0x66, 0x4d, 0x7d, 0xeb, 0x4f,
	0xe0, 0xc8, 0x91, 0xff, 0xc0, 0x9f, 0x08, 0x07, 0xa4, 0x1e, 0x7b, 0x40, 0x16, 0x71, 0xff, 0x45,

	},
	{
		// LZ4
		header: []byte{0x4, 0x22, 0x4d, 0x18},
		f:      formatLZ4,
	},
	{
		// Snappy/S2 stream
		header: []byte{0xff, 0x06, 0x00, 0x00},
		f:      formatS2,
	},
	{
		header: []byte{0x42, 0x5a, 'h'},
		f:      formatBZ2,
	},
}

type untarOptions struct {
	ignoreDirs bool
	ignoreErrs bool
	prefixAll  string
}

// disconnectReader will ensure that no reads can take place on

	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x55, 0x3d, 0x6f, 0xd3, 0x4c,
	0x1c, 0xcf, 0xa5, 0xad, 0x94, 0x5e, 0xd2, 0xaa, 0x8f, 0x9f, 0x0a, 0x45, 0x19, 0x9c, 0xca, 0x42,
	0x28, 0x42, 0xea, 0x99, 0x56, 0xa8, 0xaa, 0x18, 0x8a, 0x64, 0x5e, 0x04, 0xa2, 0xb4, 0x70, 0x2d,
	0x0b, 0x62, 0xe0, 0x6a, 0x1f, 0x8e, 0x89, 0xed, 0xb3, 0xec, 0x73, 0x44, 0x36, 0xc4, 0x82, 0xc4,

	0x40, 0xc5, 0x01, 0x69, 0x62, 0x4f, 0xed, 0xc1, 0xf6, 0xcc, 0xb2, 0x33, 0xeb, 0xe0, 0x1b, 0x27,
	0xce, 0x7c, 0x03, 0x8e, 0x7c, 0x06, 0xbe, 0x41, 0x8e, 0x3d, 0xf6, 0x64, 0x11, 0xf3, 0x2d, 0x72,
	0x42, 0x33, 0x3b, 0xfb, 0xa7, 0x89, 0x2d, 0x42, 0xc3, 0x29, 0xfb, 0xfe, 0xfc, 0x7e, 0xef, 0xe5,
	0xf7, 0xf6, 0xbd, 0x35, 0xf8, 0x70, 0xbc, 0x2b, 0x3c, 0xca, 0x7d, 0x1c, 0x52, 0x1f, 0x0f, 0xa6,

	F_GETFD                                 = 0x1
	F_GETFL                                 = 0x3
	F_GETLK                                 = 0x7
	F_GETLKPID                              = 0x42
	F_GETNOSIGPIPE                          = 0x4a
	F_GETOWN                                = 0x5
	F_GETPATH                               = 0x32
	F_GETPATH_MTMINFO                       = 0x47

```Python hl_lines="36-42"
{!../../../docs_src/nosql_databases/tutorial001.py!}
```

### f-strings

	0x2e, 0x41, 0x63, 0x6b, 0x48, 0x00, 0x52, 0x03, 0x61, 0x63, 0x6b, 0x42, 0x09, 0x0a, 0x07, 0x70,
	0x61, 0x79, 0x6c, 0x6f, 0x61, 0x64, 0x2a, 0x1f, 0x0a, 0x07, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f,
	0x6e, 0x12, 0x0c, 0x0a, 0x08, 0x4e, 0x4f, 0x54, 0x5f, 0x55, 0x53, 0x45, 0x44, 0x10, 0x00, 0x12,
	0x06, 0x0a, 0x02, 0x56, 0x31, 0x10, 0x01, 0x42, 0x0c, 0x5a, 0x0a, 0x70, 0x6b, 0x67, 0x2f, 0x7a,

	if err != nil {
		return
	}
	err = z.Flags.Retry.EncodeMsg(en)
	if err != nil {
		err = msgp.WrapError(err, "Flags", "Retry")
		return
	}
	// write "Bucket"
	err = en.Append(0xa6, 0x42, 0x75, 0x63, 0x6b, 0x65, 0x74)
	if err != nil {
		return
	}
	err = en.WriteString(z.Bucket)
	if err != nil {
		err = msgp.WrapError(err, "Bucket")
		return
	}
	// write "Prefix"

	IPV6_RTHDR_TYPE_0             = 0x0
	IPV6_SEC_OPT                  = 0x22
	IPV6_SRC_PREFERENCES          = 0x23
	IPV6_TCLASS                   = 0x26
	IPV6_UNICAST_HOPS             = 0x5
	IPV6_UNSPEC_SRC               = 0x42
	IPV6_USE_MIN_MTU              = 0x20
	IPV6_V6ONLY                   = 0x27
	IP_ADD_MEMBERSHIP             = 0x13
	IP_ADD_SOURCE_MEMBERSHIP      = 0x17
	IP_BLOCK_SOURCE               = 0x15