具有任意键名的映射 (MapPattern)

当你不想让用户在映射中定义键名，而只指定键的类型时，使用 MapPattern。

当你希望指定确切的键名时，使用 'Map' 验证器。

from strictyaml import MapPattern, Int, Float, Str, Any, Seq, YAMLValidationError, load
from ensure import Ensure

schema = MapPattern(Str(), Int())

等价性 1

â: 1
b: 2

Ensure(load(yaml_snippet, schema)).equals({u"â": 1, "b": 2})

等价性 2

a: 1
c: 3

Ensure(load(yaml_snippet, schema)).equals({"a": 1, "c": 3})

等价性 3

a: 1

Ensure(load(yaml_snippet, schema)).equals({"a": 1, })

使用浮点数和整数

10.25: 23
20.33: 76

Ensure(load(yaml_snippet, MapPattern(Float(), Int())).data).equals({10.25: 23, 20.33: 76})

使用 Int 和 List

1:
- ABC
2:
- DEF

Ensure(load(yaml_snippet, MapPattern(Int(), Seq(Str()))).data).equals({1: ["ABC"], 2: ["DEF"]})

无效 1

b: b

load(yaml_snippet, schema)

strictyaml.exceptions.YAMLValidationError:
when expecting an integer
found arbitrary text
  in "<unicode string>", line 1, column 1:
    b: b
     ^ (line: 1)

无效 2

a: a
b: 2

load(yaml_snippet, schema)

strictyaml.exceptions.YAMLValidationError:
when expecting an integer
found arbitrary text
  in "<unicode string>", line 1, column 1:
    a: a
     ^ (line: 1)

超过最大键数

â: 1
b: 2

load(yaml_snippet, MapPattern(Str(), Int(), maximum_keys=1))

strictyaml.exceptions.YAMLValidationError:
while parsing a mapping
  in "<unicode string>", line 1, column 1:
    "\xE2": '1'
     ^ (line: 1)
expected a maximum of 1 key, found 2.
  in "<unicode string>", line 2, column 1:
    b: '2'
    ^ (line: 2)

少于最小键数

â: 1

load(yaml_snippet, MapPattern(Str(), Int(), minimum_keys=2))

strictyaml.exceptions.YAMLValidationError:
while parsing a mapping
expected a minimum of 2 keys, found 1.
  in "<unicode string>", line 1, column 1:
    "\xE2": '1'
     ^ (line: 1)

使用非 ASCII 字符无效

a: 1
b: yâs
c: 3

load(yaml_snippet, schema)

strictyaml.exceptions.YAMLValidationError:
when expecting an integer
found arbitrary text
  in "<unicode string>", line 2, column 1:
    b: "y\xE2s"
    ^ (line: 2)

可执行规范

从 mappattern.story storytests 自动生成的文档。