pydantic_core

version `module-attribute` ¶

__version__: str

SchemaValidator ¶

SchemaValidator is the Python wrapper for pydantic-core's Rust validation logic, internally it owns one CombinedValidator which may in turn own more CombinedValidators which make up the full schema validator.

title `property` ¶

title: str

The title of the schema, as used in the heading of ValidationError.__str__().

validate_python ¶

validate_python(
    input: Any,
    *,
    strict: bool | None = None,
    from_attributes: bool | None = None,
    context: Any | None = None,
    self_instance: Any | None = None
) -> Any

Validate a Python object against the schema and return the validated object.

Parameters:

Name	Type	Description	Default
`input`	`Any`	The Python object to validate.	required
`strict`	`bool \| None`	Whether to validate the object in strict mode. If `None`, the value of `CoreConfig.strict` is used.	`None`
`from_attributes`	`bool \| None`	Whether to validate objects as inputs to models by extracting attributes. If `None`, the value of `CoreConfig.from_attributes` is used.	`None`
`context`	`Any \| None`	The context to use for validation, this is passed to functional validators as `info.context`.	`None`
`self_instance`	`Any \| None`	An instance of a model set attributes on from validation, this is used when running validation from the `__init__` method of a model.	`None`

Raises:

Type	Description
`ValidationError`	If validation fails.
`Exception`	Other error types maybe raised if internal errors occur.

Returns:

Type	Description
`Any`	The validated object.

isinstance_python ¶

isinstance_python(
    input: Any,
    *,
    strict: bool | None = None,
    from_attributes: bool | None = None,
    context: Any | None = None,
    self_instance: Any | None = None
) -> bool

Similar to validate_python() but returns a boolean.

Arguments match validate_python(). This method will not raise ValidationErrors but will raise internal errors.

Returns:

Type	Description
`bool`	`True` if validation succeeds, `False` if validation fails.

validate_json ¶

validate_json(
    input: str | bytes | bytearray,
    *,
    strict: bool | None = None,
    context: Any | None = None,
    self_instance: Any | None = None
) -> Any

Validate JSON data directly against the schema and return the validated Python object.

This method should be significantly faster than validate_python(json.loads(json_data)) as it avoids the need to create intermediate Python objects

It also handles constructing the correct Python type even in strict mode, where validate_python(json.loads(json_data)) would fail validation.

Parameters:

Name	Type	Description	Default
`input`	`str \| bytes \| bytearray`	The JSON data to validate.	required
`strict`	`bool \| None`	Whether to validate the object in strict mode. If `None`, the value of `CoreConfig.strict` is used.	`None`
`context`	`Any \| None`	The context to use for validation, this is passed to functional validators as `info.context`.	`None`
`self_instance`	`Any \| None`	An instance of a model set attributes on from validation.	`None`

Raises:

Type	Description
`ValidationError`	If validation fails or if the JSON data is invalid.
`Exception`	Other error types maybe raised if internal errors occur.

Returns:

Type	Description
`Any`	The validated Python object.

validate_strings ¶

validate_strings(
    input: _StringInput,
    *,
    strict: bool | None = None,
    context: Any | None = None
) -> Any

Validate a string against the schema and return the validated Python object.

This is similar to validate_json but applies to scenarios where the input will be a string but not JSON data, e.g. URL fragments, query parameters, etc.

Parameters:

Name	Type	Description	Default
`input`	`_StringInput`	The input as a string, or bytes/bytearray if `strict=False`.	required
`strict`	`bool \| None`	Whether to validate the object in strict mode. If `None`, the value of `CoreConfig.strict` is used.	`None`
`context`	`Any \| None`	The context to use for validation, this is passed to functional validators as `info.context`.	`None`

Raises:

Type	Description
`ValidationError`	If validation fails or if the JSON data is invalid.
`Exception`	Other error types maybe raised if internal errors occur.

Returns:

Type	Description
`Any`	The validated Python object.

validate_assignment ¶

validate_assignment(
    obj: Any,
    field_name: str,
    field_value: Any,
    *,
    strict: bool | None = None,
    from_attributes: bool | None = None,
    context: Any | None = None
) -> (
    dict[str, Any]
    | tuple[dict[str, Any], dict[str, Any] | None, set[str]]
)

Validate an assignment to a field on a model.

Parameters:

Name	Type	Description	Default
`obj`	`Any`	The model instance being assigned to.	required
`field_name`	`str`	The name of the field to validate assignment for.	required
`field_value`	`Any`	The value to assign to the field.	required
`strict`	`bool \| None`	Whether to validate the object in strict mode. If `None`, the value of `CoreConfig.strict` is used.	`None`
`from_attributes`	`bool \| None`	Whether to validate objects as inputs to models by extracting attributes. If `None`, the value of `CoreConfig.from_attributes` is used.	`None`
`context`	`Any \| None`	The context to use for validation, this is passed to functional validators as `info.context`.	`None`

Raises:

Type	Description
`ValidationError`	If validation fails.
`Exception`	Other error types maybe raised if internal errors occur.

Returns:

Type	Description
`dict[str, Any] \| tuple[dict[str, Any], dict[str, Any] \| None, set[str]]`	Either the model dict or a tuple of `(model_data, model_extra, fields_set)`

get_default_value ¶

get_default_value(
    *, strict: bool | None = None, context: Any = None
) -> Some | None

Get the default value for the schema, including running default value validation.

Parameters:

Name	Type	Description	Default
`strict`	`bool \| None`	Whether to validate the default value in strict mode. If `None`, the value of `CoreConfig.strict` is used.	`None`
`context`	`Any`	The context to use for validation, this is passed to functional validators as `info.context`.	`None`

Raises:

Type	Description
`ValidationError`	If validation fails.
`Exception`	Other error types maybe raised if internal errors occur.

Returns:

Type	Description
`Some \| None`	`None` if the schema has no default value, otherwise a `Some` containing the default.

SchemaSerializer ¶

SchemaSerializer is the Python wrapper for pydantic-core's Rust serialization logic, internally it owns one CombinedSerializer which may in turn own more CombinedSerializers which make up the full schema serializer.

to_python ¶

to_python(
    value: Any,
    *,
    mode: str | None = None,
    include: _IncEx = None,
    exclude: _IncEx = None,
    by_alias: bool = True,
    exclude_unset: bool = False,
    exclude_defaults: bool = False,
    exclude_none: bool = False,
    round_trip: bool = False,
    warnings: (
        bool | Literal["none", "warn", "error"]
    ) = True,
    fallback: Callable[[Any], Any] | None = None,
    serialize_as_any: bool = False,
    context: Any | None = None
) -> Any

Serialize/marshal a Python object to a Python object including transforming and filtering data.

Parameters:

Name	Type	Description	Default
`value`	`Any`	The Python object to serialize.	required
`mode`	`str \| None`	The serialization mode to use, either `'python'` or `'json'`, defaults to `'python'`. In JSON mode, all values are converted to JSON compatible types, e.g. `None`, `int`, `float`, `str`, `list`, `dict`.	`None`
`include`	`_IncEx`	A set of fields to include, if `None` all fields are included.	`None`
`exclude`	`_IncEx`	A set of fields to exclude, if `None` no fields are excluded.	`None`
`by_alias`	`bool`	Whether to use the alias names of fields.	`True`
`exclude_unset`	`bool`	Whether to exclude fields that are not set, e.g. are not included in `__pydantic_fields_set__`.	`False`
`exclude_defaults`	`bool`	Whether to exclude fields that are equal to their default value.	`False`
`exclude_none`	`bool`	Whether to exclude fields that have a value of `None`.	`False`
`round_trip`	`bool`	Whether to enable serialization and validation round-trip support.	`False`
`warnings`	`bool \| Literal['none', 'warn', 'error']`	How to handle invalid fields. False/"none" ignores them, True/"warn" logs errors, "error" raises a `PydanticSerializationError`.	`True`
`fallback`	`Callable[[Any], Any] \| None`	A function to call when an unknown value is encountered, if `None` a `PydanticSerializationError` error is raised.	`None`
`serialize_as_any`	`bool`	Whether to serialize fields with duck-typing serialization behavior.	`False`
`context`	`Any \| None`	The context to use for serialization, this is passed to functional serializers as `info.context`.	`None`

Raises:

Type	Description
`PydanticSerializationError`	If serialization fails and no `fallback` function is provided.

Returns:

Type	Description
`Any`	The serialized Python object.

to_json ¶

to_json(
    value: Any,
    *,
    indent: int | None = None,
    include: _IncEx = None,
    exclude: _IncEx = None,
    by_alias: bool = True,
    exclude_unset: bool = False,
    exclude_defaults: bool = False,
    exclude_none: bool = False,
    round_trip: bool = False,
    warnings: (
        bool | Literal["none", "warn", "error"]
    ) = True,
    fallback: Callable[[Any], Any] | None = None,
    serialize_as_any: bool = False,
    context: Any | None = None
) -> bytes

Serialize a Python object to JSON including transforming and filtering data.

Parameters:

Name	Type	Description	Default
`value`	`Any`	The Python object to serialize.	required
`indent`	`int \| None`	If `None`, the JSON will be compact, otherwise it will be pretty-printed with the indent provided.	`None`
`include`	`_IncEx`	A set of fields to include, if `None` all fields are included.	`None`
`exclude`	`_IncEx`	A set of fields to exclude, if `None` no fields are excluded.	`None`
`by_alias`	`bool`	Whether to use the alias names of fields.	`True`
`exclude_unset`	`bool`	Whether to exclude fields that are not set, e.g. are not included in `__pydantic_fields_set__`.	`False`
`exclude_defaults`	`bool`	Whether to exclude fields that are equal to their default value.	`False`
`exclude_none`	`bool`	Whether to exclude fields that have a value of `None`.	`False`
`round_trip`	`bool`	Whether to enable serialization and validation round-trip support.	`False`
`warnings`	`bool \| Literal['none', 'warn', 'error']`	How to handle invalid fields. False/"none" ignores them, True/"warn" logs errors, "error" raises a `PydanticSerializationError`.	`True`
`fallback`	`Callable[[Any], Any] \| None`	A function to call when an unknown value is encountered, if `None` a `PydanticSerializationError` error is raised.	`None`
`serialize_as_any`	`bool`	Whether to serialize fields with duck-typing serialization behavior.	`False`
`context`	`Any \| None`	The context to use for serialization, this is passed to functional serializers as `info.context`.	`None`

Raises:

Type	Description
`PydanticSerializationError`	If serialization fails and no `fallback` function is provided.

Returns:

Type	Description
`bytes`	JSON bytes.

ValidationError ¶

Bases: ValueError

ValidationError is the exception raised by pydantic-core when validation fails, it contains a list of errors which detail why validation failed.

title `property` ¶

title: str

The title of the error, as used in the heading of str(validation_error).

from_exception_data `staticmethod` ¶

from_exception_data(
    title: str,
    line_errors: list[InitErrorDetails],
    input_type: Literal["python", "json"] = "python",
    hide_input: bool = False,
) -> ValidationError

Python constructor for a Validation Error.

The API for constructing validation errors will probably change in the future, hence the static method rather than __init__.

Parameters:

Name	Type	Description	Default
`title`	`str`	The title of the error, as used in the heading of `str(validation_error)`	required
`line_errors`	`list[InitErrorDetails]`	A list of `InitErrorDetails` which contain information about errors that occurred during validation.	required
`input_type`	`Literal['python', 'json']`	Whether the error is for a Python object or JSON.	`'python'`
`hide_input`	`bool`	Whether to hide the input value in the error message.	`False`

error_count ¶

error_count() -> int

Returns:

Type	Description
`int`	The number of errors in the validation error.

errors ¶

errors(
    *,
    include_url: bool = True,
    include_context: bool = True,
    include_input: bool = True
) -> list[ErrorDetails]

Details about each error in the validation error.

Parameters:

Name	Type	Description	Default
`include_url`	`bool`	Whether to include a URL to documentation on the error each error.	`True`
`include_context`	`bool`	Whether to include the context of each error.	`True`
`include_input`	`bool`	Whether to include the input value of each error.	`True`

Returns:

Type	Description
`list[ErrorDetails]`	A list of `ErrorDetails` for each error in the validation error.

json ¶

json(
    *,
    indent: int | None = None,
    include_url: bool = True,
    include_context: bool = True,
    include_input: bool = True
) -> str

Same as errors() but returns a JSON string.

Parameters:

Name	Type	Description	Default
`indent`	`int \| None`	The number of spaces to indent the JSON by, or `None` for no indentation - compact JSON.	`None`
`include_url`	`bool`	Whether to include a URL to documentation on the error each error.	`True`
`include_context`	`bool`	Whether to include the context of each error.	`True`
`include_input`	`bool`	Whether to include the input value of each error.	`True`

Returns:

Type	Description
`str`	a JSON string.

ErrorDetails ¶

Bases: TypedDict

type `instance-attribute` ¶

type: str

The type of error that occurred, this is an identifier designed for programmatic use that will change rarely or never.

type is unique for each error message, and can hence be used as an identifier to build custom error messages.

loc `instance-attribute` ¶

loc: tuple[int | str, ...]

Tuple of strings and ints identifying where in the schema the error occurred.

msg `instance-attribute` ¶

msg: str

A human readable error message.

input `instance-attribute` ¶

input: Any

The input data at this loc that caused the error.

ctx `instance-attribute` ¶

ctx: NotRequired[dict[str, Any]]

Values which are required to render the error message, and could hence be useful in rendering custom error messages. Also useful for passing custom error data forward.

InitErrorDetails ¶

Bases: TypedDict

type `instance-attribute` ¶

type: str | PydanticCustomError

The type of error that occurred, this should a "slug" identifier that changes rarely or never.

loc `instance-attribute` ¶

loc: NotRequired[tuple[int | str, ...]]

Tuple of strings and ints identifying where in the schema the error occurred.

input `instance-attribute` ¶

input: Any

The input data at this loc that caused the error.

ctx `instance-attribute` ¶

ctx: NotRequired[dict[str, Any]]

Values which are required to render the error message, and could hence be useful in rendering custom error messages. Also useful for passing custom error data forward.

SchemaError ¶

Bases: Exception

Information about errors that occur while building a SchemaValidator or SchemaSerializer.

error_count ¶

error_count() -> int

Returns:

Type	Description
`int`	The number of errors in the schema.

errors ¶

errors() -> list[ErrorDetails]

Returns:

Type	Description
`list[ErrorDetails]`	A list of `ErrorDetails` for each error in the schema.

PydanticCustomError ¶

Bases: ValueError

PydanticKnownError ¶

Bases: ValueError

PydanticOmit ¶

Bases: Exception

PydanticSerializationError ¶

Bases: ValueError

PydanticSerializationUnexpectedValue ¶

Bases: ValueError

Url ¶

Bases: SupportsAllComparisons

A URL type, internal logic uses the url rust crate originally developed by Mozilla.

scheme `property` ¶

scheme: str

The scheme part of the URL.

e.g. https in https://user:pass@host:port/path?query#fragment

username `property` ¶

username: str | None

The username part of the URL, or None.

e.g. user in https://user:pass@host:port/path?query#fragment

password `property` ¶

password: str | None

The password part of the URL, or None.

e.g. pass in https://user:pass@host:port/path?query#fragment

host `property` ¶

host: str | None

The host part of the URL, or None.

If the URL must be punycode encoded, this is the encoded host, e.g if the input URL is https://£££.com, host will be xn--9aaa.com

port `property` ¶

port: int | None

The port part of the URL, or None.

e.g. port in https://user:pass@host:port/path?query#fragment

path `property` ¶

path: str | None

The path part of the URL, or None.

e.g. /path in https://user:pass@host:port/path?query#fragment

query `property` ¶

query: str | None

The query part of the URL, or None.

e.g. query in https://user:pass@host:port/path?query#fragment

fragment `property` ¶

fragment: str | None

The fragment part of the URL, or None.

e.g. fragment in https://user:pass@host:port/path?query#fragment

unicode_host ¶

unicode_host() -> str | None

The host part of the URL as a unicode string, or None.

e.g. host in https://user:pass@host:port/path?query#fragment

If the URL must be punycode encoded, this is the decoded host, e.g if the input URL is https://£££.com, unicode_host() will be £££.com

query_params ¶

query_params() -> list[tuple[str, str]]

The query part of the URL as a list of key-value pairs.

e.g. [('foo', 'bar')] in https://user:pass@host:port/path?foo=bar#fragment

unicode_string ¶

unicode_string() -> str

The URL as a unicode string, unlike __str__() this will not punycode encode the host.

If the URL must be punycode encoded, this is the decoded string, e.g if the input URL is https://£££.com, unicode_string() will be https://£££.com

build `classmethod` ¶

build(
    *,
    scheme: str,
    username: str | None = None,
    password: str | None = None,
    host: str,
    port: int | None = None,
    path: str | None = None,
    query: str | None = None,
    fragment: str | None = None
) -> Self

Build a new Url instance from its component parts.

Parameters:

Name	Type	Description	Default
`scheme`	`str`	The scheme part of the URL.	required
`username`	`str \| None`	The username part of the URL, or omit for no username.	`None`
`password`	`str \| None`	The password part of the URL, or omit for no password.	`None`
`host`	`str`	The host part of the URL.	required
`port`	`int \| None`	The port part of the URL, or omit for no port.	`None`
`path`	`str \| None`	The path part of the URL, or omit for no path.	`None`
`query`	`str \| None`	The query part of the URL, or omit for no query.	`None`
`fragment`	`str \| None`	The fragment part of the URL, or omit for no fragment.	`None`

Returns:

Type	Description
`Self`	An instance of URL

MultiHostUrl ¶

Bases: SupportsAllComparisons

A URL type with support for multiple hosts, as used by some databases for DSNs, e.g. https://foo.com,bar.com/path.

Internal URL logic uses the url rust crate originally developed by Mozilla.

scheme `property` ¶

scheme: str

The scheme part of the URL.

e.g. https in https://foo.com,bar.com/path?query#fragment

path `property` ¶

path: str | None

The path part of the URL, or None.

e.g. /path in https://foo.com,bar.com/path?query#fragment

query `property` ¶

query: str | None

The query part of the URL, or None.

e.g. query in https://foo.com,bar.com/path?query#fragment

fragment `property` ¶

fragment: str | None

The fragment part of the URL, or None.

e.g. fragment in https://foo.com,bar.com/path?query#fragment

query_params ¶

query_params() -> list[tuple[str, str]]

The query part of the URL as a list of key-value pairs.

e.g. [('foo', 'bar')] in https://foo.com,bar.com/path?query#fragment

hosts ¶

hosts() -> list[MultiHostHost]

The hosts of the MultiHostUrl as MultiHostHost typed dicts.

from pydantic_core import MultiHostUrl

mhu = MultiHostUrl('https://foo.com:123,foo:[email protected]/path')
print(mhu.hosts())
"""
[
    {'username': None, 'password': None, 'host': 'foo.com', 'port': 123},
    {'username': 'foo', 'password': 'bar', 'host': 'bar.com', 'port': 443}
]

Returns: A list of dicts, each representing a host.

unicode_string ¶

unicode_string() -> str

The URL as a unicode string, unlike __str__() this will not punycode encode the hosts.

build `classmethod` ¶

build(
    *,
    scheme: str,
    hosts: list[MultiHostHost] | None = None,
    username: str | None = None,
    password: str | None = None,
    host: str | None = None,
    port: int | None = None,
    path: str | None = None,
    query: str | None = None,
    fragment: str | None = None
) -> Self

Build a new MultiHostUrl instance from its component parts.

This method takes either hosts - a list of MultiHostHost typed dicts, or the individual components username, password, host and port.

Parameters:

Name	Type	Description	Default
`scheme`	`str`	The scheme part of the URL.	required
`hosts`	`list[MultiHostHost] \| None`	Multiple hosts to build the URL from.	`None`
`username`	`str \| None`	The username part of the URL.	`None`
`password`	`str \| None`	The password part of the URL.	`None`
`host`	`str \| None`	The host part of the URL.	`None`
`port`	`int \| None`	The port part of the URL.	`None`
`path`	`str \| None`	The path part of the URL.	`None`
`query`	`str \| None`	The query part of the URL, or omit for no query.	`None`
`fragment`	`str \| None`	The fragment part of the URL, or omit for no fragment.	`None`

Returns:

Type	Description
`Self`	An instance of `MultiHostUrl`

MultiHostHost ¶

Bases: TypedDict

A host part of a multi-host URL.

username `instance-attribute` ¶

username: str | None

The username part of this host, or None.

password `instance-attribute` ¶

password: str | None

The password part of this host, or None.

host `instance-attribute` ¶

host: str | None

The host part of this host, or None.

port `instance-attribute` ¶

port: int | None

The port part of this host, or None.

ArgsKwargs ¶

Some ¶

Bases: Generic[_T]

Similar to Rust's Option::Some type, this identifies a value as being present, and provides a way to access it.

Generally used in a union with None to different between "some value which could be None" and no value.

value `property` ¶

value: _T

Returns the value wrapped by Some.

TzInfo ¶

Bases: tzinfo

ErrorTypeInfo ¶

Bases: TypedDict

Gives information about errors.

type `instance-attribute` ¶

type: ErrorType

The type of error that occurred, this should a "slug" identifier that changes rarely or never.

message_template_python `instance-attribute` ¶

message_template_python: str

String template to render a human readable error message from using context, when the input is Python.

example_message_python `instance-attribute` ¶

example_message_python: str

Example of a human readable error message, when the input is Python.

message_template_json `instance-attribute` ¶

message_template_json: NotRequired[str]

String template to render a human readable error message from using context, when the input is JSON data.

example_message_json `instance-attribute` ¶

example_message_json: NotRequired[str]

Example of a human readable error message, when the input is JSON data.

example_context `instance-attribute` ¶

example_context: dict[str, Any] | None

Example of context values.

to_json ¶

to_json(
    value: Any,
    *,
    indent: int | None = None,
    include: _IncEx = None,
    exclude: _IncEx = None,
    by_alias: bool = True,
    exclude_none: bool = False,
    round_trip: bool = False,
    timedelta_mode: Literal["iso8601", "float"] = "iso8601",
    bytes_mode: Literal["utf8", "base64"] = "utf8",
    inf_nan_mode: Literal[
        "null", "constants", "strings"
    ] = "constants",
    serialize_unknown: bool = False,
    fallback: Callable[[Any], Any] | None = None,
    serialize_as_any: bool = False,
    context: Any | None = None
) -> bytes

Serialize a Python object to JSON including transforming and filtering data.

This is effectively a standalone version of SchemaSerializer.to_json.

Parameters:

Name	Type	Description	Default
`value`	`Any`	The Python object to serialize.	required
`indent`	`int \| None`	If `None`, the JSON will be compact, otherwise it will be pretty-printed with the indent provided.	`None`
`include`	`_IncEx`	A set of fields to include, if `None` all fields are included.	`None`
`exclude`	`_IncEx`	A set of fields to exclude, if `None` no fields are excluded.	`None`
`by_alias`	`bool`	Whether to use the alias names of fields.	`True`
`exclude_none`	`bool`	Whether to exclude fields that have a value of `None`.	`False`
`round_trip`	`bool`	Whether to enable serialization and validation round-trip support.	`False`
`timedelta_mode`	`Literal['iso8601', 'float']`	How to serialize `timedelta` objects, either `'iso8601'` or `'float'`.	`'iso8601'`
`bytes_mode`	`Literal['utf8', 'base64']`	How to serialize `bytes` objects, either `'utf8'` or `'base64'`.	`'utf8'`
`inf_nan_mode`	`Literal['null', 'constants', 'strings']`	How to serialize `Infinity`, `-Infinity` and `NaN` values, either `'null'`, `'constants'`, or `'strings'`.	`'constants'`
`serialize_unknown`	`bool`	Attempt to serialize unknown types, `str(value)` will be used, if that fails `"<Unserializable {value_type} object>"` will be used.	`False`
`fallback`	`Callable[[Any], Any] \| None`	A function to call when an unknown value is encountered, if `None` a `PydanticSerializationError` error is raised.	`None`
`serialize_as_any`	`bool`	Whether to serialize fields with duck-typing serialization behavior.	`False`
`context`	`Any \| None`	The context to use for serialization, this is passed to functional serializers as `info.context`.	`None`

Raises:

Type	Description
`PydanticSerializationError`	If serialization fails and no `fallback` function is provided.

Returns:

Type	Description
`bytes`	JSON bytes.

from_json ¶

from_json(
    data: str | bytes | bytearray,
    *,
    allow_inf_nan: bool = True,
    cache_strings: (
        bool | Literal["all", "keys", "none"]
    ) = True,
    allow_partial: bool = False
) -> Any

Deserialize JSON data to a Python object.

This is effectively a faster version of json.loads(), with some extra functionality.

Parameters:

Name	Type	Description	Default
`data`	`str \| bytes \| bytearray`	The JSON data to deserialize.	required
`allow_inf_nan`	`bool`	Whether to allow `Infinity`, `-Infinity` and `NaN` values as `json.loads()` does by default.	`True`
`cache_strings`	`bool \| Literal['all', 'keys', 'none']`	Whether to cache strings to avoid constructing new Python objects, this should have a significant impact on performance while increasing memory usage slightly, `all/True` means cache all strings, `keys` means cache only dict keys, `none/False` means no caching.	`True`
`allow_partial`	`bool`	Whether to allow partial deserialization, if `True` JSON data is returned if the end of the input is reached before the full object is deserialized, e.g. `["aa", "bb", "c` would return `['aa', 'bb']`.	`False`

Raises:

Type	Description
`ValueError`	If deserialization fails.

Returns:

Type	Description
`Any`	The deserialized Python object.

to_jsonable_python ¶

to_jsonable_python(
    value: Any,
    *,
    include: _IncEx = None,
    exclude: _IncEx = None,
    by_alias: bool = True,
    exclude_none: bool = False,
    round_trip: bool = False,
    timedelta_mode: Literal["iso8601", "float"] = "iso8601",
    bytes_mode: Literal["utf8", "base64"] = "utf8",
    inf_nan_mode: Literal[
        "null", "constants", "strings"
    ] = "constants",
    serialize_unknown: bool = False,
    fallback: Callable[[Any], Any] | None = None,
    serialize_as_any: bool = False,
    context: Any | None = None
) -> Any

Serialize/marshal a Python object to a JSON-serializable Python object including transforming and filtering data.

This is effectively a standalone version of SchemaSerializer.to_python(mode='json').

Parameters:

Name	Type	Description	Default
`value`	`Any`	The Python object to serialize.	required
`include`	`_IncEx`	A set of fields to include, if `None` all fields are included.	`None`
`exclude`	`_IncEx`	A set of fields to exclude, if `None` no fields are excluded.	`None`
`by_alias`	`bool`	Whether to use the alias names of fields.	`True`
`exclude_none`	`bool`	Whether to exclude fields that have a value of `None`.	`False`
`round_trip`	`bool`	Whether to enable serialization and validation round-trip support.	`False`
`timedelta_mode`	`Literal['iso8601', 'float']`	How to serialize `timedelta` objects, either `'iso8601'` or `'float'`.	`'iso8601'`
`bytes_mode`	`Literal['utf8', 'base64']`	How to serialize `bytes` objects, either `'utf8'` or `'base64'`.	`'utf8'`
`inf_nan_mode`	`Literal['null', 'constants', 'strings']`	How to serialize `Infinity`, `-Infinity` and `NaN` values, either `'null'`, `'constants'`, or `'strings'`.	`'constants'`
`serialize_unknown`	`bool`	Attempt to serialize unknown types, `str(value)` will be used, if that fails `"<Unserializable {value_type} object>"` will be used.	`False`
`fallback`	`Callable[[Any], Any] \| None`	A function to call when an unknown value is encountered, if `None` a `PydanticSerializationError` error is raised.	`None`
`serialize_as_any`	`bool`	Whether to serialize fields with duck-typing serialization behavior.	`False`
`context`	`Any \| None`	The context to use for serialization, this is passed to functional serializers as `info.context`.	`None`

Raises:

Type	Description
`PydanticSerializationError`	If serialization fails and no `fallback` function is provided.

Returns:

Type	Description
`Any`	The serialized Python object.

pydantic_core

__version__ module-attribute ¶

SchemaValidator ¶

title property ¶

validate_python ¶

isinstance_python ¶

validate_json ¶

validate_strings ¶

validate_assignment ¶

get_default_value ¶

SchemaSerializer ¶

to_python ¶

to_json ¶

ValidationError ¶

title property ¶

from_exception_data staticmethod ¶

error_count ¶

errors ¶

json ¶

ErrorDetails ¶

type instance-attribute ¶

loc instance-attribute ¶

msg instance-attribute ¶

input instance-attribute ¶

ctx instance-attribute ¶

InitErrorDetails ¶

type instance-attribute ¶

loc instance-attribute ¶

input instance-attribute ¶

ctx instance-attribute ¶

SchemaError ¶

error_count ¶

errors ¶

PydanticCustomError ¶

PydanticKnownError ¶

PydanticOmit ¶

PydanticSerializationError ¶

PydanticSerializationUnexpectedValue ¶

Url ¶

scheme property ¶

username property ¶

password property ¶

host property ¶

port property ¶

path property ¶

query property ¶

fragment property ¶

unicode_host ¶

query_params ¶

unicode_string ¶

build classmethod ¶

MultiHostUrl ¶

scheme property ¶

path property ¶

query property ¶

fragment property ¶

query_params ¶

hosts ¶

unicode_string ¶

build classmethod ¶

MultiHostHost ¶

username instance-attribute ¶

password instance-attribute ¶

host instance-attribute ¶

port instance-attribute ¶

ArgsKwargs ¶

Some ¶

value property ¶

TzInfo ¶

ErrorTypeInfo ¶

type instance-attribute ¶

message_template_python instance-attribute ¶

example_message_python instance-attribute ¶

message_template_json instance-attribute ¶

example_message_json instance-attribute ¶

example_context instance-attribute ¶

to_json ¶

from_json ¶

to_jsonable_python ¶

version `module-attribute` ¶

title `property` ¶

title `property` ¶

from_exception_data `staticmethod` ¶

type `instance-attribute` ¶

loc `instance-attribute` ¶

msg `instance-attribute` ¶

input `instance-attribute` ¶

ctx `instance-attribute` ¶

type `instance-attribute` ¶

loc `instance-attribute` ¶

input `instance-attribute` ¶

ctx `instance-attribute` ¶

scheme `property` ¶

username `property` ¶

password `property` ¶

host `property` ¶

port `property` ¶

path `property` ¶

query `property` ¶

fragment `property` ¶

build `classmethod` ¶

scheme `property` ¶

path `property` ¶

query `property` ¶

fragment `property` ¶

build `classmethod` ¶

username `instance-attribute` ¶

password `instance-attribute` ¶

host `instance-attribute` ¶

port `instance-attribute` ¶

value `property` ¶

type `instance-attribute` ¶

message_template_python `instance-attribute` ¶

example_message_python `instance-attribute` ¶

message_template_json `instance-attribute` ¶

example_message_json `instance-attribute` ¶

example_context `instance-attribute` ¶