gql.client

class gql.client.AsyncClientSession(client: gql.client.Client)

Bases: object

An instance of this class is created when using async with on a client.

It contains the async methods (execute, subscribe) to send queries on an async transport using the same session.

__init__(client: gql.client.Client)
Parameters

client – the client used

async execute(document: graphql.language.ast.DocumentNode, *args, variable_values: Optional[Dict[str, Any]] = None, operation_name: Optional[str] = None, serialize_variables: Optional[bool] = None, parse_result: Optional[bool] = None, get_execution_result: Literal[False] = False, **kwargs) → Dict[str, Any]
async execute(document: graphql.language.ast.DocumentNode, *args, variable_values: Optional[Dict[str, Any]] = None, operation_name: Optional[str] = None, serialize_variables: Optional[bool] = None, parse_result: Optional[bool] = None, get_execution_result: Literal[True], **kwargs) → graphql.execution.execute.ExecutionResult

Coroutine to execute the provided document AST asynchronously using the async transport.

Raises a TransportQueryError if an error has been returned in

the ExecutionResult.

Parameters

  • document – GraphQL query as AST Node object.

  • variable_values – Dictionary of input parameters.

  • operation_name – Name of the operation that shall be executed.

  • serialize_variables – whether the variable values should be serialized. Used for custom scalars and/or enums. By default use the serialize_variables argument of the client.

  • parse_result – Whether gql will unserialize the result. By default use the parse_results argument of the client.

  • get_execution_result – return the full ExecutionResult instance instead of only the “data” field. Necessary if you want to get the “extensions” field.

The extra arguments are passed to the transport execute method.

async fetch_schema() → None

Fetch the GraphQL schema explicitely using introspection.

Don’t use this function and instead set the fetch_schema_from_transport attribute to True

subscribe(document: graphql.language.ast.DocumentNode, *args, variable_values: Optional[Dict[str, Any]] = None, operation_name: Optional[str] = None, serialize_variables: Optional[bool] = None, parse_result: Optional[bool] = None, get_execution_result: Literal[False] = False, **kwargs) → AsyncGenerator[Dict[str, Any], None]
subscribe(document: graphql.language.ast.DocumentNode, *args, variable_values: Optional[Dict[str, Any]] = None, operation_name: Optional[str] = None, serialize_variables: Optional[bool] = None, parse_result: Optional[bool] = None, get_execution_result: Literal[True], **kwargs) → AsyncGenerator[graphql.execution.execute.ExecutionResult, None]

Coroutine to subscribe asynchronously to the provided document AST asynchronously using the async transport.

Raises a TransportQueryError if an error has been returned in

the ExecutionResult.

Parameters

  • document – GraphQL query as AST Node object.

  • variable_values – Dictionary of input parameters.

  • operation_name – Name of the operation that shall be executed.

  • serialize_variables – whether the variable values should be serialized. Used for custom scalars and/or enums. By default use the serialize_variables argument of the client.

  • parse_result – Whether gql will unserialize the result. By default use the parse_results argument of the client.

  • get_execution_result – yield the full ExecutionResult instance instead of only the “data” field. Necessary if you want to get the “extensions” field.

The extra arguments are passed to the transport subscribe method.

property transport
class gql.client.Client(schema: Optional[Union[str, graphql.type.schema.GraphQLSchema]] = None, introspection=None, transport: Optional[Union[gql.transport.transport.Transport, gql.transport.async_transport.AsyncTransport]] = None, fetch_schema_from_transport: bool = False, execute_timeout: Optional[Union[int, float]] = 10, serialize_variables: bool = False, parse_results: bool = False)

Bases: object

The Client class is the main entrypoint to execute GraphQL requests on a GQL transport.

It can take sync or async transports as argument and can either execute and subscribe to requests itself with the execute and subscribe methods OR can be used to get a sync or async session depending on the transport type.

To connect to an async transport and get an async session, use async with client as session:

To connect to a sync transport and get a sync session, use with client as session:

__init__(schema: Optional[Union[str, graphql.type.schema.GraphQLSchema]] = None, introspection=None, transport: Optional[Union[gql.transport.transport.Transport, gql.transport.async_transport.AsyncTransport]] = None, fetch_schema_from_transport: bool = False, execute_timeout: Optional[Union[int, float]] = 10, serialize_variables: bool = False, parse_results: bool = False)

Initialize the client with the given parameters.

Parameters

  • schema – an optional GraphQL Schema for local validation See Schema validation

  • transport – The provided transport.

  • fetch_schema_from_transport – Boolean to indicate that if we want to fetch the schema from the transport using an introspection query

  • execute_timeout – The maximum time in seconds for the execution of a request before a TimeoutError is raised. Only used for async transports. Passing None results in waiting forever for a response.

  • serialize_variables – whether the variable values should be serialized. Used for custom scalars and/or enums. Default: False.

  • parse_results – Whether gql will try to parse the serialized output sent by the backend. Can be used to unserialize custom scalars or enums.

execute(document: graphql.language.ast.DocumentNode, *args, **kwargs) → Dict

Execute the provided document AST against the remote server using the transport provided during init.

This function WILL BLOCK until the result is received from the server.

Either the transport is sync and we execute the query synchronously directly OR the transport is async and we execute the query in the asyncio loop (blocking here until answer).

This method will:

  • connect using the transport to get a session

  • execute the GraphQL request on the transport session

  • close the session and close the connection to the server

If you have multiple requests to send, it is better to get your own session and execute the requests in your session.

The extra arguments passed in the method will be passed to the transport execute method.

subscribe(document: graphql.language.ast.DocumentNode, *args, **kwargs) → Generator[Dict, None, None]

Execute a GraphQL subscription with a python generator.

We need an async transport for this functionality.

class gql.client.SyncClientSession(client: gql.client.Client)

Bases: object

An instance of this class is created when using with on the client.

It contains the sync method execute to send queries on a sync transport using the same session.

__init__(client: gql.client.Client)
Parameters

client – the client used

execute(document: graphql.language.ast.DocumentNode, *args, variable_values: Optional[Dict[str, Any]] = None, operation_name: Optional[str] = None, serialize_variables: Optional[bool] = None, parse_result: Optional[bool] = None, get_execution_result: Literal[False] = False, **kwargs) → Dict[str, Any]
execute(document: graphql.language.ast.DocumentNode, *args, variable_values: Optional[Dict[str, Any]] = None, operation_name: Optional[str] = None, serialize_variables: Optional[bool] = None, parse_result: Optional[bool] = None, get_execution_result: Literal[True], **kwargs) → graphql.execution.execute.ExecutionResult

Execute the provided document AST synchronously using the sync transport.

Raises a TransportQueryError if an error has been returned in

the ExecutionResult.

Parameters

  • document – GraphQL query as AST Node object.

  • variable_values – Dictionary of input parameters.

  • operation_name – Name of the operation that shall be executed.

  • serialize_variables – whether the variable values should be serialized. Used for custom scalars and/or enums. By default use the serialize_variables argument of the client.

  • parse_result – Whether gql will unserialize the result. By default use the parse_results argument of the client.

  • get_execution_result – return the full ExecutionResult instance instead of only the “data” field. Necessary if you want to get the “extensions” field.

The extra arguments are passed to the transport execute method.

fetch_schema() → None

Fetch the GraphQL schema explicitely using introspection.

Don’t use this function and instead set the fetch_schema_from_transport attribute to True

property transport