Graphene Hello World

graphene_hello_world.py

# https://gist.github.com/a-y-khan/69189c26df2dcbc8a252b02af897977d

# Super-simple example from Graphene tutorial

import graphene
from gql import gql, Client

class Query(graphene.ObjectType):
	hello = graphene.String(argument=graphene.String(default_value='world'))

	# this is where the magic happens!
	# pattern is always resolve_<field>
	def resolve_hello(self, info, argument):
		# info:
		# ResolveInfo class: https://github.com/graphql-python/graphql-core
		return 'hello ' + argument

schema = graphene.Schema(query=Query)

if '__main__' == __name__:
	# GraphQL's serialization format is JSON!
	query = """
	{
		hello
	}
	"""
	query_with_argument = """
	{
		hello(argument: "Pythonistas!")
	}
	"""
	# result is OrderedDict
	result = schema.execute(query)
	print(result.data['hello'])
	result = schema.execute(query_with_argument)
	print(result.data['hello'])

	# using the Graphene GraphQL Python client
	# returns results directly (as OrderedDict, which is the same as above...)
	client = Client(schema=schema)
	gql_query = gql(query)
	gql_query_with_argument = gql(query_with_argument)
	result = client.execute(gql_query)
	print(result['hello'])
	result = client.execute(gql_query_with_argument)
	print(result['hello'])