human
Solve the following python programming problem given the following code:
def build_client_schema(introspection) : 
    schema_introspection = introspection ['__schema'] 
    type_introspection_map = { t ['name'] : build_type for t in schema_introspection ['types'] } 
    type_def_cache = { 
        'String' : GraphQLString, 
        'Int' : GraphQLInt, 
        'Float' : GraphQLFloat, 
        'Boolean' : GraphQLBoolean, 
        'ID' : GraphQLID, 
} 
    def get_type(type_ref) : 
        kind = type_ref.get ('kind') 
        if (kind == TypeKind.LIST) : 
            item_ref = type_ref.get ('ofType') 
            if (not item_ref) : 
                raise Exception ('Decorated type deeper than introspection query.') 
return GraphQLList (get_type (item_ref)) 
else : 
            if (kind == TypeKind.NON_NULL) : 
                nullable_ref = type_ref.get ('ofType') 
                if (not nullable_ref) : 
                    raise Exception ('Decorated type deeper than introspection query.') 
return GraphQLNonNull (get_type (nullable_ref)) 
return get_named_type (type_ref ['name']) 
def get_named_type(type_name) : 
        if (type_name in type_def_cache) : 
            return type_def_cache [type_name] 
type_introspection = type_introspection_map.get (type_name) 
        if (not type_introspection) : 
            raise Exception ('Invalid or incomplete schema, unknown type: {}. Ensure that a full introspection query is used in order to build a client schema.'.format (type_name)) 
type_def = type_def_cache [type_name] = build_type (type_introspection) 
        return type_def 
def get_input_type(type_ref) : 
        input_type = get_type (type_ref) 
        assert is_input_type (input_type), 'Introspection must provide input type for arguments.' 
        return input_type 
def get_output_type(type_ref) : 
        output_type = get_type (type_ref) 
        assert is_output_type (output_type), 'Introspection must provide output type for fields.' 
        return output_type 
def get_object_type(type_ref) : 
        object_type = get_type (type_ref) 
        assert isinstance...

    
    

    Fix the buggy line: type_introspection_map = { t ['name'] : build_type for t in schema_introspection ['types'] }
assistant
#Here is Python program to fix the buggy line: type_introspection_map = { t ['name'] : build_type for t in schema_introspection ['types'] }
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type_introspection_map = { t ['name'] : t for t in schema_introspection ['types'] }