Lansbury, who spent part of last season on loan at Watford, is thriving in the environment of training with the senior team.
He told arsenal.com: "You just can't stop learning from them. Just watching the way they play and to train with them most days - [I learn from] the way they move the ball and their movement and positioning on the field.
"It's good to train with people like Samir Nasri. They're more than happy to help me out, I talk to them all the time and they help me a lot."