The owners and staff at a pet store in Sydney's south west are devastated their pet python was stolen in a brazen daylight break-in at the weekend.

The snake called Everest was one of eight snakes stolen after a man smashed through the door of Macarthur Pets on Steer Road at Gregory Hills on Sunday morning.

Macarthur Pets accounts and marketing manager Lani Welling said the man smashed through the front door with a duffle bag in his hand.

"We have a display tank with our albino Darwin carpet python snake — his name is Everest — he's our shop snake," she said.

"He's eight-foot-long and six years old. The burglar went straight for him."

Ms Welling said Everest was a very special snake.

"Everest was not overly common. I think his colouring and size is what made him so special," she said.

"He had a pretty fabulous temperament so we would use him for advertising, photos, Easter show, reptile shows that kind of thing. He would spend a lot of time out in the media."

Reptiles popular as pets in Australia

Brooke Winters with Everest the albino Darwin carpet python, who was stolen from Macarthur Pets. ( Timothy Clapin: News Corp )

Ms Welling said there had been a large increase in the popularity of reptiles as pets in Australia.

"Everest had a really strong bond with our store manager Brooke," she said.

"Snakes are all individuals, just like human beings. An eight-foot snake is not something that just turns up, someone must know something."

Detective Inspector Jayne Doherty from the Camden Local Area Police Command is calling for public help in finding the snakes.