Yes. It is Chayote which is a squash and can be substitued with summer squash. It is used in the cuisine of many countries and is native to Mexico.

Thanks, Violet. I grew the spiny chayote last year but I have not seen this bumpy kind. If it leafs out I will plant it.

I think, it is guava , if it has a lot of seeds.
Chayote has only one big seed.

boyang16, it was a chayote. Unfortunately the vendor removed the stem so it did not sprout. It did not have seeds like a guava.