Why spam and eggs

Answer 1

They are known as Metasyntactic variables https://www.sololearn.com/Discuss/90151/?ref=app

Answer 2

Spam and eggs are used as examples, you can use anything else also. Why they are so popular, this may have some historical reason.

Answer 3

This is because python is named in tribute to Monty python and spam and eggs are also a reference to him.

Answer 4

Haha always asked myself that!!