Generator

An infinite list cannot be enumerated because of the limits of ram. But we could use the generator to identify the principles of list generation.

Note: use the generator as the List Comprehensions but replace the [] by ()

l=[x*(x-1) for x in rang(100)]
g=(x*(x-1) for x in rang(100))

l is a list while the g is a generator

how to call a generator

• the function next() can help you obtain the next value of the generator
• you can also obtain the value by for loop