python generators

A generator in python is a function that returns an iterator using the yield keyword. This means we can use it with next() or in a for loop. This is common for dataloader. It is an object you can (infinitely) pull from.

def fib(limit):
	a, b = 0, 1
	while a < limit:
		yield a
		a, b = b, a + b
 
# create a generator object
x = fib(5)
 
print(next(x)) # 0
print(next(x)) # 1
print(next(x)) # 1
print(next(x)) # 2
print(next(x)) # 3
 
# use in for loop
for i in fib(5):
	print(i)