Generator Expressions vs. List Comprehension

Question

When should you use generator expressions and when should you use list comprehensions in Python?

# Generator expression
(x*2 for x in range(256))

# List com         


        

Answer 1

Use list comprehensions when the result needs to be iterated over multiple times, or where speed is paramount. Use generator expressions where the range is large or infinite.

See Generator expressions and list comprehensions for more info.