Lesson - Generator Expressions

lesson_generator_expressions.py

"""
So what’s the difference between Generator Expressions and List Comprehensions?
The generator yields one item at a time and generates item only when in demand. 
Whereas, in a list comprehension, Python reserves memory for the whole list. 
Thus we can say that the generator expressions are memory efficient than the lists.

Ref: https://www.geeksforgeeks.org/python-list-comprehensions-vs-generator-expressions/
"""

from sys import getsizeof 
  
comp = [i for i in range(10000)] 
gen = (i for i in range(10000)) 
  
#gives size for list comprehension 
x = getsizeof(comp)  
print("x = ", x) 
  
#gives size for generator expression 
y = getsizeof(gen)  
print("y = ", y)