lachlan-eagling

type User struct {
	firstName string
	lastName  string
	username string
	age       int
}

lachlan-eagling

from typing import List, Dict
from models import Employee

def process_employees(employees):
	employee_dict = {}
	for employee in employees:
    	employee_dict[employee.id] = employee
  return employee_dict

def process_employees(employees: List[Employee]) -> Dict[int, Employee]:

lachlan-eagling

import cProfile

print("Generator Runtime Stats:")
cProfile.run('sum((i for i in range(100000)))')

print("List Runtime Stats:")
cProfile.run('sum([i for i in range(100000)])')

Generator Runtime Stats:
         100005 function calls in 0.123 seconds

lachlan-eagling

from sys import getsizeof

size = 50_000
generator = (i for i in range(size))
lst = [i for i in range(size)]

print(f"Generator Size: {getsizeof(generator)} bytes")
print(f"List Size: {getsizeof(lst)} bytes")

>>> Generator Size: 112 bytes

lachlan-eagling

generator = sequence_generator(3)

try:
	  print(next(generator))
    print(next(generator))
    print(next(generator))
    print(next(generator))  # This call to next will raise an exception.
except StopIteration:
	  print("Generator exhausted")

lachlan-eagling

def sequence_generator(n):
	for i in range(n):
    	yield i

generator = sequence_generator(3)
print(next(generator))
>>> 0

for i in generator:
	print(i)

lachlan-eagling

for i in (x for x in range(n)):
  do_something(i)

lachlan-eagling

def fib_generator(n):
    i, j = 0, 1
    for _ in range(n):
        yield i
        i, j = j, i + j

lachlan-eagling

def ininite_number_generator(increment=1):
	i := 0
    while True:
    	yield i
        i += increment

lachlan-eagling

def read_chunks(filename, mode="r", chunk_size=32):
    with open(filename, mode) as f:
        while True:
            data = f.read(chunk_size)
            if not data:
                break
            yield data


def main():