Python get dict item speeds

from timeit import timeit
import random
import string

random.choice(string.ascii_lowercase)

VALUES_COUNT = 1000

values = {}


def gen_random_str():
    return ''.join(random.choice(string.ascii_letters) for _ in range(random.randint(10, 40)))


for _ in range(VALUES_COUNT):
    values[gen_random_str()] = 'value'


existing_key = random.choice(list(values.keys()))
non_existing_key = gen_random_str()
while non_existing_key in values:
    non_existing_key = gen_random_str()


def use_existing():
    return values[existing_key]


def with_try_exists():
    try:
        return values[existing_key]
    except KeyError:
        pass


def with_try_not_exists():
    try:
        return values[non_existing_key]
    except KeyError:
        pass


def with_in_check_exist():
    if existing_key in values:
        return values[existing_key]


def with_in_check_not_exist():
    if non_existing_key in values:
        return values[non_existing_key]


def with_get_exists():
    values.get(existing_key)


def with_get_not_exists():
    values.get(non_existing_key)


timeit(use_existing)

timeit(with_try_exists)
timeit(with_try_not_exists)

timeit(with_in_check_exist)
timeit(with_in_check_not_exist)

timeit(with_get_exists)
timeit(with_get_not_exists)


'''
>>> timeit(use_existing)
0.09614359300030628
>>>
>>> timeit(with_try_exists)
0.10425232600027812
>>> timeit(with_try_not_exists)
0.297110736999457
>>>
>>> timeit(with_in_check_exist)
0.13227759299843456
>>> timeit(with_in_check_not_exist)
0.10016654199716868
>>>
>>> timeit(with_get_exists)
0.1631382230007148
>>> timeit(with_get_not_exists)
0.1656956420010829
>>>
'''