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Datetime ​

Parsing ​

python
# get current datetime in specified tz
datetime.now(timezone("Asia/Bangkok"))

# to string
datetime.now().strftime("%Y-%m-%d %H:%M:%S")

# from string
datetime.strptime("2022-01-01", "%Y-%m-%d")

# from epoch timestamp
datetime.fromtimestamp(1347517370 / 1000)

Generate day bound ​

python
os.environ["TZ"] = "Asia/Bangkok"

day_lower_th = parse(day)
utc = pytz.timezone("UTC")

# bounds (now in UTC)
day_lower = day_lower_th.astimezone(utc)
day_upper = day_lower + timedelta(days=1)

Find elapsed time ​

python
import time

start_time = time.time()

# ... do stuff

end_time = time.time()
print("Elapsed time was %g seconds" % (end_time - start_time))
python
import timeit

start = timeit.default_timer()
# Your statements here
stop = timeit.default_timer()
print("Time: ", stop - start)

Countdown function ​

python
def countdown(t):
    print("--- SLEEP ---")
    while t:
        mins, secs = divmod(t, 60)
        timeformat = "{:02d}:{:02d}".format(mins, secs)
        print(timeformat, end="\r")
        sleep(1)
        t -= 1

Time decorator ​

python
from horology import timed  # pip install horology


@timed  # put this line above ALL functions
def compute_magic(n):
    counter = 0
    for i in range(n):
        counter += i

    print(counter)
    return counter


compute_magic(10000000)

# output
# compute_magic: 681.55 ms