python dates

pydates.py

time.asctime([t])
t is response of gmtime() or localtime()

time.clock()

time.clock_gettime(clk_id) > float

time.clock_gettime_ns(clk_id) > float

# Returns the response in this format
time.ctime([secs]) > secs since epoch
>> 'Sun Jan 27 20:40:07 2019'

# Returns a structure
time.gmtime()
>> time.struct_time(tm_year=2019, tm_mon=1, tm_mday=28, tm_hour=4, tm_min=40, tm_sec=59, tm_wday=0, tm_yday=28, tm_isdst=0)


# Returns a structure
time.localtime()
>> time.struct_time(tm_year=2019, tm_mon=1, tm_mday=27, tm_hour=20, tm_min=42, tm_sec=4, tm_wday=6, tm_yday=27, tm_isdst=0)

# Sleep
time.sleep(secs)

# Convert time to a format
time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime())
>> '2019-01-28 04:43:49'


# Return the time in secs since epoch time as float
time.time()
>> 1548650688.857249

# Create a time from an incoming string
tz = '2019-01-28T04:43:49Z'
format = '%Y-%m-%dT%H:%M:%SZ'
time_struct=time.strptime(tz, format)
>> time.struct_time(tm_year=2019, tm_mon=1, tm_mday=28, tm_hour=4, tm_min=43, tm_sec=49, tm_wday=0, tm_yday=28, tm_isdst=-1)

# Create a string representation of time
time.strftime("%Y-%m-%d",time_struct)
'2019-01-28'

# Create a date representation from timestamp
>>> time.time()
1548651332.1780329

>>> datetime.date.fromtimestamp(time.time())
datetime.date(2019, 1, 27)

# Read time as string as  datetime
start=datetime.datetime.strptime("2018-01-01 00:00:00Z", "%Y-%m-%d %H:%M:%SZ")

# Apply math on it
delta_30_mins = datetime.timedelta(minutes=30)
start = end - delta_30_min

# Concurrency with thread pools
from concurrent import futures

def task(input):
    return "result"

def done_callback(fn: futures.Future):
    print(type(fn))
    if fn.cancelled():
        print("Task was cancelled")
    if fn.done():
      error = fn.exception()
      if error:
          print(error)
      else:
          print(fn.result())

pool = futures.ThreadPoolExecutor(max_workers=1)
future = pool.submit(task, "input")
future.add_done_callback(done_callback)