# -*- coding: utf-8 -*-

import datetime

import time

def concat(*args):

""" cancat strings

>>> concat(42, 'foo', 'bar')

'42foobar'

"""

return "".join([str(s) for s in args])

def concat_without_dot(args):

""" replace blank

>>> concat_without_dot('42foo bar')

'42foobar'

"""

return "".join([str(s) for s in args.split()])

def search_value(array, origin_key, origin_value, dest_key):

""" given origin key and value,search dest_value form array by dest_key

>>> d = [{"UHostId": "foo", "Name": "testing"}]

>>> search_value(d, "Name", "testing", "UHostId")

'foo'

"""

arr = [i.get(dest_key, "") for i in array if i[origin_key] == origin_value]

if arr:

return arr[0]

return ""

def timedelta(timestamp, value, typ="days"):

""" given timestamp(10bit) and calculate relative delta time

>>> timedelta(0, 1, "days")

86400.0

:param timestamp: timestamp (round to second)

:param value: float, can as positive or negative

:param typ: days/hours

:return: timestamp

"""

value = int(value)

dt = datetime.datetime.fromtimestamp(float(timestamp))

if typ == "days":

dt += datetime.timedelta(days=value)

elif typ == "hours":

dt += datetime.timedelta(hours=value)

return time.mktime(dt.timetuple())

def get_timestamp(length=13):

""" get current timestamp string

>>> len(str(int(get_timestamp(10))))

10

:param length: length of timestamp, can only between 0 and 16

:return:

"""

if isinstance(length, int) and 0 < length < 17:

return float("{:.6f}".format(time.time()).replace(".", "")[:length])

raise ValueError("timestamp length can only between 0 and 16.")