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def day_of_week(date):
    """ get weekday from date (as instance 2022-12-31 iso format) """
    # 
    year = int(date[0:4])
    month = int(date[5:7])
    day = int(date[8:10])
    offset = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334]
    week   = ['Sunday', 
              'Monday', 
              'Tuesday', 

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We couldn’t find that file to show.

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def estimate_timedelta(td):
    """returns estimate timedelta in format 'YY year MM mon DD day'. consider plural form or absence y/m/d"""
    if td.days > 0:
        y, rem = divmod(td.days, 365)
        m, d =  divmod(rem, 31) 
        dict_ = {'year': y, 'mon': m, 'day':d }
        return " ".join([f"{dict_[k]} {k}" + ("s" if dict_[k] > 1 else "") for k in dict_ if dict_[k] > 0 ])
    else:
        return str(td)

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from itertools import permutations
from functools import reduce
import re
import operator

_DEBUG = False
_DEBUG_PRINT_PER_TRIES = 1000


def infix_postfix(command):

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import pandas as pd
import requests
from bs4 import BeautifulSoup


def get_html(url):
    r = requests.get(url=url)
    return r.text

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from itertools import groupby
def solution(args):
  # [-3,-2,-1,2,10,15,16,18,19,20]  ->  [[-3, -2, -1], [2], [10], [15, 16], [18, 19, 20]]
  grps = ([v[1] for v in g] for _,g in groupby(enumerate(args), lambda p: p[1]-p[0]))
  #[[-3, -2, -1], [2], [10], [15, 16], [18, 19, 20]]  ->  -3--1,2,10,15,16,18-20
  return ','.join('{}{}{}'.format(g[0],'-'if len(g)>2 else',',g[-1])
    if len(g)>1 else str(g[0]) for g in grps)

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# to run this module from command line typing 
#
#      > python robot_navigation.py robot_data.json
#
# it reads the starting and the finishing points as well as 
# the list of obstacles from robot_data.json file and then 
# runs find_path() function that has to return the path
#

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# https://www.codewars.com/kata/56a1c074f87bc2201200002e/
# modified merge sort counting left > right cases
def countsort(arr, cntarr, cntdict):
    if len(arr) > 1:
        mid = len(arr) // 2
        left = arr[:mid]
        leftcount = cntarr[:mid]
        right = arr[mid:]
        rightcount = cntarr[mid:]
         

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regexp: https://regex101.com/r/iqfDq3/5
((eth|v)\d+|(en|sl|wl|ww|ib)(o|s\d+(f\d+)?d(\d+)?|(P\d+)?((p\d+)(s\d+)|(?<!s\d)(p\d+)|(s\d+)(?!p\d))((f\d+)?((u\d+){1,4})?(i\d)?|(d\d+)?)|x[0-9a-f]{12}))


/*
 * Predictable network interface device names based on:
 *  - firmware/bios-provided index numbers for on-board devices
 *  - firmware-provided pci-express hotplug slot index number
 *  - physical/geographical location of the hardware
 *  - the interface's MAC address

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from scipy import stats
import math
def confidence_interval(sd, mean, n, target_interval):
    """sd - выборочное среднее значение
    mean - среднее выборки
    n - размер выборки
    target interval - 0..1, например 0.95, 0.99
    """
    alpha = 1 - target_interval
    z = abs(stats.norm.ppf(alpha/2))