https://app.programiz.pro/community-challenges/challenge/

SOME HARD CHALLENGES FOR ME

 https://app.programiz.pro/community-challenges/challenge/flatten-nested-list-iterator/info 

Problem Chalange

SOLUTION

Note: same function is used in the function recursivly 

def flatten_nested_list(nested_list):

    rl=[]

    for item in nested_list:

        if type(item) == list:

            rl.extend(flatten_nested_list(item))

        else:

            rl.append(item)

    return rl

Problem Challenge

solution:

def convert_to_title(n):

    result=''

    no26 = 0

    r = n -26

    while r > 0:

        no26+=1

        r = r -26

    alpha1=''

    if no26 > 0:

        alpha1=chr(64+no26)

        alpha2=chr(64+n-(26*no26))

    else:

        alpha2=chr(64+n)

    return alpha1+alpha2

Problem Challenge

 Solution 

Used two main functions

        1. To convert string to date datetime.strptime(strdate,format) is used

        2, To convert from date to string format datetime.strftime(date, format) is used

from datetime import datetime

def convert_date_format(date):

    mdate=datetime.strptime(date,'%d-%m-%Y')

    return datetime.strftime(mdate,'%m-%d-%Y')