Standardize Mobile Number Using Decorators in python - HackerRank Solution

CodeWorld19
22 Oct, 2020
2
Standardize Mobile Number Using Decorators in python - HackerRank Solution
 

Problem :

 
Let's dive into decorators! You are given N mobile numbers. Sort them in ascending order then print them in the standard format shown below: 
+91 xxxxx xxxxx

The given mobile numbers may have +91, 91 or 0 written before the actual 10 digit number. Alternatively, there may not be any prefix at all.


Input Format :

The first line of input contains an integer N, the number of mobile phone numbers.
N lines follow each containing a mobile number.
 

Output Format :

Print N mobile numbers on separate lines in the required format.


Sample Input :

3
07895462130
919875641230
9195969878

Sample Output :

+91 78954 62130
+91 91959 69878
+91 98756 41230

Concept :

Like most other programming languages, Python has the concept of closures. Extending these closures gives us decorators, which are an invaluable asset. You can learn about decorators in 12 easy steps here.
To solve the above question, make a list of the mobile numbers and pass it to a function that sorts the array in ascending order. Make a decorator that standardizes the mobile numbers and apply it to the function.


Solution :

 
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# Standardize Mobile Number Using Decorators in python - Hacker Rank Solution
# Python 3
def wrapper(f):
    def fun(l):
        # complete the function
        # Standardize Mobile Number Using Decorators in python - Hacker Rank Solution START
        f(['+91 ' + c[-10:-5] + ' ' + c[-5:] for c in l])
        # Standardize Mobile Number Using Decorators in python - Hacker Rank Solution END
    return fun

@wrapper
def sort_phone(l):
    print(*sorted(l), sep='\n')

if __name__ == '__main__':
    l = [input() for _ in range(int(input()))]
    sort_phone(l)




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2 Comments
  • Anonymous
    Anonymous Tuesday, March 21, 2023

    when I write the same program on PyCharm there is showing Indentation error.
    How to correct the program , please provide some advice regarding this problem.

    • CodeWorld19
      CodeWorld19 Monday, April 03, 2023

      In python, indentation is very important as it is used to define the scope of control statement, loop, function, classes, and other block of code. If there is an error in the indentation, it will result in an "IndentationError" (here indentation means space in your code)
      For example :-
      //the following code give you indentation error
      def my_function():
      print("hello world!")

      // you can resolve it by given proper space
      def my_function():
      print("hello world!")

    Reply
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