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Introduction To Python
Python is a widely-used, interpreted, object-oriented, and high-level programming language with dynamic semantics, used for general-purpose programming. It was created by Guido van Rossum, and first released on February 20, 1991.
Python is a computer programming language often used to build websites and software, automate tasks, and conduct data analysis. It is also used to create various machine learning algorithm, and helps in Artificial Intelligence. Python is a general purpose language, meaning it can be used to create a variety of different programs and isn’t specialized for any specific problems. This versatility, along with its beginner-friendliness, has made it one of the most-used programming languages today. A survey conducted by industry analyst firm RedMonk found that it was the most popular programming language among developers in 2020.
Link for the Problem – Standardize Mobile Number Using Decorators in python – HackerRank Solution
Standardize Mobile Number Using Decorators in python – HackerRank Solution
Problem:
Let’s dive into decorators! You are given 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 , or written before the actual digit number. Alternatively, there may not be any prefix at all.
Input Format
The first line of input contains an integer , the number of mobile phone numbers.
lines follow each containing a mobile number.
Output Format
Print 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.
Standardize Mobile Number Using Decorators in python – HackerRank Solution
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)
