Hex Color Code HackerRank Solution In Python

Problem

CSS colors are defined using a hexadecimal (HEX) notation for the combination of Red, Green, and Blue color values (RGB).

Specifications of HEX Color Code

■ It must start with a ‘#‘ symbol.
■ It can have 3 or 6 digits.
■ Each digit is in the range of 0 to F. ( 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, A, B, C, D, Eand F).
■ A – F  letters can be lower case. ( and  are also valid digits).

Examples

Valid Hex Color Codes#FFF #025 #F0A1FB Invalid Hex Color Codes#fffabg#abcf#12365erff

You are given N lines of CSS code. Your task is to print all valid Hex Color Codes, in order of their occurrence from top to bottom.

CSS Code Pattern

Selector
{
	Property: Value;
}

Input Format

The first line contains N, the number of code lines.
The next N lines contains CSS Codes.

Constraints

0 < N < 50

Output Format

Output the color codes with ‘#‘ symbols on separate lines.

Sample Input

11#BED{    color: #FfFdF8; background-color:#aef;    font-size: 123px;    background: -webkit-linear-gradient(top, #f9f9f9, #fff);}#Cab{    background-color: #ABC;    border: 2px dashed #fff;}   

Sample Output

#FfFdF8#aef#f9f9f9#fff#ABC#fff

Explanation

#BED and #Cab satisfy the Hex Color Code criteria, but they are used as selectors and not as color codes in the given CSS.

Hence, the valid color codes are:

#FfFdF8#aef#f9f9f9#fff#ABC#fff

Note: There are no comments ( // or /* */) in CSS Code.

Solution – Hex Color Code In Python | HackerRank

import repattern = r"(?<!^)(#(?:[a-f0-9]{6}|[a-f0-9]{3}))"for _ in range(int(input())):    me = re.findall(pattern, input(), flags=re.I)    if len(me) > 0:        print("\n".join(me))