Incorrect Regex — HackerRank Problem Solution [Python3]

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Incorrect Regex — HackerRank Problem Solution [Python3]

CyberholicRFebruary 20, 2017

 Problem -

You are given a string .

Your task is to find out whether

is a valid regex or not.

Input Format

The first line contains integer

, the number of test cases.

The next lines contains the string

.

Constraints

Output Format

Print “True” or “False” for each test case without quotes.

Sample Input

2

.*\+

.*+

Sample Output

True

False

Explanation

.*\+ : Valid regex.

.*+: Has the error multiple repeat. Hence, it is invalid.

Solution:

# Enter your code here. Read input from STDIN. Print output to STDOUT

import re

n = int(input())

for i in range(n):

a = input()

try:

re.compile(a)

print(True)

except re.error:

print(False)