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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 – Incorrect Regex in Python – HackerRank Solution
Incorrect Regex in Python – HackerRank Solution
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.
Incorrect Regex in Python – HackerRank Solution
import re; N = int(input()) for _ in range(N): try: re.compile(input()) Output = True except re.error: Output = False print(Output)
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