import re


def extract_hashtags(text):
    """
    Extract hashtags in the text
    Original Post : https://stackoverflow.com/questions/2527892/
    :param text: ex. "I love #stackoverflow because #people are very #helpful!"
    :type text: str
    :return: ex. {'#stackoverflow', '#people', '#helpful!'}
    :rtype: set
    """
    return set(re.findall(r"#(\w+)", text))