from bs4 import BeautifulSoup

ALL_SUBSTANCE = "https://www.erowid.org/experiences/exp_list.shtml"
    substance_list = []
    data = requests.get(ALL_SUBSTANCE)
    content = data.content
    substance_soup = BeautifulSoup(content, 'html.parser')
    for link in substance_soup.findAll('a'):
            print(link)