import re

regex = r"/[^\d/=\r\n]*(\d)/"
strings = [
    "https://f...content-available-to-author-only...y.com/ailments/body/10-home-remedies-for-styes/pageid=2/slide_3/",
    "https://f...content-available-to-author-only...y.com/ailments/body/10-home-remedies-for-styes/pageid=2/sno3/",
    "https://f...content-available-to-author-only...y.com/ailments/body/10-home-remedies-for-styes/pageid=2/3/",
    "https://f...content-available-to-author-only...y.com/ailments/body/10-home-remedies-for-styes/pageid=2/slide/",
    "https://f...content-available-to-author-only...y.com/ailments/body/10-home-remedies-for-styes/pageid=2/slide_33/",
    "https://f...content-available-to-author-only...y.com/ailments/body/10-home-remedies-for-styes/pageid=2/33/"
]

for s in strings:
    matches = re.search(regex, s)
    if matches:
        print ("Group {groupNum} found at {start}-{end} value:{group}".format(groupNum = 1, start = matches.start(1), end = matches.end(1), group = matches.group(1)))