python3 pdf_scrapper.py
usage: pdf_scrapper.py [-h] url pdf_scrapper.py: error: the following arguments are required: url
python3 pdf_scrapper.py -h
usage: pdf_scrapper.py [-h] url
positional arguments: url url that needs to be searched for pdf files
optional arguments: -h, --help show this help message and exit
python3 pdf_scrapper.py https://www.winmeen.com/book-back-questions-answers-pdf-tamil-english/
python3 pdf_scrapper.py https://www.winmeen.com/tamilnadu-2nd-standard-new-samacheer-kalvi-textbooks-in-tamil-medium-english-medium/