library.py

from registration import update_reg
from anvil.tables import app_tables
from PyPDF2 import PdfReader
from io import BytesIO
# from notebook_funcs import get_message

def get_files():
    update_reg('get_files')
    retval=''
    query=app_tables.files.search()
    for r in query:
        retval+=r['filename']+'\n'
    return retval

def get_file(name):
    update_reg('get_file')
    retval=''
    r=app_tables.files.get(filename=name)
    bts=r['file'].get_bytes()
    sio=BytesIO(bts)
    with sio as f:
        reader=PdfReader(f)
        fpage=reader.pages[0].extract_text()
    retval+=r['filename']+'\n'+ fpage
    return retval