app.py

import streamlit as st
import pandas as pd
import transformers
from transformers import  pipeline, TokenClassificationPipeline, BertForTokenClassification , AutoTokenizer , TextClassificationPipeline , AutoModelForSequenceClassification

st.header("Knowledge extraction on Endocrine disruptors")
st.write("This tool lets you extract relation triples concerning interactions between: endocrine disrupting chemicals, hormones, receptors and cancers.")
st.write("It is the result of an end of studies project within ESI school and dedicated to biomedical researchers looking to extract precise information about the subject without digging into long publications.")

form = st.form(key='my-form')
x = form.text_input('Enter your text')
submit = form.form_submit_button('Submit')

if submit and len(x) != 0:  
  #model.to("cpu")
  tokenizer = AutoTokenizer.from_pretrained("dmis-lab/biobert-large-cased-v1.1", truncation = True, padding=True, model_max_length=512,)
  model_checkpoint = BertForTokenClassification.from_pretrained("dexay/Ner2HgF", )
  
  
  model_re = AutoModelForSequenceClassification.from_pretrained("dexay/reDs3others", )
  token_classifier = pipeline("token-classification", tokenizer = tokenizer,model=model_checkpoint,  )
  
  st.text("Knowledge extraction is in progress ...")
  
  if x[-1] not in ".?:":
    x += "."
  
  biotext = x
  
  #split document or text into sentences
  
  lstbiotext = []
  
  flag = 0
  tempsen = ""
  for e in biotext:
    tempsen += e
    if e=="(":
        flag = 1
    if e==")":
        flag = 0
    if (e =="." or e =="?" or e ==":" ) and flag == 0 :
        lstbiotext += [tempsen.strip()]
        tempsen = ""
  
  ddata = lstbiotext
  
  #tokenized_dat = tokenize_function(ddata) 
  
  az = token_classifier(ddata)
  
  
  #code to convert NER output to  RE input compatible format
  
  #tg_inorder are decoding of labels on which the model was fine tuned on 
  
  tg_inorder = ['O',
   'B-HORMONE',
   'B-EXP_PER',
   'I-HORMONE',
   'I-CANCER',
   'I-EDC',
   'B-RECEPTOR',
   'B-CANCER',
   'I-RECEPTOR',
   'B-EDC',
   'PAD']
  
  lstSentEnc = []
  lstSentbilbl = []
  lstSentEnt = []
  for itsent in az:
    
    sentaz = itsent
    ph = []
    phl = []
    for e in sentaz:
      if e["word"][0]=="#" and len(ph)!=0:
        ph[-1]+= e["word"][2:]
      else:
        ph += [e["word"]]
        phl += [e["entity"]]
  
  
    phltr = []
    for e in phl:
      phltr += [tg_inorder[int(e[-1])] if len(e)==7 else  tg_inorder[int(e[-2:])]]
    
  
    nwph = []
    nwphltr = []
    flag = 0
    for i in range(len(phltr)-2):
      if phltr[i]=="O" and flag != 3 :
        nwph += [ph[i]]
        nwphltr += [phltr[i]]
        continue
      elif flag == 3:
        nwph[-1] += " "+ph[i]
        flag = 1
        continue
      elif phltr[i][2:]==phltr[i+1][2:] and phltr[i+1][0]=="I" and flag == 0:
        nwph += [ph[i]]
        nwphltr += [phltr[i]]
        flag = 1
        continue
      elif phltr[i][2:]==phltr[i+1][2:] and phltr[i+1][0]=="I" and flag == 1:
        nwph[-1] += " "+ph[i]
        continue
  # xox with flag == 3
      elif phltr[i][2:]==phltr[i+2][2:] and phltr[i+1]=="O" and phltr[i+2][0]=="I" and flag == 0:
        nwph += [ph[i]]
        nwphltr += [phltr[i]]
        flag = 3
        continue
      elif phltr[i][2:]==phltr[i+2][2:] and phltr[i+1]=="O" and phltr[i+2][0]=="I" and flag == 1:
        nwph[-1] += " "+ph[i]
        flag = 3
        continue
  #\ xox
      elif flag == 1:
        nwph[-1] += " "+ph[i]
        flag = 0
        continue
      else :
        nwph += [ph[i]]
        nwphltr += [phltr[i]]
        continue
        
  
    # nwph,nwphltr,len(nwph),len(nwphltr)
    
  
    if nwphltr.count("O") <= len(nwphltr)-2:
      for i in range(len(nwph)-1):
        if nwphltr[i] != "O":
          for j in range(i,len(nwph)):
            if nwphltr[j] != "O" and nwphltr[j] != nwphltr[i] and {nwphltr[j], nwphltr[i]} != {"B-CANCER","B-RECEPTOR"}:
              sen2ad = ""
              for g in range(i):
                sen2ad += nwph[g]+" "
              sen2ad += "<e1>"+nwph[i]+"</e1> "
  
              for t in range(i+1,j):
                sen2ad += nwph[t]+" "
              sen2ad += "<e2>"+nwph[j]+"</e2>"
              if j<len(nwph):
                for l in range(j+1,len(nwph)):
                  sen2ad += " "+nwph[l]
              lstSentEnc += [sen2ad]
              lstSentbilbl += [[nwphltr[i],nwphltr[j]]]
              lstSentEnt += [[nwph[i],nwph[j]]]
        
  
  
  #lstSentEnc,lstSentEnt,lstSentbilbl
  
  st.text("Entities detected, Next: Relation detection ...")
  
  
  # Relation extraction part
  
  token_classifier = pipeline("text-classification", tokenizer = tokenizer,model=model_re, 
  )
  
  rrdata = lstSentEnc
  
  
  
  outre = token_classifier(rrdata)
  
  
  trLABELS = ['INCREASE_RISK(e1,e2)',
   'SPEED_UP(e2,e1)',
   'DECREASE_ACTIVITY(e1,e2)',
   'NO_ASSOCIATION(e1,e2)',
   'DECREASE(e1,e2)',
   'BLOCK(e1,e2)',
   'CAUSE(e1,e2)',
   'ACTIVATE(e2,e1)',
   'DEVELOP(e2,e1)',
   'ALTER(e1,e2)',
   'INCREASE_RISK(e2,e1)',
   'SPEED_UP(e1,e2)',
   'INTERFER(e1,e2)',
   'DECREASE(e2,e1)',
   'NO_ASSOCIATION(e2,e1)',
   'INCREASE(e2,e1)',
   'INTERFER(e2,e1)',
   'ACTIVATE(e1,e2)',
   'INCREASE(e1,e2)',
   'MIMIC(e1,e2)',
   'MIMIC(e2,e1)',
   'BLOCK(e2,e1)',
   'other',
   'BIND(e2,e1)',
   'INCREASE_ACTIVITY(e2,e1)',
   'ALTER(e2,e1)',
   'CAUSE(e2,e1)',
   'BIND(e1,e2)',
   'DEVELOP(e1,e2)',
   'DECREASE_ACTIVITY(e2,e1)']
  
  
  
  outrelbl = []
  for e in outre:
    outrelbl += [trLABELS[int(e['label'][-1])] if len(e["label"])==7 else trLABELS[int(e['label'][-2:])] ]
  
  for i in range(len(outrelbl)):
    if "(e2,e1)" in outrelbl[i]:
      lstSentbilbl[i][0],lstSentbilbl[i][1] = lstSentbilbl[i][1],lstSentbilbl[i][0]
      lstSentEnt[i][0],lstSentEnt[i][1] = lstSentEnt[i][1],lstSentEnt[i][0]
  
  
  edccan = []
  
  
  for i in range(len(outrelbl)):
    if outrelbl[i] != "other":
      edccan += [[lstSentEnc[i],lstSentEnt[i][0], lstSentEnt[i][1],lstSentbilbl[i][0]+" "+outrelbl[i][:-7]+" "+lstSentbilbl[i][1]]]
   
  edccandf = pd.DataFrame(edccan, columns= ["Sentence", "Entity 1", "Entity 2", "Relation"] )
  
  
  st.table(edccandf)