app.py

# -*- coding: utf-8 -*-
"""
# MANIFESTO ANALYSIS
"""

##IMPORTING LIBRARIES
import random
import matplotlib.pyplot as plt
import nltk
from nltk.tokenize import word_tokenize,sent_tokenize
from nltk.corpus import stopwords
from nltk.stem.porter import PorterStemmer
from nltk.stem import WordNetLemmatizer
from nltk.corpus import stopwords 
from nltk.tokenize import word_tokenize
from nltk.probability import FreqDist
from cleantext import clean
import textract
import urllib.request
import nltk.corpus  
from nltk.text import Text
import io
from io import StringIO,BytesIO
import sys 
import pandas as pd
import cv2
import re
from wordcloud import WordCloud, STOPWORDS, ImageColorGenerator
from textblob import TextBlob
from PIL import Image
import os
import gradio as gr
from zipfile import ZipFile
import contractions
import unidecode


nltk.download('stopwords')
nltk.download('punkt')
nltk.download('wordnet')
nltk.download('words')


"""## PARSING FILES"""

#def Parsing(parsed_text):
  #parsed_text=parsed_text.name
  #raw_party =parser.from_file(parsed_text) 
 # raw_party = raw_party['content']
#  return clean(raw_party)
  
def Parsing(parsed_text):
  parsed_text=parsed_text.name
  raw_party =textract.process(parsed_text, encoding='ascii',method='pdfminer') 
  return clean(raw_party)


#Added more stopwords to avoid irrelevant terms
stop_words = set(stopwords.words('english'))
stop_words.update('ask','much','thank','etc.', 'e', 'We', 'In', 'ed','pa', 'This','also', 'A', 'fu','To','5','ing', 'er', '2')

"""## PREPROCESSING"""

def clean_text(text):
  '''
  The function which returns clean text
  '''
  text = text.encode("ascii", errors="ignore").decode("ascii")  # remove non-asciicharacters
  text=unidecode.unidecode(text)# diacritics remove
  text=contractions.fix(text) # contraction fix
  text = re.sub(r"\n", " ", text)
  text = re.sub(r"\n\n", " ", text)
  text = re.sub(r"\t", " ", text)
  text = re.sub(r"/ ", " ", text)
  text = text.strip(" ")
  text = re.sub(" +", " ", text).strip()  # get rid of multiple spaces and replace with a single
  
  text = [word for word in text.split() if word not in stop_words]
  text = ' '.join(text)
  return text

# text_Party=clean_text(raw_party)

def Preprocess(textParty):
  '''
  Removing special characters extra spaces
  '''
  text1Party = re.sub('[^A-Za-z0-9]+', ' ', textParty) 
  #Removing all stop words
  pattern = re.compile(r'\b(' + r'|'.join(stopwords.words('english')) + r')\b\s*')
  text2Party = pattern.sub('', text1Party)
  # fdist_cong = FreqDist(word_tokens_cong)
  return text2Party





'''
  Using Concordance, you can see each time a word is used, along with its 
  immediate context. It can give you a peek into how a word is being used
  at the sentence level and what words are used with it 
'''
def concordance(text_Party,strng):
  word_tokens_party = word_tokenize(text_Party)
  moby = Text(word_tokens_party) 
  resultList = []
  for i in range(0,1):
      save_stdout = sys.stdout
      result = StringIO()
      sys.stdout = result
      moby.concordance(strng,lines=4,width=82)    
      sys.stdout = save_stdout      
  s=result.getvalue().splitlines()
  return result.getvalue()
  

def normalize(d, target=1.0):
   raw = sum(d.values())
   factor = target/raw
   return {key:value*factor for key,value in d.items()}

def fDistance(text2Party):
  '''
  Most frequent words search
  '''
  word_tokens_party = word_tokenize(text2Party) #Tokenizing
  fdistance = FreqDist(word_tokens_party).most_common(10)
  mem={}
  for x in fdistance:
    mem[x[0]]=x[1]
  return normalize(mem)

def fDistancePlot(text2Party,plotN=15):
  '''
  Most Frequent Words Visualization
  '''
  word_tokens_party = word_tokenize(text2Party) #Tokenizing
  fdistance = FreqDist(word_tokens_party)
  plt.title('Frequency Distribution')
  plt.axis('off')
  plt.figure(figsize=(4,3))
  fdistance.plot(plotN)
  plt.tight_layout()
  buf = BytesIO()
  plt.savefig(buf)
  buf.seek(0)
  img1 = Image.open(buf)
  plt.clf() 
  return img1


def DispersionPlot(textParty):
  '''
  Dispersion PLot
  '''
  word_tokens_party = word_tokenize(textParty) #Tokenizing
  moby = Text(word_tokens_party) 
  fdistance = FreqDist(word_tokens_party)
  word_Lst=[]
  for x in range(5):
    word_Lst.append(fdistance.most_common(6)[x][0]) 
  
  plt.axis('off')
  plt.title('Dispersion Plot')
  plt.figure(figsize=(4,3))
  moby.dispersion_plot(word_Lst)
  plt.plot(color="#EF6D6D")
  plt.tight_layout()
  buf = BytesIO()
  plt.savefig(buf)
  buf.seek(0)
  img = Image.open(buf)
  plt.clf() 
  return img


def getSubjectivity(text):
  
  '''
  Create a function to get the polarity
  '''
  return TextBlob(text).sentiment.subjectivity


def getPolarity(text):
  '''
  Create a function to get the polarity
  '''
  return  TextBlob(text).sentiment.polarity
  
  
def getAnalysis(score):
  if score < 0:
    return 'Negative'
  elif score == 0:
    return 'Neutral'
  else:
    return 'Positive'
def Original_Image(path):
  img= cv2.imread(path)
  img= cv2.cvtColor(img, cv2.COLOR_BGR2RGB)  
  return img

def Image_Processed(path):
  '''
  Reading the image file
  '''
  img= cv2.imread(path)
  img= cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
  
  #Thresholding
  ret, bw_img = cv2.threshold(img, 124, 255, cv2.THRESH_BINARY)

  return bw_img
 
def wordCloud(orgIm,mask_img,text_Party_pr,maxWord=2000,colorGener=True,contCol='white',bckColor='white'):
  '''
  Generating word cloud
  '''
  
  mask =mask_img
  # Create and generate a word cloud image:
  wordcloud = WordCloud(max_words=maxWord, background_color=bckColor,
                        mask=mask,
                        colormap='nipy_spectral_r',
                        contour_color=contCol,
                        width=800, height=800,
                        margin=2,
                        contour_width=3).generate(text_Party_pr)

  # create coloring from image

  
  
  if colorGener==True:
    image_colors = ImageColorGenerator(orgIm)
    plt.imshow(wordcloud.recolor(color_func= image_colors),interpolation="bilinear")
    
  
  else:    
    plt.imshow(wordcloud)
    
  
  plt.axis("off")
  
def word_cloud_generator(parsed_text_name,text_Party):
  parsed=parsed_text_name.lower()

  if 'bjp' in parsed:
    orgImg=Original_Image('bjpImg2.jpg')
    bwImg=Image_Processed('bjpImg2.jpg')
    plt.figure(figsize=(15,12))
    wordCloud(orgImg,bwImg,text_Party,maxWord=3000,colorGener=True,contCol='white',bckColor='black')
    
    plt.tight_layout()
    buf = BytesIO()
    plt.savefig(buf)
    buf.seek(0)
    img1 = Image.open(buf)
    plt.clf() 
    return img1

  
  elif 'congress' in parsed:
    orgImg=Original_Image('congrsMain.jpg')
    bwImg=Image_Processed('congrsMain.jpg')
    plt.figure(figsize=(15,12))
    wordCloud(orgImg,bwImg,text_Party,maxWord=3000,colorGener=True)
    
    plt.tight_layout()
    buf = BytesIO()
    plt.savefig(buf)
    buf.seek(0)
    img2 = Image.open(buf)
    plt.clf() 
    return img2
    
  
  elif 'aap' in parsed:
    orgImg=Original_Image('AAPMain.jpg')
    bwImg=Image_Processed('AAPMain.jpg')
    plt.figure(figsize=(15,12))
    wordCloud(orgImg,bwImg,text_Party,maxWord=3000,colorGener=False,contCol='black')
    
    plt.tight_layout()
    buf = BytesIO()
    plt.savefig(buf)
    buf.seek(0)
    img3 = Image.open(buf)
    plt.clf() 
    return img3
  
  else :
    wordcloud = WordCloud(max_words=2000, background_color="white",mode="RGB").generate(text_Party)
    plt.figure(figsize=(15,12))
    plt.imshow(wordcloud, interpolation="bilinear")
    plt.axis("off")   
    plt.tight_layout()
    buf = BytesIO()
    plt.savefig(buf)
    buf.seek(0)
    img4 = Image.open(buf)
    plt.clf()
    return img4



'''
url = "http://library.bjp.org/jspui/bitstream/123456789/2988/1/BJP-Election-english-2019.pdf"
path_input = "./Bjp_Manifesto_2019.pdf"
urllib.request.urlretrieve(url, filename=path_input)

url="https://drive.google.com/uc?id=1BLCiy_BWilfVdrUH8kbO-44DJevwO5CG&export=download"
path_input = "./Aap_Manifesto_2019.pdf"
urllib.request.urlretrieve(url, filename=path_input)

url="https://drive.google.com/uc?id=1HVZvTtYntl0YKLnE0cwu0CvAIRhXOv60&export=download"
path_input = "./Congress_Manifesto_2019.pdf"
urllib.request.urlretrieve(url, filename=path_input)
'''
def analysis(Manifesto,Search):
  raw_party = Parsing(Manifesto)
  text_Party=clean_text(raw_party)
  text_Party= Preprocess(text_Party)

  df = pd.DataFrame(raw_party.split('\n'), columns=['Content'])
  df['Subjectivity'] = df['Content'].apply(getSubjectivity)
  df['Polarity'] = df['Content'].apply(getPolarity)
  df['Analysis on Polarity'] = df['Polarity'].apply(getAnalysis)
  df['Analysis on Subjectivity'] = df['Subjectivity'].apply(getAnalysis)
  plt.title('Sentiment Analysis')
  plt.xlabel('Sentiment')
  plt.ylabel('Counts')
  plt.figure(figsize=(4,3))
  df['Analysis on Polarity'].value_counts().plot(kind ='bar',color="#FF9F45")
  plt.tight_layout()
  buf = BytesIO()
  plt.savefig(buf)
  buf.seek(0)
  img1 = Image.open(buf)
  plt.clf() 
  
  plt.figure(figsize=(4,3))
  df['Analysis on Subjectivity'].value_counts().plot(kind ='bar',color="#B667F1")
  plt.tight_layout()
  buf = BytesIO()
  plt.savefig(buf)
  buf.seek(0)
  img2 = Image.open(buf)
  plt.clf()
  
  img3 = word_cloud_generator(Manifesto.name,text_Party)
  
  fdist_Party=fDistance(text_Party)
  img4=fDistancePlot(text_Party)
  img5=DispersionPlot(text_Party)
  
  searchRes=concordance(text_Party,Search)
  searChRes=clean(searchRes)
  searChRes=searchRes.replace(Search,"\u0332".join(Search))
  return searChRes,fdist_Party,img1,img2,img3,img4,img5

  
Search_txt=gr.inputs.Textbox()   
filePdf = gr.inputs.File()
text = gr.outputs.Textbox(label='SEARCHED OUTPUT')
mfw=gr.outputs.Label(label="Most Relevant Topics")
plot1=gr.outputs. Image(label='Sentiment Analysis')
plot2=gr.outputs.Image(label='Subjectivity Analysis')
plot3=gr.outputs.Image(label='Word Cloud')
plot4=gr.outputs.Image(label='Frequency Distribution')
plot5=gr.outputs.Image(label='Dispersion Plot')

io=gr.Interface(fn=analysis, inputs=[filePdf,Search_txt], outputs=[text,mfw,plot1,plot2,plot3,plot4,plot5], title='Manifesto Analysis',description='Aim- To understand and interpret the official manifestos of political parties published on their websites.\nThe analysis would bring clarity of ideas for the general public and precise issues taken or would be taken care  by the political parties.',examples=[['manifestos/Bjp_Manifesto_2019.pdf','modi'],['manifestos/AAP_Manifesto_2019.pdf','delhi'],['manifestos/Congress_Manifesto_2019.pdf','safety']])
io.launch(debug=True,share=False)
#,examples=[['./Bjp_Manifesto_2019.pdf','india'],['./AAP_Manifesto_2019.pdf',],['./Congress_Manifesto_2019.pdf',]]
#allow_screenshot=False,    allow_flagging="never",

#examples=[['manifestos/Bjp_Manifesto_2019.pdf','modi'],['AAP_Manifesto_2019.pdf','delhi'],['manifestos/Congress_Manifesto_2019.pdf','safety']])