pbc.py

import requests
import uuid
import time
import urllib.request
from lxml import etree
from googletrans import Translator
from transformers import pipeline
from PyPDF2 import PdfReader
analyzer = pipeline("sentiment-analysis", model="ProsusAI/finbert")

translator = Translator()

def datemodifier(date_string):
    """Date Modifier Function"""
    try:
        to_date = time.strptime(date_string,"%Y-%m-%d %H:%M:%S")
        return time.strftime("%Y-%m-%d",to_date)
    except:
        return False

def fetch_url(url):
    response = requests.get(url)
    if response.status_code == 200:
        return response.text
    else:
        return None

def translist(infolist):
    """Translist Function"""
    out = list(filter(lambda s: s and
                      (isinstance (s,str) or len(s.strip()) > 0), [i.strip() for i in infolist]))
    return out

def encode(content):
    """Encode Function"""
    text = ''
    for element in content[:1]:
        if isinstance(element, etree._Element):
            subelement = etree.tostring(element).decode()
            subpage = etree.HTML(subelement)
            tree = subpage.xpath('//text()')
            line = ''.join(translist(tree)).\
                replace('\n','').replace('\t','').replace('\r','').replace('  ','').strip()
        else:
            line = element
        text += line
        index = text.find('打印本页')
        if index != -1:
          text = text[:index]
        
    return text

def extract_from_pdf(url):
    # Send a GET request to the URL and retrieve the PDF content
    response = requests.get(url)
    pdf_content = response.content

    # Save the PDF content to a local file
    with open("downloaded_file.pdf", "wb") as f:
        f.write(pdf_content)

    # Open the downloaded PDF file and extract the text
    with open("downloaded_file.pdf", "rb") as f:
        pdf_reader = PdfReader(f)
        num_pages = len(pdf_reader.pages)
        extracted_text = ""
        extracted_text_eng = ""
        for page in range(num_pages):
            text = pdf_reader.pages[page].extract_text()
            if text and text[0].isdigit():
                text = text[1:]
            first_newline_index = text.find('\n')
            text = text[:first_newline_index+1].replace('\n', ' ') + text[first_newline_index+1:].replace('\n', '')
            extracted_text_eng += translator.translate(text, dest='en').text
            extracted_text += text
    return extracted_text, extracted_text_eng

"""Upload file to dynamoDB"""
# import datetime
from datetime import datetime, timedelta
from decimal import Decimal
import boto3

AWS_ACCESS_KEY_ID = "AKIAQFXZMGHQYXKWUDWR"
AWS_SECRET_ACCESS_KEY = "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"

def get_db_connection():
    """Get dynamoDB connection"""
    dynamodb = boto3.resource(
    service_name='dynamodb',
    region_name='us-east-1',
    aws_access_key_id=AWS_ACCESS_KEY_ID,
    aws_secret_access_key=AWS_SECRET_ACCESS_KEY
    )
    return dynamodb

def upsert_content(report):
    """Upsert the content records"""
    dynamodb = get_db_connection()
    table = dynamodb.Table('article_china')
        # Define the item data
    item = {
        'id': str(report['id']),
        'site': report['site'],
        'title': report['title'],
        # 'originalSite': report['originalSite'],
        # 'originalTitle': report['originalTitle'],
        # 'originalContent': report['originalContent'],
        'category': report['category'],
        # 'author': report['author'],
        'content': report['content'],
        'publishDate': report['publishDate'],
        'link': report['url'],
        # 'attachment': report['reporturl'],
        # 'authorID': str(report['authorid']),
        'sentimentScore': str(Decimal(report['sentimentScore']).quantize(Decimal('0.01'))),
        'sentimentLabel': report['sentimentLabel'],
        'LastModifiedDate': datetime.now().strftime("%Y-%m-%dT%H:%M:%S")
    }
    response = table.put_item(Item=item)
    print(response)

i = 0
while i > -1:
    if i == 0:
        categoryu_url = "http://www.pbc.gov.cn/rmyh/3963412/3963426/index.html"
    else:
        j = i + 1
        categoryu_url = f"http://www.pbc.gov.cn/rmyh/3963412/3963426/index_{j}.html"
    i = i + 1
    response = requests.get(categoryu_url)
    page = etree.HTML(response.text)
    urls = page.xpath("//td[contains(@height,'22')]//a[contains(@target, '_blank')]/@href")
    urls = [item for item in urls if item.startswith("/rmyh/")]
    for url in urls:
        try:
            url = "http://www.pbc.gov.cn" + url
            article = {}
            response = requests.get(url)
            response.encoding = 'utf-8'
            page = etree.HTML(response.text)
            article['originalContent'] = encode(page.xpath("//div[@class='mainw950']//td[@class='content']/font[@class='zoom1']//p"))
            content_eng = ''
            for element in article['originalContent'].split("。"):
              content_eng += translator.translate(element, dest='en').text + ' '
            article['content'] = content_eng
            article['site'] = "The People's Bank of China"
            article['originalSite'] = "中国人民银行"
            article['originalTitle'] = page.xpath("//title/text()")[0]
            article['title'] = translator.translate(article['originalTitle'], dest='en').text
            article['url'] = url
            article['category']= "Policy Interpretation"
            article['publishDate'] = datemodifier(page.xpath("//meta[@name = '页面生成时间']/@content")[0])
            parsed_datetime = datetime.strptime(time.strftime("%Y-%m-%d", time.strptime(article['publishDate'],"%Y-%m-%d")), "%Y-%m-%d")
            if parsed_datetime < (datetime.today() - timedelta(days=183)):
                i = -1
            else:
                article['id'] = uuid.uuid5(uuid.NAMESPACE_OID, article['title']+article['publishDate'])
                label_dict = {
                    "positive": "+",
                    "negative": "-",
                    "neutral": "0",
                }
                sentiment_score = 0
                maximum_value = 0
                raw_sentiment = analyzer(article['content'][:512], return_all_scores=True)
                sentiment_label = None
                for sentiment_dict in raw_sentiment[0]:
                    value = sentiment_dict["score"]
                    if value > maximum_value:
                        sentiment_label = sentiment_dict["label"]
                        maximum_value = value
                    if sentiment_dict["label"] == "positive":
                        sentiment_score = sentiment_score + value
                    if sentiment_dict["label"] == "negative":
                        sentiment_score = sentiment_score - value
                    else:
                        sentiment_score = sentiment_score + 0
                article['sentimentScore'] = sentiment_score
                article['sentimentLabel'] = label_dict[sentiment_label]
                upsert_content(article)
        except Exception as error:
            print(error)