old_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
  	Dump flask-based http proxy.
  	Get habrahabr link and return html content with ™ symbol added to every
  	six letters word.
  	Version 0.1
  	Usage: type in cli 
  	$python3 proxy.py
  	and open link http://127.0.0.1:5000/post/320476/
  """
  
  import requests
  import string
  import os
  
  from flask import Flask, Response
  from flask import stream_with_context, send_from_directory
  
  from bs4 import BeautifulSoup
  
  site_name = 'http://habrahabr.ru/'
  
  app = Flask(__name__)
  
  
  def is_in(s):
  	"""Return 1 if the string contains at least one punctuation symbol"""
  	is_p = 0
  	for i in s:
  		if i in string.punctuation:
  			is_p = 1
  			break
  	return is_p
  
  
  @app.route('/favicon.ico')
  def favicon():
  	"""Favicon request handler"""
  	return send_from_directory(
  		os.path.join(app.root_path, 'static'),
  		'favicon.ico', mimetype='image/favicon.ico')
  
  
  @app.route('/<path:url>')
  def home(url):
  	req = requests.get(site_name + url, stream=True)
  	soup = BeautifulSoup(req.text, 'lxml')
  	post_content = soup.find('div', {'class': 'content html_format'})
  	pc = post_content.get_text()
  	plist = pc.split()
  	print('Plist len', len(plist))
  
  	for i in range(len(plist)):
  			if len(plist[i]) == 6:
  					if is_in(plist[i]) == 0:
  						x = list(plist[i])
  						x.append(u'\u2122')
  						x = ''.join(x)
  						plist[i] = x
  
  	content_out = ' '.join(plist)
  
  	return content_out
  
  if __name__ == '__main__':
  	app.run(debug=True)
  
new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
      Dump flask-based http proxy.
      Get habrahabr link and return html content with ™ symbol added to every
      six letters word.
      Version 0.1
      Usage: type in cli
      $python3 proxy.py
      and open link http://127.0.0.1:5000/post/320476/
  """
  
  import requests
  import string
  import os
  
  from flask import Flask, send_from_directory
  
  from bs4 import BeautifulSoup
  
  site_name = 'http://habrahabr.ru/'
  
  app = Flask(__name__)
  
  
  def is_punct(s):
      """Return 1 if the string contains at least one punctuation symbol"""
      is_p = 0
      for i in s:
          if i in string.punctuation:
              is_p = 1
              break
      return is_p
  
  
  @app.route('/favicon.ico')
  def favicon():
      """Favicon request handler"""
      return send_from_directory(
          os.path.join(app.root_path, 'static'),
          'favicon.ico', mimetype='image/favicon.ico')
  
  
  @app.route('/<path:url>')
  def home(url):
      req = requests.get(site_name + url, stream=True)
      soup = BeautifulSoup(req.text, 'lxml')
      post_content = soup.find('div', {'class': 'content html_format'})
      post_content_text = post_content.get_text()
      post_content_list = post_content_text.split()
  
      for i in range(len(post_content_list)):
              if len(post_content_list[i]) == 6:
                      if is_punct(post_content_list[i]) == 0:
                          x = list(post_content_list[i])
                          x.append(u'\u2122')
                          x = ''.join(x)
                          post_content_list[i] = x
  
      content_out = ' '.join(post_content_list)
  
      return content_out
  
  
  if __name__ == '__main__':
      app.run(debug=True)
  
subject: Fix code according to Flake8 requirements