text: #!/bin/python
  
  import os
  import requests
  from bs4 import BeautifulSoup
  
  
  def build_url(account, testnet):
      hostname = 'etherscan.io'
      if testnet:
          hostname = 'ropsten.' + hostname
      url = 'https://%s/address/%s' % (hostname, account)
      return url
  
  
  def parse_balance(url):
      html = requests.get(url, headers={'User-agent': 'Mozilla/5.0'}).text
      soup = BeautifulSoup(html, "html.parser")
  
      table = soup.find("div", {"class": "card-body"})
      value = table.find("div", {"class": "col-md-8"}).text
      return value
  
  
  def getBalance(address):
      testnet = False
      if 'testnet' == os.getenv('GET_ETH_BALANCE_CHAIN'):
          testnet = True
  
      if not address:
          return "No address specified"
      else:
          return "Address: " + address + "\n" + parse_balance(build_url(address, testnet))
  