Selenium script to get ETF consittuents

selenium.py

import pandas as pd
'''
brew install phantomjs
or
brew tap homebrew/cask
brew cask install chromedriver
'''
# from selenium import webdriver
from selenium.webdriver.chrome.webdriver import WebDriver

def get_etf_holdings(etf_symbol):
    '''
    etf_symbol: str
    
    return: pd.DataFrame
    '''
    url = 'https://www.barchart.com/stocks/quotes/{}/constituents?page=all'.format(
        etf_symbol)

    # Loads the ETF constituents page and reads the holdings table
    browser = WebDriver() # webdriver.PhantomJS()
    browser.get(url)
    html = browser.page_source
    soup = BeautifulSoup(html, 'html')
    table = get_table(soup)

    # Reads the holdings table line by line and appends each asset to a
    # dictionary along with the holdings percentage
    asset_dict = {}
    for row in table.select('tr')[1:-1]:
        try:
            cells = row.select('td')
            # print(row)
            symbol = cells[0].get_text().strip()
            # print(symbol)
            name = cells[1].text.strip()
            celltext = cells[2].get_text().strip()
            percent = float(celltext.rstrip('%'))
            shares = int(cells[3].text.strip().replace(',', ''))
            if symbol != "" and percent != 0.0:
                asset_dict[symbol] = {
                    'name': name,
                    'percent': percent,
                    'shares': shares,
                }
        except BaseException as ex:
            print(ex)
    browser.quit()
    return pd.DataFrame(asset_dict)

I am unable to use this, and the problem seems to be with get_table. Where is that defined?