Get Major Index Components

Get major index component data from wikipedia with these 3 simple functions:

import pandas as pd

def get_sp500_components():
    table = pd.read_html('https://en.wikipedia.org/wiki/List_of_S%26P_500_companies')
    data = table[0]
    return data

def get_nasdaq100_components():
    table = pd.read_html('https://en.wikipedia.org/wiki/Nasdaq-100#Components')
    df = table[3]
    return df

def get_dow30_components():
    table = pd.read_html('https://en.wikipedia.org/wiki/Dow_Jones_Industrial_Average#Components')
    df = table[1]
    return df