Numpy python no attribute 'open'

opening_quotes = np.array([quote.open for quote in quotes]).astype(np.float)

import pandas_datareader as pdr
from datetime import datetime
from pandas_datareader import data
import json
import numpy as np
import pandas_datareader as pdr
import pandas as pd
 
 
input_file = 'company.json'
with open(input_file, 'r') as f:
    company_symbols_map = json.loads(f.read())
    symbols, names = np.array(list(company_symbols_map.items())).T
    for symbol in symbols:
        #print(symbols)
        quotes = pdr.get_data_yahoo(symbol,start=datetime(1971, 1, 1),end=datetime(2020, 1, 1))
        #print(quotes)
        with open('quotes_data.csv' , 'a',newline='') as  file:
            #print(quotes['symbol','start','end','High','Low','Open','Close','Volume','Adj Close'])
            quotes.to_csv(file,header=True,index=False, sep = '\t')
        #print(quotes)
        #quotes.to_csv('quotes_data.csv')
         
quotes = pd.read_csv('quotes_data.csv', sep = '\t' )
print (quotes)
# Extract opening and closing quotes
#opening_quotes = np.array([data.open for data in data]).astype(np.float)
#closing_quotes = np.array([quote.close for quote in quotes]).astype(np.float)