pythonで株価取得してみた

import sys
from yahoo_finance_api2 import share
from yahoo_finance_api2.exceptions import YahooFinanceError
from pandas_datareader import data
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np

def company_stock(period_type, period, company_code):
    my_share = share.Share(company_code)
    symbol_data = None

    try:
        symbol_data = my_share.get_historical(share.PERIOD_TYPE_DAY,
                                            period_type,
                                            share.FREQUENCY_TYPE_MINUTE,
                                            period)
    except YahooFinanceError as e:
        print(e.message)
        sys.exit(1)

    from datetime import datetime, timezone, timedelta

    date = symbol_data["timestamp"]

    old_date = date[0]
    now_date = date[len(date) - 1]

    old_time = datetime.fromtimestamp(old_date/1000)
    now_time = datetime.fromtimestamp(now_date/1000)

    price = symbol_data["close"]
    old_price = price[0]
    now_price = price[len(date) - 1]
    print(str(old_time) + "の時の株価： " + str(old_price))
    print(str(now_time) + "の時の株価： " + str(now_price))

    df = pd.DataFrame(symbol_data.values(), index=symbol_data.keys()).T
    df.timestamp = pd.to_datetime(df.timestamp, unit='ms')
    df.index = pd.DatetimeIndex(df.timestamp, name='timestamp').tz_localize('UTC').tz_convert('Asia/Tokyo')

    plt.title(company_code, color='black', size=15, loc='center') # title(タイトル, 線の色, 背景色, フォントサイズ,　タイトル位置)
    plt.plot(df.index, price, label='close', color='blue')

    plt.show()

plt.figure(figsize=(10 ,5))

import time

company_stock(2, 1, '9201.T')