.change field is wrong for some symbols when running after hours

[Beliavsky]

The .change field is wrong for some symbols when running the program after hours, returning the last stock price. For example, on Sunday evening, running

from datetime import datetime
from wallstreet import Stock, Call, Put

print("time:", datetime.now().strftime("%A, %Y-%m-%d %H:%M:%S"))
for symbol in ["SPY", "AAPL"]:
    s = Stock(symbol)
    print("\nsymbol:", symbol)
    print("s.price:", s.price)
    print("s.change:", s.change)
    print("s.last_trade:", s.last_trade)

gave

time: Sunday, 2025-01-26 19:38:53

symbol: SPY
s.price: 607.97
s.change: -1.7800293
s.last_trade: 24 Jan 2025 21:00:00

symbol: AAPL
s.price: 222.78
s.change: 222.78
s.last_trade: 24 Jan 2025 21:00:01