Add main with basic market plot

main.py

+import yfinance as yf
+import matplotlib.pyplot as plt
+
+msft = yf.Ticker("MSFT")
+print(msft)
+"""
+returns
+<yfinance.Ticker object at 0x1a1715e898>
+"""
+
+# get stock info
+print(msft.info)
+
+"""
+returns:
+{
+ 'quoteType': 'EQUITY',
+ 'quoteSourceName': 'Nasdaq Real Time Price',
+ 'currency': 'USD',
+ 'shortName': 'Microsoft Corporation',
+ 'exchangeTimezoneName': 'America/New_York',
+  ...
+ 'symbol': 'MSFT'
+}
+"""
+
+# get historical market data, here max is 5 years.
+print(msft.history(period="max"))
+msft.history(period="max").plot()
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