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With the appropriate function identified, you were to amend the code to control how often the
request for the web page is sent to the server. The Beans’R’Us webmaster has been in touch
to say that their web-based pricing information is updated every 15 minutes.You were to fill in
the blanks in the code as indicated by the dashed lines.
Hints: 15 minutes equates to 15 multiplied by 60 seconds, which is 900 seconds. Also: to use
the functionality provided by a library, remember to import it first.

Import the library at the top
of the program. This gives the
program access to all the built-in
functionality that the library
provides.

import urllib.request
import time

Use the facilities of the time
price = 99.99
library to pause the program for
while price > 4.74: 15 minutes between requests.
time.sleep(900)

page = urllib.request.urlopen("http://www.beans-r-us.biz/prices.html")
text = page.read().decode("utf8")

where = text.find('>$')
start_of_price = where + 2
end_of_price = start_of_price + 4
price = float(text[start_of_price:end_of_price])

print ("Buy!")

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