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order matters

Code Magnets Solution

Before you amend the existing coffee bean program code, let’s see
if you can create a function to display the current bean price. You
were to rearrange the magnets in the correct order to create the
function:

You still need to import libraries
before using them in a function.

import urllib.request
You need a colon after
the function name.
The function
definition def get_price() :
starts here.

page = urllib.request.urlopen("http://www.beans-r-us.biz/prices.html")
The body of the function text = page.read().decode("utf8")
needs to be indented. where = text.find('>$')
start_of_price = where + 2
end_of_price = start_of_price + 4
The function needs
to be declared print( text[start_of_price:end_of_price] )
before it's called.
The function
get_price() definition ends here.

This line isn't indented,
because it is part of
the main program.

Always get things in the right order

When it comes to functions, the order in which you do things
really matters. The get_price() function needs to be The order in which
defined before you call it. And because the function relies upon you do things is
some code in the urllib.request library, you need to make really important.
sure that the import line appears before the function, too.
Let’s see if your new code works.

84 Chapter 3