The following is the current version of the price method in the Stock class:
def price(self):
try:
return self.history[-1].value
except IndexError:
return NoneNow, in the docstring, we add an example of how this method might be used. The examples are basically a copy-paste of a Python interactive shell. Hence, the lines containing input to be executed are prefixed with >>> prompt, and the lines without the prompt indicate output, as shown in the following:
def price(self):
"""Returns the current price of the Stock
>>> from datetime import datetime
>>> stock = Stock("GOOG")
>>> stock.update(datetime(2011, 10, 3), 10)
>>> stock.price
10
"""
try:
return self.history[-1].value
except IndexError:
return NoneNow that we have the docstring, we need a way to execute it. Add the following lines...