Date: Tue, 22 Sep 2009 05:13:32 -0700 (PDT)
From: Ali Sina <seena_...@yahoo.com>
To: tutor@python.org
Subject: [Tutor] Challenge
Message-ID: <826729.63168...@web45911.mail.sp1.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"
Hello tutor
I downloaded a guide about learning Python by Michael Dawson which has
challenges at the end of each chapter. I'm a novice so I encountered a problem
with this challenge:
"Write a program that flips a coin 100 times and then tells
you the number of heads and tails."
I wrote this code but I know its wrong. Although it works properly:
flips=0
h='heads'
t='tails'
while True:
??? flips+=1
??? if flips>100:
??????? break
??? if True:
??????? print(flips,'=',h or t)
But it prints every number with the string 'heads'. I'm really blank at this.
It may have something to do with the 'random' module.
Regards
You could use a dictionary to store the outcome and a list with the
possible outcomes, then use random.choice to pick an outcome.
Here is my try at it:
In [18]: from random import choice
In [19]: pos = ('head', 'tail')
In [20]: outcomes = {'head':0, 'tail':0}
In [21]: for i in range(100):
....: outcomes[choice(pos)] += 1
....:
....:
In [22]: print outcomes
-------> print(outcomes)
{'head': 46, 'tail': 54}
HTH
Daniel Sarmiento.
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