[Tutor] paper scissors
bgailer at gmail.com
Fri Sep 23 21:02:44 CEST 2011
On 9/23/2011 2:04 PM, Joseph Shakespeare wrote:
> Wow, thanks so much! This is amazing!
> One question though. I understand everything in the program except
> these 2 lines:
> Wins: %s
> Loses:%s""" % (wins,loses)
> There are 2 things I don't understand.
> 1. the %s
> 2. the (wins,loses)
> Any explanation you have would be helpful.
> Thanks for taking the time to help the newbie!
> On Thu, Sep 22, 2011 at 6:35 PM, bob gailer <bgailer at gmail.com
> <mailto:bgailer at gmail.com>> wrote:
> On 9/22/2011 1:04 PM, Joseph Shakespeare wrote:
> Hi - please use a meaningful subject line - I've changed it this time
> I am new Python (about 2 weeks) and need some help. I am
> making a rock paper scissors game that a user can play with
> the computer by using a while loop and if elif else
> statements. It needs to keep score of the amount of losses and
> wins, and give the user the option to play again after each
> round. I've tried so many different options and I don't know
> what else to try. My problem is making the program loop back
> around when the user selects y(yes) to play again and defining
> the variables at the beginning. Here's my program:
> I've taken the liberty to extensively edit (and simplify) your
> program. Cut 60 lines to 34. Study it - there are a lot of useful
> ideas in it. Feel free to ask questions.
> The following 3 llnes will NOT get you what you want. You appear
> to be confusing variable names with strings.
> while play==y:
> The while condition is not true - the program will not run.
> The proper initialization is:
> play = "y"
> However I've eliminated the need for even that.
> import random
> # Use a triple-quoted string rather than a bunch of print statements.
> print """Welcome to Rock,Paper, Scissors! This is a game of chance.
> The computer randomly picks one of three throws.
> Rock beats Scissors, but is beaten by Paper.
> Scissors beat Paper, but are beaten by Rock.
> Paper beats Rock, but is beaten by Scissors.
> You enter:
> r for Rock
> s for Scissors
> p for Paper
> q to Quit'"""
> wins = loses = 0
> while True: # "endless" loop - exited by break statement
> player = raw_input("Please pick your throw: (r, s, p, or q ):")
> if player == "q":
> break # exits the loop
> elif player not in "rps": # check for valid entry
> print "Invalid entry"
> computer= random.choice("rsp") # no need for a list - a
> string is a sequence
> print "Computer throw:", computer
> if player == computer: # testing various conditiions cam be
> greatly simplified
> print "Tie! Throw again."
> elif player + computer in ["rs", "sp", "pr"]:
> print "You win! " + player + " beats " + computer
> wins += 1 # simpler than wins = wins + 1
> print "You lose! " + computer + " beats " + player
> loses +=1
> print """Game Summary
> Wins: %s
> Loses:" %s""" % (wins,loses) # using % formatting and triple
> quoted string
> print"Thanks for playing!"
> -- Bob Gailer 919-636-4239 <tel:919-636-4239> Chapel Hill NC
Chapel Hill NC
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