Coordinate Grid Points

[Eric.Gabrielson at gmail.com]

On Feb 5, 6:33 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Eric.Gabriel... at gmail.com wrote:
> > On Feb 5, 3:29 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
>
> >>Eric.Gabriel... at gmail.com wrote:
>
> >>>Hello,
> >>>       I am very knew to python and am attempting to write a program
> >>>in python that a friend of mine is having to write in java. I am doing
> >>>this for fun and would like some help as to how i can generate random
> >>>coordinate points (x,y) and compare them with user inputted coordinate
> >>>points. For example how will I be able to access the separate values,
> >>>the x from the x,y position. I think I understand everything except
> >>>1)the random coordinate points 2) the getting the users inputted x and
> >>>y values in one line ("Please guess a coordinate point from (1,1) to
> >>>(20,20): ") as opposed to  ("Please enter an x value:" and "Please
> >>>enter a y value") and finally 3) acessing the x value from the x,y
> >>>coordinate function. the assignment description is located here http://
> >>>www.cs.washington.edu/education/courses/142/07wi/homework/
> >>>homework.html if you would like to see a more in depth discription of
> >>>the game.
>
> >>>Many Thanks,
> >>>Eric
>
> >>For 1: see the random module (e.g. random.randint)
> >>For 2: see the "eval" function and "raw input"
> >>For 2 (without cheating): see the re module. For example:
> >>*****************************************************************************
> >> ***map(int, re.compile("\(?(\d+),(\d+)\)?").search(inpt).groups())****
> >>*****************************************************************************
> >>(Giving you the latter because eval will do this for you anyway.)
>
> >>Also see "raw_input".
>
> >>James
>
> > Thank you very much for your response i will play around with the code
> > when I have some time ( hopefully later tonight) but could you please
> > breakdown what the part that I surrounded with asterisks, I think I
> > recognize it but don't understand it.
>
> > Eric
>
> "re" is the regular expression module for python. "re.compile()"
> compiles the regular expression into a regular expression object with
> certain attributes, one of which is "search". "search" searches a
> string, here "inpt", and this produces a "match" (actually a
> _sre.SRE_Match) object that has, as one of its attributes, a "groups()"
> method that returns matches to the grouped expressions inside the
> regular expression, i.e. expressions surrounded by un-escaped parentheses.
>
> Inside of the quotes is a regular expression string, (that, in general,
> should be preceded immediately by a lowercase r--but is not here because
> it doesn't matter in this case and I forgot to). map() maps a callable
> (here int) to the list of groups returned by groups(). Each group is a
> string matching r"\d+" which is an expression for one or more digits.
> Each group is converted into an integer and map returns a list of
> integers. I escaped the enclosing parentheses and put question marks
> (match zero or one) so that the enclosing parentheses would be optional.
> This makes all of the following evaluate to [20, 20]:
>
>       "20,20"
>       "(20,20"
>       "20,20)"
>       "(20,20)"
>
> Except for typos, the middle two would be quite uncommon for user input,
> but would match the expression. Note also, that I didn't allow for
> whitespace anywhere, which might be expected. Arbitrary whitespace is
> matched by r"\s*".
>
> James

Thank you for your help so far, it has been useful but i haven't quite
gotten time to figure it out. In the mean time i was posting in a
different forum and got given some help (to define a "point" class) I
took that advice and am now getting an error relating to it that i
have no idea how to fix and was wondering if you might be able to give
me a hand.

Anyways heres my error:
************************************************************************************************************************
***File "C:/Documents and Settings/Eric/Desktop/Python/2d guessing
game.py", line 11, in <module>***
***    randp = Point(random.randint(1, 20), random.randint(1,
20))                                                      ***
***TypeError: default __new__ takes no
parameters
***
************************************************************************************************************************
and heres my code:

************************************************************************************************************************
#Import Random Module
import random

#classify "Point"
class Point(object):
	def _init_(self, x, y):
		self.x = x
		self.y = y

#generate random coordinate point
randp = Point(random.randint(1, 20), random.randint(1, 20))

#print randp

#get user input
x = int(raw_input("Enter guessed x value (1-20): "))
y = int(raw_input("Enter guessed y value (1-20): "))

#compare input to randomly generated point
attempts = 0

while True:
	userp = Point(x, y)
	attempts += 1

        if userp.y == randp.y and userp.x == randp.x:
		print "You got it right!"
		break

	elif userp.y == randp.y:
		if userp.y > randp.x:
			print "Go west"
		elif userp.x < randp.x:
			print "Go east"
		x = int(raw_input("Enter new x guess: "))
		userp = Point(x, y)

	elif userp.y < randp.y:
		if userp.x > randp.x:
			print "Go northwest"
		elif userp.x < randp.x:
			print "Go northeast"
		x = int(raw_input("Enter new x guess: "))
		y = int(raw_input("Enter new y guess: "))
		userp = Point(x, y)

	elif userp.x == randp.x:
		if userp.y > randp.y:
			print "Go south"
		elif userp.y < randp.y:
			print "Go north"
		y = int(raw_input("Enter new y guess: "))
		userp = Point(x, y)

print " "
print "Number of guesses", attempts
************************************************************************************************************************