Coordinate Grid Points

[Eric.Gabrielson@gmail.com]

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://

https://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

[James Stroud]

Re: Coordinate Grid Points

Eric.Gabrielson @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://

https://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

[James Stroud]

Re: Coordinate Grid Points

Eric.Gabrielson @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://

https://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 the game described, the input is of the form "20 20", so (1) eval
won't work and (2) regex is not needed. So you should use a healthy
combo of map(), inpt.split(), int(), and inpt.strip() (assuming inpt is
the string input). But not necessarily in the order listed.

[Eric.Gabrielson@gmail.com]

Re: Coordinate Grid Points

On Feb 5, 3:29 pm, James Stroud <jstr...@mbi.uc la.eduwrote:

Eric.Gabriel... @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://

https://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

[James Stroud]

Re: Coordinate Grid Points

Eric.Gabrielson @gmail.com wrote:

On Feb 5, 3:29 pm, James Stroud <jstr...@mbi.uc la.eduwrote:
>

>>Eric.Gabriel. ..@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://
>>>https://www.cs.washington.edu/educat...07wi/homework/
>>>homework.htm l 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

[Eric.Gabrielson@gmail.com]

Re: Coordinate Grid Points

On Feb 5, 6:33 pm, James Stroud <jstr...@mbi.uc la.eduwrote:

Eric.Gabriel... @gmail.com wrote:

On Feb 5, 3:29 pm, James Stroud <jstr...@mbi.uc la.eduwrote:

>

>Eric.Gabriel.. .@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://
>>https://www.cs.washington.edu/educat...07wi/homework/
>>homework.ht ml 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.ra ndint(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.ra ndint(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
*************** *************** *************** *************** *************** *************** *************** ***************

[greg]

Re: Coordinate Grid Points

Eric.Gabrielson @gmail.com wrote:

class Point(object):
def _init_(self, x, y):

The name of the __init__ method needs *two* underscores
at each end, i.e.

def __init__(self, x, y):

--
Greg

[Gabriel Genellina]

Re: Coordinate Grid Points

En Tue, 06 Feb 2007 20:35:43 -0300, <Eric.Gabrielso n@gmail.comescr ibió:

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

class Point(object):
def _init_(self, x, y):
self.x = x
self.y = y
>
#generate random coordinate point
randp = Point(random.ra ndint(1, 20), random.randint( 1, 20))

_init_ should be __init__ (two leading and trailing underscores)
That special method is used to initialize your newly constructed Point
instance.
See section 9.3.2 on the Python tutorial:

http://docs.python.org/tut/node11.html#SECTION0011320000000000000000

--
Gabriel Genellina

[Eric.Gabrielson@gmail.com]

Re: Coordinate Grid Points

On Feb 6, 4:08 pm, "Gabriel Genellina" <gagsl...@yahoo .com.arwrote:

En Tue, 06 Feb 2007 20:35:43 -0300, <Eric.Gabriel.. .@gmail.comescr ibió:
>
>
>

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

>

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

>
_init_ should be __init__ (two leading and trailing underscores)
That special method is used to initialize your newly constructed Point
instance.
See section 9.3.2 on the Python tutorial:http://docs.python.org/tut/node11.ht...00000000000000
>
--
Gabriel Genellina

WOW thank you so much I feel like a blind idiot *slaps self on
forehead*

[Matimus]

Re: Coordinate Grid Points

#classify "Point"
class Point(object):
def _init_(self, x, y):  <--- This is your problem
self.x = x
self.y = y

That should be '__init__'. Two underscores before and after. But,
IMHO, I don't think a class is really necessary unless you are going
to build in compare facilities. You might as well just use a tuple:

from random import randint
pt = (randint(1,20),randint(1,20))
....
x,y = pt
x = pt[0]
y = pt[1]