syntax-error

I am making a tic-tac-toe program in python. I have two questions: How to create a trick to terminate the move() when we have created a diagonal or a line(xxx or OOO) in the game. In my program some error is occurring::in line 28::(UnboundLocalError: local variable 'stop' referenced before assignment) My code is:: import random board = {"top-l":" ","top-m":" ","top-r":" ","mid-l":" ","mid-m":" ","mid-r":" ","low-l":" ","low-m":" ","low-r":" "} def print_board(board): print( board["top-l"] + "|" + board["top-m"] + "|" + board["top-r"]) print("--------") print( board["mid-l"] + "|" + board["mid

I tried to run this example from the docs in the Jython interpreter: http://www.jython.org/docs/library/functions.html class C(object): def __init__(self): self._x = None @property def x(self): """I'm the 'x' property.""" return self._x @x.setter def x(self, value): self._x = value @x.deleter def x(self): del self._x Just entering the first 4 lines (up to and including @property ) yields a SyntaxError: >>> class C(object): ... def __init__(self): ... self._x = None ... @property File "<stdin>", line 4 @property ^ SyntaxError: mismatched input '' expecting CLASS Update: I am on Jython 2.5.2

This question already has answers here : What do numbers starting with 0 mean in python? (9 answers) Closed 6 years ago . Python seems to be able to accept leading zeros for any number except 08 or 09. For instance, a = 04 works in the interpreter but a = 08 returns SyntaxError: invalid token I'm using python 2.7.3 on OSX, and others have been able to duplicate the error. What gives? Numbers with a leading zero in them are interpreted as octal, where the digits 8 and 9 don't exist. It's worse in Python 3, leading zeros are a syntax error no matter which digits you use. See What’s New In Python

I'm trying to find all the primes less than some integer n as concisely as possible, using list comprehensions. I'm learning Haskell, and this is just an exercise. I'd like to write something like: isqrt :: Integral a => a -> a isqrt = floor . sqrt . fromIntegral primes :: Integral a => a -> [a] primes n = [i | i <- [1,3..n], mod i k /= 0 | k <- primes (isqrt i)] which of course doesn't work. Is there a way to have a list comprehension inside a list comprehension? Here is the error I'm getting: exercise-99-1.hs:138:39: Not in scope: `k' exercise-99-1.hs:138:46: Illegal parallel list

public static int biggestArrayGap(int []a, int n) { int biggestGap = Math.abs(a[1]-a[0]); for (int i=1; i<n-1; i++) { if (Math.abs(a[i]-a[i-1]) > biggestGap) Math.abs(a[i]-a[i-1]) = biggestGap; } return biggestGap; } For some reason, the second line in the if statement is returning as unexpected type– required: variable found: value. I tried == and that obviously didn't work. Any insight? You switched the operands in your assign statement. Switch this Math.abs(a[i]-a[i-1]) = biggestGap; to this biggestGap = Math.abs(a[i]-a[i-1]); Math.abs(a[i]-a[i-1]) returns just an int value (no variable