Problem in using Pulp

[amitsoni.1984 at gmail.com]

Thanks, now I am not getting that error, but now I am getting a
different error:
---------------------error-------------------------------
   GLPK("C:\Documents and
Settings\Amit\Desktop\glpk-4.9\glpk-4.9\examples\"").solve(prob)
  File "C:\Documents and Settings\Amit\Desktop\pulp\pulp.py", line 114,
in solve
    return lp.solve(self)
  File "C:\Documents and Settings\Amit\Desktop\pulp\pulp.py", line
1740, in solve
    status = solver.actualSolve(self)
  File "C:\Documents and Settings\Amit\Desktop\pulp\pulp.py", line 188,
in actualSolve
    raise "PuLP: cannot execute "+self.path
PuLP: cannot execute C:\Documents and
Settings\Amit\Desktop\glpk-4.9\glpk-4.9\examples"
-------------------------------------------------------------
can anyone tell me where the problem is? I am using following code.
thanks
Amit
----------------------Code----------------------
from pulp import *

prob = LpProblem("linear", LpMinimize)

# Variables
x = LpVariable("x", 0, 4)
y = LpVariable("y", -1, 1)
z = LpVariable("z", 0)

# Objective
prob += x + 4*y + 9*z

# Constraints
prob += x+y <= 5
prob += x+z >= 10
prob += -y+z == 7

GLPK("C:\Documents and
Settings\Amit\Desktop\glpk-4.9\glpk-4.9\examples\"").solve(prob)
------------------------------------------------------------------------------
Robert Kern wrote:
> amitsoni.1984 at gmail.com wrote:
> > Hi,
> > I am trying to run the following example which uses PULP for linear
> > optimization. But I am getting this error in the last line: "EOL while
> > scanning single quoted string".
>
> > GLPK("C:\Documents and
> > Settings\Amit\Desktop\glpk-4.9\glpk-4.9\examples\").solve(prob)
>
> Backslashes escape characters in strings. Specifically, when a string uses ""
> quotes as delimiters, then \" is the escape sequence for a double quote in the
> string itself. The parser sees your \" at the end as simply an escaped double
> quote and keeps interpreting the rest of the line as a string. Since the line
> ends before another, unescaped " comes along, it raises the exception that you see.
>
> http://docs.python.org/ref/strings.html
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>   that is made terrible by our own mad attempt to interpret it as though it had
>   an underlying truth."
>    -- Umberto Eco