shutil.move, permission denied, why ?

[Stéphane Ninin]

Hello world,

I am fighting with what is probably a stupid problem.

In a wxpython GUI, here is a method which must read a file,
and if the file is not correctly formed rename it and create a new file:

(I have removed most of the logic of the code here, so I am not sure
it's going to be helpful)

def makeTree(self):
print 'HERE WE ARE'
f = file(self.__fil ename,'r')
f.close()
from shutil import move
from os.path import join
bakname = self.__filename + '.bak'
print bakname
print f.closed
f.close()
print 'TEST',f.closed
move(self.__fil ename,bakname)
Here is some of the output corresponding to this method
(on cygwin/Windows 2000, with python 2.3.3):

.... in makeTree:

move(self.__fil ename,bakname)
File "e:\Program\Pyt hon\lib\shutil. py", line 171, in move
os.unlink(src)
OSError: [Errno 13] Permission denied: u'C:\\home\\nat asha\\stephane\ \PYTHON
\\Projects\\Scr ipts\\config.xm l'

python -V
Python 2.3.3

I just do not understand what could cause this "permission s denied" for this
file. Any idea of what stupid thing I could have done somewhere in the code
that could cause that ?
Thanks in advance for any suggestion...

Regards,

--
Stephane Ninin

[John J. Lee]

"Stéphane Ninin" <st*****@alussi nan.org> writes:
[...]

(I have removed most of the logic of the code here, so I am not sure
it's going to be helpful)

[...]

Post a short snippet of code that runs and demonstrates the problem.
John

[Peter Hansen]

Stéphane Ninin wrote:

I just do not understand what could cause this "permission s denied" for this
file. Any idea of what stupid thing I could have done somewhere in the code
that could cause that ?

Can you do exactly the same thing successfully from the command
line? That is, do a "move a b" with the same paths that you
are trying to use in your code?

[Josiah Carlson]

> def makeTree(self):

print 'HERE WE ARE'
f = file(self.__fil ename,'r')
f.close()
from shutil import move
from os.path import join
bakname = self.__filename + '.bak'
print bakname
print f.closed
f.close()
print 'TEST',f.closed
move(self.__fil ename,bakname)

Try... os.rename(self. __filename, bakname)

- Josiah

[Stéphane Ninin]

Also sprach Peter Hansen :

I just do not understand what could cause this "permission s denied" for
this file. Any idea of what stupid thing I could have done somewhere in
the code that could cause that ?

Can you do exactly the same thing successfully from the command
line? That is, do a "move a b" with the same paths that you
are trying to use in your code?

A short test script is working correctly, but I will try to write something
bigger and post it here later.

[Stéphane Ninin]

Also sprach John J. Lee :

(I have removed most of the logic of the code here, so I am not sure
it's going to be helpful)

[...]

Post a short snippet of code that runs and demonstrates the problem.

Ok, I have reduced it, but I am afraid problem comes from PyXML...

You must have some file called "test.xml "
(file is empty in my test) in the same directory as the script:
def getFileName():
from os.path import abspath,join
from sys import path
cdir = abspath(path[0])
cfile = join(cdir,'test .xml')
return cfile

from xml.sax.saxutil s import DefaultHandler

class TestReader(obje ct):

def __init__(self):
pass

def read(self,filen ame):

from _xmlplus.sax.sa x2exts import XMLValParserFac tory
parser = XMLValParserFac tory.make_parse r()

#from xml.sax.handler import feature_namespa ces,feature_val idation
#parser.setFeat ure(feature_nam espaces, 0)

dh = DefaultHandler( )

parser.setConte ntHandler(dh)
parser.setError Handler(dh)

f = file(filename,' r')

try:
parser.parse(f)
finally:
parser.close()
parser.reset()
f.close()

return 1

def ViewFile():
from xml.sax._except ions import SAXParseExcepti on

infile = getFileName()

a = TestReader()

try:
print 'A0'
pls = a.read(infile)
except SAXParseExcepti on,e:
print 'B1'
pls = {}

from shutil import move
from os import rename

bakname = infile + '.bak'
move(infile,bak name)
#rename(infile, bakname)
def main():
ViewFile()

main()

[Stéphane Ninin]

Also sprach Josiah Carlson :

Try... os.rename(self. __filename, bakname)

Thanks for the idea, but unfortunately it doesnot change anything.

[Colin Brown]

"Stéphane Ninin" <st*****@alussi nan.org> wrote in message
news:Xn******** *************** **********@212. 27.42.68...
....

I just do not understand what could cause this "permission s denied" for this file. Any idea of what stupid thing I could have done somewhere in the code that could cause that ? .... Stephane Ninin

Hi Stéphane

Some time ago I had a "permission denied" problem on Windows that I finally
tracked down to os.system duplicating open handles at the creation instance!
The method I used to locate the problem area was by having python fire off
an instance of handle.exe (freely available from www.sysinternals.com) when
the permission error occurred to see what else had the file open.

Colin Brown
PyNZ