Problem with pythonpath? "python2.5: cannot open file 'dev_appserver.py': [Errno 2] There is no such file or directory"

Question

I added this line to my .bashrc (Ubuntu 9.10):

export PYTHONPATH=/opt/google_appengine/

And then I ran dev_appserver via python2.5 on Ubuntu as follows:

$ python2.5 dev_appserver.py guestbook/
python2.5: can't open file 'dev_appserver.py': [Errno 2] No such file or directory

As you can see, it cannot be found dev_appserver.py, even if it is in my directory /opt/google_appengine/. To make sure this is not a problem, I did this:

sudo chmod a+rwx dev_appserver.py

To check if it was added to the system path for python2.5, I did the following:

$ python2.5
Python 2.5.5 (r255:77872, Apr 29 2010, 23:59:20) 
[GCC 4.4.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> for line in sys.path: print line
... 

/usr/local/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg
/opt/google_appengine/demos
/opt/google_appengine
/usr/local/lib/python25.zip
...

The directory appears in this list, so I don’t understand why it cannot be found when entering:

$ python2.5 dev_appserver.py guestbook/

I am new to Python, so I would appreciate any help. Thank.

Answer 1

Python PYTHONPATH script . dev_appserver.py, dev_appserver.py( ), "#!/usr/bin/env python2.5".

Answer 2

$ python2.5 dev_appserver.py guestbook/

, python2.5, CURRENT_PATH/dev_appserver.py.

$ python /opt/google_appengine/dev_appserver.py guestbook/

$ dev_appserver.py guestbook/

dev_appserver.py shebang Python, , #!/usr/bin/env python2.5 #!/usr/bin/env python.

, python, python, .