473,390 Members | 1,538 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,390 software developers and data experts.

python 2.5 - f=open('a_file.txt','w') gives [Errno 2]

Hi,

I upgraded my system from tiger to leopard. With leopard came a new
version of python 2.5

Now I trying to run some python code that previously worked on tiger
(which included an older version of python).

This is the error I'm receiving :

Traceback (most recent call last):
File "test.py", line 18, in print_total
f=open('a_file.txt','w')
IOError: [Errno 2] No such file or directory: 'a_file.txt'
Is this a bug in python? This code worked on my old system
Dec 3 '07 #1
8 2703
dirkheld wrote:
Hi,

I upgraded my system from tiger to leopard. With leopard came a new
version of python 2.5

Now I trying to run some python code that previously worked on tiger
(which included an older version of python).

This is the error I'm receiving :

Traceback (most recent call last):
File "test.py", line 18, in print_total
f=open('a_file.txt','w')
IOError: [Errno 2] No such file or directory: 'a_file.txt'
Is this a bug in python? This code worked on my old system
The obvious question is: do you have 'a_file.txt' on your new system? There
are many happy python programmers on leopard, and this is one heck of a
basic functionality - I really doubt it's broken in such obvious way (if
any at all).

Diez
Dec 3 '07 #2
On Dec 3, 7:47 am, dirkheld <dirkh...@gmail.comwrote:
IOError: [Errno 2] No such file or directory: 'a_file.txt'
I sometimes see that error on Linux when trying to run a script with
DOS line endings. Is it an imported file? I don't know Macs, but start
by making sure both your script and the file have Mac line endings?

rick
Dec 3 '07 #3
On 3 dec, 14:54, "Diez B. Roggisch" <de...@nospam.web.dewrote:
dirkheld wrote:
Hi,
I upgraded my system from tiger to leopard. With leopard came a new
version of python 2.5
Now I trying to run some python code that previously worked on tiger
(which included an older version of python).
This is the error I'm receiving :
Traceback (most recent call last):
File "test.py", line 18, in print_total
f=open('a_file.txt','w')
IOError: [Errno 2] No such file or directory: 'a_file.txt'
Is this a bug in python? This code worked on my old system

The obvious question is: do you have 'a_file.txt' on your new system? There
are many happy python programmers on leopard, and this is one heck of a
basic functionality - I really doubt it's broken in such obvious way (if
any at all).

Diez
I don't have a file called 'a_file.txt'
I want to create that file and write some data to it. (http://
docs.python.org/tut/node9.html#SECTION009200000000000000000)
The strange thing is that it worked under tiger with an older vesion
of python without any problem....
Dec 3 '07 #4
dirkheld wrote:
On 3 dec, 14:54, "Diez B. Roggisch" <de...@nospam.web.dewrote:
>dirkheld wrote:
Hi,
I upgraded my system from tiger to leopard. With leopard came a new
version of python 2.5
Now I trying to run some python code that previously worked on tiger
(which included an older version of python).
This is the error I'm receiving :
Traceback (most recent call last):
File "test.py", line 18, in print_total
f=open('a_file.txt','w')
IOError: [Errno 2] No such file or directory: 'a_file.txt'
Is this a bug in python? This code worked on my old system

The obvious question is: do you have 'a_file.txt' on your new system?
There are many happy python programmers on leopard, and this is one heck
of a basic functionality - I really doubt it's broken in such obvious way
(if any at all).

Diez

I don't have a file called 'a_file.txt'
I want to create that file and write some data to it. (http://
docs.python.org/tut/node9.html#SECTION009200000000000000000)
The strange thing is that it worked under tiger with an older vesion
of python without any problem....
Oh sorry, my bad. I didn't see the mode flag. Do you by any chance happen to
not have the right to create files in the directory you are? What happens
if you use it in /tmp for example?

Still, I hold up to my reasoning: writing files is so essential in python,
and certainly not subject to great - if any - change (after all, it's just
calling the underlying OS functions) that I doubt it is broken.

Diez
Dec 3 '07 #5
dirkheld <di******@gmail.comwrites:
I don't have a file called 'a_file.txt'
I want to create that file and write some data to it.
How exactly are you starting the Python interpreter? "No such file or
directory" on file creation can happen when you try to create a file
in a directory that has ceased to exist:

$ mkdir x
$ cd x
$ rm -rf ~/x
$ python
Python 2.5.1 (r251:54863, Oct 5 2007, 13:36:32)
[GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>f = open('foo', 'w')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
IOError: [Errno 2] No such file or directory: 'foo'
Dec 3 '07 #6
How exactly are you starting the Python interpreter? "No such file or
directory" on file creation can happen when you try to create a file
in a directory that has ceased to exist:
Damn...now it's time to be ashamed. Because of my new installation of
leopard I used another computername. So the path were I wanted to
write to didn't exist any more.

Previous : /users/dirkheld/programming/python/....
Now : /users/dirk/programming/python/...

Sorry for keeping you guys busy with such a mistake ;)
Dec 4 '07 #7
dirkheld a écrit :
>>How exactly are you starting the Python interpreter? "No such file or
directory" on file creation can happen when you try to create a file
in a directory that has ceased to exist:


Damn...now it's time to be ashamed. Because of my new installation of
leopard I used another computername. So the path were I wanted to
write to didn't exist any more.

Previous : /users/dirkheld/programming/python/....
Now : /users/dirk/programming/python/...
which should remind everybody that hard-coding a path is a bad idea !-)
Sorry for keeping you guys busy with such a mistake ;)
Dec 4 '07 #8
Sorry for keeping you guys busy with such a mistake ;)

No apologies necessary, especially since you reported the final
outcome. Now anybody searching on that message will find a complete
thread and a lesson learned.

rick
Dec 5 '07 #9

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

13
by: squash | last post by:
I am a little annoyed at why such a simple program in Perl is causing so much difficulty for python, i.e: $a += 200000 * 140000; print $a;
1
by: Daves | last post by:
a simple aspx page just needs to send a particular .txt file to stream so that it opens up in Notepad on client side. Using ContentType = "text/plain" it still opens in IE browser as a html file,...
7
by: jacobevans | last post by:
i need some help opening a text file and having the contents in that file add to a list. for example a user types '/addlist C:/text.txt'. the program takes the c:/text.txt and adds the items to...
1
by: simon_s_li | last post by:
Hi, Does anyone have any coding example on how to select a text or csv file (file open diagloue box) from my local drive and then read it in the backend using some kind of inputsteam? Thanks...
0
by: taylorcarr | last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
0
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.