Redirecting output to a file

Scripting Issues
1

I’m trying to redirect the output of some commands to a file like this:

f=open(“out.txt”,“w”)
print >>f, render.ls()
or
print >>f,cvMgr

But it doesn’t work. Text appears on the console but it’s some sort of side-effect.

How can we solve this situation? Thanks in advance.

2

Try:

strm = StringStream()
render.ls(strm)
open('out.txt', 'w').write(strm.getData())

Or:

strm = StringStream()
cvMgr.write(strm)
open('out.txt', 'w').write(strm.getData())

David

3

Do you mind that i add this to your wiki into a new appendix? Maybe something called “Forum Highlights”. This way i won’t forget this information.

4

There was also a way to specify the file to write to in the config file.

5

Yes. You can put:
notify-output out.txt
to write all Panda output to out.txt. It’s also possible to do this on a one-at-a-time basis at runtime with some careful low-level calls into Notify.

There are lots of ways to achieve this. The StringStream approach is just one quick-and-dirty answer.

David

6

Here’s an approach that doesn’t require saving the entire output in RAM (the output is directly written to the named file). Especially important if the output might be very large:

strm = MultiplexStream()
strm.addFile(Filename('out.txt'))
render.ls(strm)

David

7

Thanks. I have a request, for the manual. Is that if someone could add a chapter summarizing all about Panda input/output classes and related stuff like filenames, zip archives, net i/o, and notifications.

8

The manual is a wiki. You can add stuff yourself, if you like.

9

I don’t see any edit links in there like the other wikis.

PS: Never mind, i found how it is done.

10

I have updated the FAQ page on the manual with the info on this thread and a few more things i asked before:

panda3d.org/manual/index.php/FAQ

There may be some syntax errors because i’m not an English native speaker.