os.system(r"ls") prints to screen??

[Xah Lee]

does anyone know why the folllowing prints to the screen?

# python
import os
os.system(r"ls")

Xah
xa*@xahlee.org
∑ http://xahlee.org/

[Robert Kern]

Xah Lee wrote:

does anyone know why the folllowing prints to the screen?

# python
import os
os.system(r"ls")

os.system() starts a shell and has the shell execute the program as a
separate process. If you want to get the output of the given program,
then use the subprocess module.

--
Robert Kern
rk***@ucsd.edu

"In the fields of hell where the grass grows high
Are the graves of dreams allowed to die."
-- Richard Harter

[Steve Holden]

Xah Lee wrote:

does anyone know why the folllowing prints to the screen?

# python
import os
os.system(r"ls")

Xah
xa*@xahlee.org
∑ http://xahlee.org/

It only prints to the screen when standard output of the invoking
process is the screen. The sub-process forked by os.system inherits
stdin stdout and stderr from the invoking process.

This is all pretty basic stuff. Perhaps you should stop your verbal
assault on the computer science community and start to learn the
principles of what you are doing.

regards
Steve
--
Steve Holden [phone] [phone]
Holden Web LLC http://www.holdenweb.com/

[Xah Lee]

Steve Holden wrote:

This is all pretty basic stuff. Perhaps you should stop your verbal
assault on the computer science community and start to learn the
principles of what you are doing.

is this a supressed behavior that a human animal can finally
instinctively and justifiably release at another in a group frenzy?

Xah
xa*@xahlee.org
∑ http://xahlee.org/

[Steve Holden]

Xah Lee wrote:

Steve Holden wrote:

This is all pretty basic stuff. Perhaps you should stop your verbal
assault on the computer science community and start to learn the
principles of what you are doing.

is this a supressed behavior that a human animal can finally
instinctively and justifiably release at another in a group frenzy?

Seems to me that you'd know more about frenzy than me. Having read many
of your posts it seems to me that they are deliberately calculated to
inflame the reader.

To be successfully so critical of others you need to demonstrate
superior knowledge and judgment, which your original question revealed
to be lacking.

To put it another way: "People who live in glass houses shouldn't throw
stones".

regards
Steve
--
Steve Holden [phone] [phone]
Holden Web LLC http://www.holdenweb.com/

[Xah Lee]

do you know what the Muses do when a mortal challenged them?

And, please tell me exactly what capacity you hold under the official
Python organization so that i can calculate to what degree i can kiss
your ass or feign mum of your ignorance.

Xah
xa*@xahlee.org
∑ http://xahlee.org/

Steve Holden wrote:

Seems to me that you'd know more about frenzy than me. Having read many
of your posts it seems to me that they are deliberately calculated to
inflame the reader.

To be successfully so critical of others you need to demonstrate
superior knowledge and judgment, which your original question revealed
to be lacking.

To put it another way: "People who live in glass houses shouldn't throw
stones".

[Grant Edwards]

On 2005-09-04, Xah Lee <xa*@xahlee.org> wrote:

Steve Holden wrote:

This is all pretty basic stuff. Perhaps you should stop your
verbal assault on the computer science community and start to
learn the principles of what you are doing.

is this a supressed behavior that a human animal can finally
instinctively and justifiably release at another in a group
frenzy?

Wow. As Kelly Bundy would say: "The mind wobbles."

--
Grant Edwards grante Yow! BELA LUGOSI is my
at co-pilot...
visi.com

[Xah Lee]

Xah Lee wrote:

does anyone know why the folllowing prints to the screen?
# python
import os
os.system(r"ls")
Steve Holden wrote: It only prints to the screen when standard output of the invoking
process is the screen. The sub-process forked by os.system inherits
stdin stdout and stderr from the invoking process.

Thanks.

Xah
xa*@xahlee.org
∑ http://xahlee.org/