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Created on 2007-10-15 13:12 by pythonmeister, last changed 2022-04-11 14:56 by admin. This issue is now closed.
| Messages (3) | |||
|---|---|---|---|
| msg56439 - (view) | Author: Stefan Sonnenberg-Carstens (pythonmeister) | Date: 2007-10-15 13:12 | |
When doing such
os.system("a command wich writes a outfile")
f = open("the file the command before wrote")
the file is empty.
If I do this:
os.popen("a command wich writes a outfile")
f = open("the file the command before wrote")
everything is fine
|
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| msg56440 - (view) | Author: Tim Golden (tim.golden) *  |
Date: 2007-10-15 13:44 | |
Not, apparently, on my (XP SP2) box:
<dump>
Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.system ("""python -c "f=open
('temp.txt','w');f.write('hello');f.close ()"""); print open
("temp.txt").read ()
0
hello
>>>
</dump>
Perhaps you could provide a runnable piece of code which demonstrates
the problem?
|
|||
| msg59183 - (view) | Author: Christian Heimes (christian.heimes) * |
Date: 2008-01-03 23:58 | |
It might happen when the program hasn't terminated yet. You have to make sure the program has terminated before you read the file. Subprocess and its wait() should help. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:56:27 | admin | set | github: 45620 |
| 2008-01-03 23:58:40 | christian.heimes | set | status: open -> closed resolution: wont fix messages: + msg59183 nosy: + christian.heimes |
| 2007-10-15 13:44:25 | tim.golden | set | nosy:
+ tim.golden messages: + msg56440 |
| 2007-10-15 13:12:56 | pythonmeister | create | |