On 12/05/2011 16:21, Tim Golden wrote:
On 12/05/2011 15:11, Ayaskanta Swain wrote:
Please help me in solving the following issue I am facing while
executing my python script. Basically I am executing the OS specific
move command to move a file/dir from one location to another.
Why? Why not use os.rename or shutil.move which already do
whatever is needed under the covers for different Operating Systems?
os.popen returns a file-like object from which you can read any
error messages generated. You're not doing that, and os.popen
won't raise an error itself unless you, say, pass it a number
rather than a string.
<code>
import os
output = os.popen ("dir")
print output.read ()
#
# But note:
#
os.popen ("Nonsen*se")
# raises no exception
</code>
If you want exceptions, try the subprocess module:
>>> import subprocess
>>> subprocess.Popen("Nonsen*se")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py",
line 672, in __init__
errread, errwrite)
File
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py",
line 1201, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
>>>
In fact, os.popen is deprecated in favour of subprocess.Popen().
HTH,
-- HansM
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