Accessing global namespace from module
Hello,
I am new to Python. I have the following question / problem.
I have a visualization software with command-line interface (CLI),
which essentially is a Python (v. 2.5) interpreter with functions
added to the global namespace. I would like to keep my own functions
in a separate module and then import that module to the main script
(that will be executed using the CLI interpreter). The problem is, I
cannot access the functions in the global namespace of the main script
from my module. Is there anyway to do that ?
Here is an example of what I meant. The function AddPlot() and
DrawPlots() are added to the global namespace by the software CLI. If
I do this:
mainscript.py:
---
AddPlot("scatter", "coordinate")
# set other things here
DrawPlots()
it works fine. But I want to be able to do this:
myModule.py:
--
def defaultScatterPlot():
AddPlot("scatter", "coordinate")
#do other things
DrawPlots()
and then in mainscript.py:
---
import myModule
myModule.defaultScatterPlot()
This won't work because myModule.py doesnot have access to AddPlot().
How do I do something like this ?
Thank you in advance for any help.
RDB
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Re: Accessing global namespace from module
On Jun 11, 1:37 pm, [EMAIL PROTECTED] wrote: > On Jun 11, 11:02 am, reubendb <[EMAIL PROTECTED]> wrote: > > > > > Hello, > > I am new to Python. I have the following question / problem. > > I have a visualization software with command-line interface (CLI), > > which essentially is a Python (v. 2.5) interpreter with functions > > added to the global namespace. I would like to keep my own functions > > in a separate module and then import that module to the main script > > (that will be executed using the CLI interpreter). The problem is, I > > cannot access the functions in the global namespace of the main script > > from my module. Is there anyway to do that ? > > > I think you're doing it backwards. If you want access to AddPlot, then > you should import mainscript into that module instead of the other way > around. When I have common methods I want to call from different > scripts, I put those methods/functions into their own module/file. > Then I just import the module and call whatever script I need. > > > > commonMods.py > - > AddPlot(*args, *kwargs): > # Do something > DrawPlots(*args, *kwargs): > # Do something > - Hi Mike, The problem is I don't define the functions AddPlot() and DrawPlots(). It's built into the python interpreter of the CLI version of the program I mentioned, and they are defined on the main script. I load the main script using something like "software -cli -s mainscript.py". In the mainscript.py I import myModule, but of course myModule does not have access to the functions defined in the global namespace of mainscript.py. Thanks. RDB -- http://mail.python.org/mailman/listinfo/python-list
Re: Accessing global namespace from module
On Jun 11, 3:30 pm, "Gabriel Genellina" <[EMAIL PROTECTED]> wrote: > En Mon, 11 Jun 2007 15:18:58 -0300, reubendb <[EMAIL PROTECTED]> escribió: > > > The problem is I don't define the functions AddPlot() and DrawPlots(). > > It's built into the python interpreter of the CLI version of the > > program I mentioned, and they are defined on the main script. I load > > the main script using something like "software -cli -s > > mainscript.py". > > In the mainscript.py I import myModule, but of course myModule does > > not have access to the functions defined in the global namespace of > > mainscript.py. > > Don't you have some import statements at the top of mainscript.py that are > responsible for bringing AddPlot and DrawPlots into the current namespace? > Import the same things in your second module. No, I *don't* have any import statement mainscript.py. When using this software's CLI, AddPlot and DrawPlots are available to me automagically from mainscript.py. Hence my question: How do I make this available from other module. Is there any way at all ? Thanks. RDB -- http://mail.python.org/mailman/listinfo/python-list
Redirecting stderr to null and revert
Hello,
I have some function that output too much stuff to stderr when called,
and I have no control over the function itself. So I thought as a
workaround, I redirect stderr to /dev/null before calling that
function, and then revert the stderr back after calling that
function.
I have something like this:
def nullStderr():
sys.stderr.flush()
err = open('/dev/null', 'a+', 0)
os.dup2(err.fileno(), sys.stderr.fileno())
def revertStderr():
sys.stderr = sys.__stderr__
Then when calling the function, I want to do:
nullStderr()
noisyFunction(foo, bar)
revertStderr()
The problem is the "revertStderr()" doesn't work, ie. I still get no
stderr back after calling it (stderr still redirects to /dev/null). I
want stderr back so that when the script fails in different places
later I can get error messages. What am I missing here ? Thanks a lot
for any help.
RDB
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