Newbie edit/compile/run cycle question
Diez B. Roggisch
deets at nospam.web.de
Mon Dec 10 10:25:33 EST 2007
MartinRinehart at gmail.com wrote:
> Bruno,
>
> Please explain why the NOP import is a GoodThing. Use small words
> please. I'm not as young as I used to be.
Because otherwise every import would result in overhead without any benefit.
Think of a module like this:
--------
A_GLOBAL_VARIABLE = extremely_costly_initialization_of_cache_contents()
--------
You only want that to happen once.
> I didn't know about reload(), but now that I'm informed on that point
> I'm still using
>
> os.remove('foo.pyc')
> reload(foo)
>
> A single command to do that would be nice.
You can create your own function that does this.
def better_reload(module):
import os
if os.path.exists(module.__file__) and module.__file__[-3:] == 'pyc':
os.remove(module.__file__) # attention - you might want more checks
reload(module)
Then you can put that into a file, e.g.
~/.pythonrc
and point the environment-variable PYTHONSTARTUP to that file.
Diez
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