[EMAIL PROTECTED] a écrit :
Hi,
I found on the net that there is something called module
initialization.
The Python C api has a module init function for C-coded modules. There's
no need for such a thing in pure Python modules since all the top-level
code is executed when the module is loaded (as a main script or the
first time the module is imported).
Unfortunately, there is not much information for this.
However, small the information I found module initialization can be of
use to me in my project.
I'm currently messing with a problem where I'm keeping my global
variables ( or symbols) in a module and the other mdoules in the
project acess these global variables.
remember that there's no such thing as a truely global namespace in
Python. "global" really means "module level".
However, there is one case when a module updates one such global
variable
While this is technically legal, you should restrain yourself from doing
such a thing, unless you *really* know what you're doing and why.
but the variable is not getting updated in the module
containing global symbols ( variables).
I suspect you didn't use a qualified name when importing. You have to do
it this way :
# myglobals.py:
answer = 42
# question.py
import myglobals
myglobals.answer = "WTF ?"
So, I thought of using this module initialization where I will
intialize the module only once to update that variable. Ans in the
rest of the program where ever this module is imported I shall be able
to easily access the update value of the variable.
Could some one provide me a sample code of module intialization?
All statements at the top-level of a module are executed when the module
is loaded. That's all it takes wrt/ module initialization.
And
how can I ensure that module initialization is done only once?
Unless you're doing weird things with __import__ or the imp module, you
shouldn't have to worry. import do two things : locate, load *and cache*
the module *if* it isn't already in cache, and bind names into the
importing namespace.
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