Bruno Desthuilliers wrote:
As the name imply, built-in modules are built in the interpreter - IOW,
they are part of the interpreter *exposed* as modules[1]. Unless you
have a taste for gory implementation details, just don't worry about this.
Other "ordinary" modules need of course to be executed once when first
loaded - IOW, the first time they are imported. All statements[2] at the
top-level of the module are then sequentially executed, so that any
relevant object (functions, classes, whatever) are created and bound in
the module's namespace.
Builtin modules like thread, signal etc. as well as C extensions like
socket have an initialization function. The initialization function is
called during the first import of a module. It creates the module object
and assigns objects to its __dict__ attribute.
Builtin modules are statically linked into the Python executable /
library while normal C extensions are shared libraries. Some modules are
builtins because they are required during boot strapping. It's possible
to embed most C modules into the core.
Christian
--
http://mail.python.org/mailman/listinfo/python-list
