[Moshe]
> Something better to do would be to use
> import foo as _foo
[Paul]
> It's pretty clear that nobody does this now and nobody is going
> to start doing it in the near future. It's too invasive and it
> makes the code too ugly.
Actually, this function is one of my std utilities:
def _pvt_import(globs, modname, *items):
"""globs, modname, *items -> import into globs with leading "_".
If *items is empty, set globs["_" + modname] to module modname.
If *items is not empty, import each item similarly but don't
import the module into globs.
Leave names that already begin with an underscore as-is.
# import math as _math
>>> _pvt_import(globals(), "math")
>>> round(_math.pi, 0)
3.0
# import math.sin as _sin and math.floor as _floor
>>> _pvt_import(globals(), "math", "sin", "floor")
>>> _floor(3.14)
3.0
"""
mod = __import__(modname, globals())
if items:
for name in items:
xname = name
if xname[0] != "_":
xname = "_" + xname
globs[xname] = getattr(mod, name)
else:
xname = modname
if xname[0] != "_":
xname = "_" + xname
globs[xname] = mod
Note that it begins with an underscore because it's *meant* to be exported
<0.5 wink>. That is, the module importing this does
from utils import _pvt_import
because they don't already have _pvt_import to automate adding the
underscore, and without the underscore almost everyone would accidentally
export "pvt_import" in turn. IOW,
import M
from N import M
not only import M, by default they usually export it too, but the latter is
rarely *intended*. So, over the years, I've gone thru several phases of
naming objects I *intend* to export with a leading underscore. That's the
only way to prevent later imports from exporting by accident. I don't
believe I've distributed any code using _pvt_import, though, because it
fights against the language and expectations. Metaprogramming against the
grain should be a private sin <0.9 wink>.
_metaprogramming-ly y'rs - tim
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