Guido wrote:
> Obviously if the data files get stored in the zip file too, the code
> searching for it needs to be made zip file aware; but if zip files are
> used to provide *other* libraries, that shouldn't break code that
> looks for data files along sys.path.
as I might have mentioned before, it would be really nice if custom
importers supported optional "load_data" and "get_module_names"
hooks.
the former can be used by code that looks for data files on the path
(Zope, PIL, most likely hundreds of other tools/programs):
for path in sys.path:
if hasattr(path, "load_data"):
try:
data =3D path.load_data(name)
except IOError:
pass
else:
return data # got it
if isinstance(path, types.StringTypes) and os.path.isdir(path):
try:
data =3D open(os.path.join(path, file)
except IOError:
pass
else:
return data
# ...
the latter can be used by code that looks for plugins using a
name pattern (PIL's *ImagePlugins, for example):
for path in sys.path:
if hasattr(path, "get_module_names"):
names =3D path.get_module_names()
elif isinstance(path, types.StringTypes) and =
os.path.isdir(path):
names =3D os.listdir(path)
else:
continue
for name in names:
if name.endswith("ImagePlugin"):
__import__(name)
(stupid idea: why not change os.path.isdir to return False for non-
string arguments? it's a predicate function, after all...)
</F>
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