Hello,
I have written an importing extension along the lines of PEP 302
(http://www.python.org/dev/peps/pep-0302/) and have run into a bit of a
problem with stack backtraces after exceptions.
When I run code with the using my importing extension, backtraces come
up looking like this:
Traceback (most recent call last):
File "<string>", line 134, in <module>
File "<string>", line 9, in <module>
File "<string>", line 7, in a
File "<string>", line 4, in b
TypeError
What I'm having a problem with is that the file names are no longer
being printed during the backtrace. The following code is from my
importer function load_module:
try:
mod = sys.modules[module_name]
already_in_sys_modules = True
except KeyError:
mod = sys.modules.setdefault(module_name,
imp.new_module(module_name))
already_in_sys_modules = False
mod.__file__ = "%s" % module_path
mod.__loader__ = self
if is_package:
mod.__path__ = [ module_path ]
mod.__dict__['__file__'] = module_path
try:
exec code in mod.__dict__
except:
import traceback
print traceback.format_exc(5)
print "ERROR: could not load module: %s" % module_path
if not already_in_sys_modules:
del sys.modules[module_name]
mod = None
As shown in PEP 302, I am setting the mod.__file__ variable and as my
own idea I set __file__ in mod.__dict__. Niether of these steps seem to
set the file properly in the backtrace.
So the question here is, where does the backtrace printing module get
it's __file__ parameters from, or what am I missing to set it properly?
Thanks in advance.
--
Burton Samograd
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