[Python-Dev] module extension search order (original) (raw)

[Python-Dev] module extension search order - can it be changed?

Bill Bumgarner bbum@codefab.com
Tue, 25 Feb 2003 15🔞51 -0500

On Tuesday, Feb 25, 2003, at 15:04 US/Eastern, python-dev-request@python.org wrote:

python23.zip is good for end users of programs written in Python, but not so good for Python programmers: AFAIK it won't show source lines in tracebacks for modules loaded from the zip file.

Speaking entirely from a point of ignorance, why are the source line #s not shown for frames that are implemented in modules loaded from zipimport?

Assuming the ZIP archive could be exactly identical to what one might find in /usr/lib/python2.3/, the zip could contain all the py + pyc as found in the normal library?

As such, it would be trivial for the developer to unzip the zip into-- for example-- /tmp/ for reference purposes. Assuming the developer has a copy of the 2.3 source lying around and has the zip with just the PYC, the lines numbers are still very useful.

All things considered, I would think it would be highly desirable for the developer's Python development environment to be as much like a stock deployment environment as possible. Java made a grave mistake in this regard -- the whole class loader mechanism can cause massive problems-- very annoying and hard to debug problems-- when moving code from a development environment into deployment if the class loader that loads a particular class changes between the two environments.

b.bum