On 5/6/2014 1:14 PM, Terry Reedy wrote: > On 5/5/2014 5:32 PM, Anthony Tuininga wrote: >> Hi, >> >> I am the author of cx_Freeze which creates "frozen" executables from >> Python scripts. To this point I have been using frozen modules (compiled >> C) but this has the side effect of bundling parts of Python with a >> cx_Freeze release -- and this has bitten me on a number of occasions >> when newer versions of Python use slightly incompatible modules. :-) >> >> By scanning the code I discovered that Python automatically searches on >> startup >> >> <PYTHONHOME>/lib/pythonNN.zip >> >> where NN is replaced by the major and minor version that is being >> executed. Using this would allow me to ensure that bootstrap modules are >> not bundled with cx_Freeze but acquired from the distribution that is >> actually using it -- thereby eliminating the hassle noted above. >> >> I have tested this approach and found it works flawlessly. There is, >> however, no documentation that I can find for the contents of sys.path >> -- the documentation simply says that it is an installation default and >> doesn't specify what that default is. >> >> So my question is: can I safely make use of this "feature"? It has >> remained in place since at least Python 2.6 but I don't want to assume >> anything. Please advise! Thanks. > > I would say yes. AFAIK /lib has always by used for the stdlib on Windows > and /lib/pythonxy on *nix. Both are mentioned in the 4th paragraph of > the site module doc. We do not lightly change directory structure. PEP > 273 then says "The zip archive must be treated exactly as a subdirectory > tree,". I take this to mean that lib/pythonxy.zip should work the same > as lib/pythonxy/ does. > > You can depend on the feature working as long as it works. Your bigger > worry is accidental regression. I suggest testing release candidates > (there is one for 3.4.1 now, I believe) and also an early alpha and beta > for new release. The candidate may have a zip patch affecting central > directory reading. If not, there is an issue on the tracker. You could > monitor patches by filtering the new-issue announcements for 'zip'.
The best course of action would be to integrate any such tests into the stdlib test suite, where a regression would immediately be detected. Eric. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
