On Mon, Jan 12, 2015 at 03:40:36PM -0500, Barry Warsaw wrote:
> Something else must still be going on. I have the following zope packages
> installed:
>
> % aptitude search zope | grep ^i
> i python-zope.component - Zope Component Architecture
>
> i python-zope.configuration - Zope Configuration Markup Language
> (ZCML)
> i python-zope.deprecation - Zope Deprecation Infrastructure
>
> i python-zope.event - Very basic event publishing system
>
> i python-zope.exceptions - Zope exceptions for Python
>
> i python-zope.i18nmessageid - Message Identifiers for
> internationalizati
> i A python-zope.interface - Interfaces for Python
>
> i python-zope.location - Tools for working with object locations
>
> i python-zope.proxy - Generic transparent proxies for Python
>
> i python-zope.schema - zope.interface extension for defining
> data
> i python-zope.security - Zope Security Framework
>
> i python-zope.testing - Zope testing helpers
>
> i python-zope.testrunner - Flexible test runner with layer support
> fo
> i python3-zope.component - Zope Component Architecture
>
> i python3-zope.configuration - Zope Configuration Markup Language
> (ZCML)
> i python3-zope.deprecation - Zope Deprecation Infrastructure
>
> i python3-zope.event - Very basic event publishing system
>
> i python3-zope.exceptions - Zope exceptions for Python 3
>
> i python3-zope.i18nmessageid - Message Identifiers for
> internationalizati
> i python3-zope.interface - Interfaces for Python3
>
> i python3-zope.location - Tools for working with object locations
>
> i python3-zope.proxy - Generic transparent proxies for Python
>
> i python3-zope.schema - zope.interface extension for defining
> data
> i python3-zope.testing - Zope testing helpers for Python 3
>
> i python3-zope.testrunner - Flexible test runner with layer support
> fo
> i A zope-common - common settings and scripts for Zope
> insta
> i zope2.13 - Open Source Web Application Server
>
> so definitely python-zope.security, python-zope.proxy, and zope2.13.
^^^^^^^^^^^^^^^^^^^^
> and yet...
>
> % /usr/lib/zope2.13/bin/python
>
> >>> import zope.security._proxy
> >>> zope.security._proxy.__file__
> '/usr/lib/python2.7/dist-packages/zope/security/_proxy.x86_64-linux-gnu.so'
I think I'm starting to understand: I do _not_ have python-zope.security
installed (because nothing depends on it including zope2.13).
clean@teco:~$ dpkg -l |grep zope
ii python-zope.interface 4.1.1-3.1
ii python-zope.proxy 4.1.4-2
ii zope-common 0.5.54
ii zope2.13 2.13.22-1
If I install python-zope.security, then import goes ok:
clean@teco:~$ dpkg -l |grep zope
ii python-zope.component 4.2.1-2
ii python-zope.event 4.0.3-2
ii python-zope.i18nmessageid 4.0.3-1
ii python-zope.interface 4.1.1-3.1
ii python-zope.location 4.0.3-1
ii python-zope.proxy 4.1.4-2
ii python-zope.schema 4.4.2-1
ii python-zope.security 4.0.1-1
ii zope-common 0.5.54
ii zope2.13 2.13.22-1
clean@teco:~$ /usr/lib/zope2.13/bin/python
>>> import zope.security._proxy
>>> zope.security._proxy.__file__
'/usr/lib/python2.7/dist-packages/zope/security/_proxy.x86_64-linux-gnu.so'
but the imported module is NOT from zope2.13 package, as it should be:
clean@teco:~$ dpkg -L zope2.13 |grep security |grep proxy.so
/usr/lib/zope2.13/lib/python/zope.security-3.7.4.egg/zope/security/_proxy.so
after purging python-zope.security import fails, but in a new way:
clean@teco:~$ dpkg -l |grep zope
ii python-zope.interface 4.1.1-3.1
ii python-zope.proxy 4.1.4-2
ii zope-common 0.5.54
ii zope2.13 2.13.22-1
clean@teco:~$ /usr/lib/zope2.13/bin/python
>>> import zope.security._proxy
Traceback (most recent call last):
File "<console>", line 1, in <module>
ImportError: No module named security._proxy
and if I remove and then install zope2.13 (with python-zope.security
still being removed) it is still the same:
clean@teco:~$ dpkg -l |grep zope
ii python-zope.interface 4.1.1-3.1
ii python-zope.proxy 4.1.4-2
ii zope-common 0.5.54
ii zope2.13 2.13.22-1
clean@teco:~$ /usr/lib/zope2.13/bin/python
>>> import zope.security._proxy
Traceback (most recent call last):
File "<console>", line 1, in <module>
ImportError: No module named security._proxy
and if then I remove python-zope.proxy:
clean@teco:~$ dpkg -l |grep zope
ii zope-common 0.5.54
ii zope2.13 2.13.22-1
clean@teco:~$ /usr/lib/zope2.13/bin/python
>>> import zope.security._proxy
>>> zope.security._proxy.__file__
'/usr/lib/zope2.13/lib/python/zope.security-3.7.4.egg/zope/security/_proxy.so'
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
NOTE - different from
/usr/lib/python2.7/dist-packages/zope/security/_proxy.x86_64-linux-gnu.so'
and if I install python-zope.proxy again:
clean@teco:~$ dpkg -l |grep zope
ii python-zope.interface 4.1.1-3.1
ii python-zope.proxy 4.1.4-2
ii zope-common 0.5.54
ii zope2.13 2.13.22-1
clean@teco:~$ /usr/lib/zope2.13/bin/python
>>> import zope.security._proxy
Traceback (most recent call last):
File "<console>", line 1, in <module>
File
"/usr/lib/zope2.13/lib/python/zope.security-3.7.4.egg/zope/security/__init__.py",
line 19, in <module>
from zope.security.management import checkPermission
File
"/usr/lib/zope2.13/lib/python/zope.security-3.7.4.egg/zope/security/management.py",
line 23, in <module>
from zope.security.checker import CheckerPublic
File
"/usr/lib/zope2.13/lib/python/zope.security-3.7.4.egg/zope/security/checker.py",
line 46, in <module>
from zope.security._proxy import _Proxy as Proxy, getChecker
SystemError: dynamic module not initialized properly
oops.
Conclusion: not enough isolation leads to either flaky behaviour (i.e.
zope.security imports, but version is 4.0.1-1 instead of expected by
zope2.13 3.7.4) or import failing at all.
And there is some hidden state which depends on packages installation
order etc...
So sad,
Kirill
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