failed to import module from lib-dynload

[legerf]

BPO	4581
Nosy	@loewis

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2008-12-08.03:58:12.481>
created_at = <Date 2008-12-07.20:41:16.949>
labels = ['library', 'performance']
title = 'failed to import module from lib-dynload'
updated_at = <Date 2008-12-08.03:58:12.480>
user = 'https://bugs.python.org/legerf'

bugs.python.org fields:

activity = <Date 2008-12-08.03:58:12.480>
actor = 'loewis'
assignee = 'none'
closed = True
closed_date = <Date 2008-12-08.03:58:12.481>
closer = 'loewis'
components = ['Library (Lib)']
creation = <Date 2008-12-07.20:41:16.949>
creator = 'legerf'
dependencies = []
files = []
hgrepos = []
issue_num = 4581
keywords = []
message_count = 5.0
messages = ['77251', '77253', '77263', '77266', '77270']
nosy_count = 2.0
nosy_names = ['loewis', 'legerf']
pr_nums = []
priority = 'normal'
resolution = 'works for me'
stage = None
status = 'closed'
superseder = None
type = 'resource usage'
url = 'https://bugs.python.org/issue4581'
versions = ['Python 3.0']

[legerf]

I test PY3K.final under Debian/Lenny.

• Install steps "Configure, make, make test, make install don't generate
  errors for the modules in "lib-dynload".

• "/usr/lib/python3.0/lib-dynload", contain modules (time.so, math.so, ...)

• print(sys.path) = ['', '/usr/lib/python3.0', '/home/fred/python',
  '/usr/lib/python3.0/lib/python30.zip',
  '/usr/lib/python3.0/lib/python3.0',
  '/usr/lib/python3.0/lib/python3.0/plat-linux2',
  '/usr/lib/python3.0/lib/python3.0/lib-dynload']

• When I launch "python3.0" no error is generate, but when I try to
  import modules in "lib-dynload" :

Python 3.0 (r30:67503, Dec  7 2008, 19:22:34) 
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named time
[33620 refs]

[loewis]

How did you run configure? What is sys.exec_prefix?

'/usr/lib/python3.0/lib/python3.0/lib-dynload' should not be on
sys.path, but '/usr/lib/python3.0/lib-dynload' should be.

[legerf]

• "configure --with-pydebug --with-doc-strings --enable-shared
  --enable-profiling --enable-ipv6 --with-threads --with-tsc --prefix=/usr"

- ">>> print(sys.exec_prefix)
/usr/lib/python3.0"
>>> print(sys.path)
['', '/usr/lib/python3.0', '/home/fred/python',
'/usr/lib/python3.0/lib-dynload', '/usr/lib/python3.0/lib/python30.zip',
'/usr/lib/python3.0/lib/python3.0',
'/usr/lib/python3.0/lib/python3.0/plat-linux2',
'/usr/lib/python3.0/lib/python3.0/lib-dynload']
[33634 refs]
>>> import time
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named time"

I don't understand why I see "/usr/lib/python3.0/lib/python3.0/..." and
why the time can't import, it is in "/usr/lib/python3.0/lib-dynload"

[loewis]

I can't reproduce this. Are you sure you didn't configure with
--prefix=/usr/lib/python3.0 at some point? That would be about the only
way how sys.exec_prefix could get its value?

Can you start over with a clean source tree, and try reproducing it again?

[legerf]

Ok Martin, I delete all source and /usr/lib/python3.0, restart from the
tarball. I apply the patch dbm.diff (issue4581) and after :
"configure --with-pydebug --with-doc-strings --enable-shared
--enable-profiling --enable-ipv6 --with-threads --with-tsc --prefix=/usr
> ../configure.log 2>&1
make > ../make.log 2>&1
make altinstall > ../altinstall.log 2>&1"
Launch "python3.0" and test import :
>>> import math, cmath, bz2, crypt, readline
[34363 refs]
SUCCESSFUL ! So "make clean" can't always sufficient, I learn than in
some case need to restart from the tarball is a necessary test. Many
thinks for this lesson. You can close this issue.