Description

assignee = None
closed_at = None
created_at = <Date 2006-01-06.19:23:52.000>
labels = ['extension-modules', 'type-bug', '3.10', 'docs']
title = 'Example in section 5.3 "Pure Embedding" doesn\'t work.'
updated_at = <Date 2020-12-29.04:39:25.362>
user = 'https://bugs.python.org/wrstuden'

activity = <Date 2020-12-29.04:39:25.362>
actor = 'orsenthil'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation', 'Extension Modules']
creation = <Date 2006-01-06.19:23:52.000>
creator = 'wrstuden'
dependencies = []
files = []
hgrepos = ['261']
issue_num = 1398781
keywords = []
message_count = 7.0
messages = ['60866', '60867', '60868', '182510', '212842', '221302', '348609']
nosy_count = 7.0
nosy_names = ['georg.brandl', 'georg.brandl', 'vstinner', 'wrstuden', 'docs@python', 'Ramchandra Apte', 'fkochem', 'jhao']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'test needed'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue1398781'
versions = ['Python 3.10']

Activity

1. wrstuden commented on Jan 6, 2006

   

   wrstudenmannequin

   on Jan 6, 2006

   MannequinAuthor

   More actions

   I want to use Python to script an existing application.
   So I was trying the code on
   http://docs.python.org/ext/pure-embedding.html and
   found it didn't work.

   I am using pkgsrc on NetBSD.

   I have run into two issues. First,
   PyDict_GetAttrString() does not exist. I have found
   this to be true for both Python 2.2 and 2.4, the two
   versions I currently have installed.

   I made the simple change to use
   PyObject_GetAttrString(), which looks right.

   Second, python can't find the module. I named the file
   multiply.py, and it wouldn't load.

   It turns out that I had to set PYTHONPATH in my
   envirnment to make it work. Setting it to '' (empty
   string) worked.

   The odd thing about the path issue is that if I ran the
   python interpreter, it was able to find the module w/o
   my changing the environment.
2. wrstuden

   added

   extension-modulesC modules in the Modules dirC modules in the Modules dir

   on Jan 6, 2006
3. birkenfeld commented on Jan 6, 2006

   

   birkenfeld

   on Jan 6, 2006

   Member

   More actions

   Logged In: YES
   user_id=1188172

   The PyDict_GetAttrString issue is corrected in the current
   devel docs.

   No clue about the other.
4. wrstuden commented on Jan 6, 2006

   

   wrstudenmannequin

   on Jan 6, 2006

   MannequinAuthor

   More actions

   Logged In: YES
   user_id=148388

   Great to hear about PyDict_GetAttrString(). I assume that
   PyObject_GetAttrString() was the correct change?

   It turns out the second issue deals with path processing in
   the embedded code being somehow different from processing in
   the interpreter. I think the interpreter sets something up
   that isn't present for the embedded example. I will really
   appreciate it if we could figure out what's different and
   add it to the docs. The pictured behavior for "call" is
   exactly what I want, but not what I get.

   To be more specific, I had my code print Py_GetPath(), and I
   compared that with sys.path from the interpreter.

   C code looking for foo.py (which is in '.'):

   ./obj.i386/test foo
   Path is
   '/usr/pkg/lib/python24.zip:/usr/pkg/lib/python2.4/:/usr/pkg/lib/python2.4/plat-netbsd3:/usr/pkg/lib/python2.4/lib-tk:/usr/pkg/lib/python2.4/lib-dynload'
   ImportError: No module named foo
   utest: loading module foo: No such file or directory

   In the python interpreter:

   > python2.4
   Python 2.4.1 (#1, Dec 28 2005, 15:58:29) 
   [GCC 3.3.3 (Wasabi NetBSD nb3 20040520)] on netbsd3
   Type "help", "copyright", "credits" or "license" for more
   information.
   >>> import sys
   >>> print sys.path
   ['', '/usr/pkg/lib/python24.zip', '/usr/pkg/lib/python2.4',
   '/usr/pkg/lib/python2.4/plat-netbsd3',
   '/usr/pkg/lib/python2.4/lib-tk',
   '/usr/pkg/lib/python2.4/lib-dynload',
   '/usr/pkg/lib/python2.4/site-packages']

   The key difference is the '' at the front of the path in the
   interpreter.

   Any thoughts? Is there a different list or FAQ I should look at?
5. devdanzin

   added

   docsDocumentation in the Doc dirDocumentation in the Doc dir

   on Mar 20, 2009
6. devdanzin

   assigned

   birkenfeld

   on Mar 20, 2009
7. devdanzin

   added

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   docsDocumentation in the Doc dirDocumentation in the Doc dir

   on Mar 20, 2009
8. devdanzin

   assigned

   birkenfeld

   on Mar 20, 2009
9. devdanzin

   added

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Mar 20, 2009
10. devdanzin

    added

    easy

    on Apr 22, 2009
11. BreamoreBoy

    assigned

    docspython

    and unassigned

    birkenfeld

    on Aug 26, 2010
12. 4 remaining items

13. jhao commented on Jun 22, 2014

    

    jhaomannequin

    on Jun 22, 2014

    Mannequin

    More actions

    I have updated the example in the doc. This default behavior is introduced because of security reason as detailed in http://bugs.python.org/issue5753
14. vstinner commented on Jul 29, 2019

    

    vstinner

    on Jul 29, 2019

    Member

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    This issue is 13 years old, inactive for 5 years, has a patch: it's far from being "newcomer friendly", I remove the "Easy" label.
15. orsenthil

    added

    3.10 (EOL)end of lifeend of life

    and removed

    easy

    on Dec 29, 2020
16. ezio-melotti

    transferred this issue fromon Apr 10, 2022
17. slateny commented on Jun 13, 2022

    

    slateny

    on Jun 13, 2022

    Contributor

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    The earliest link to the original issue I could find is this, which has a section matching the title, and the example in that does seem to correspond to the modern link here.
18. encukou

    marked C-API Pure Embedding enhancement #68840 as a duplicate of this issue on Jun 18, 2025
19. ashm-dev commented on Nov 13, 2025

    

    ashm-dev

    on Nov 13, 2025

    Contributor

    More actions

    Ping. Is this issue still relevant?
20. vstinner

    added

    topic-C-API

    on Nov 13, 2025
21. github-project-automation

    added this to docs issueson Nov 13, 2025
22. github-project-automation

    moved this to Todo in docs issueson Nov 13, 2025
23. vstinner commented on Nov 13, 2025

    

    vstinner

    on Nov 13, 2025

    Member

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    Let's close this old issue. The context is now outdated.

    The doc now lives at: https://docs.python.org/dev/extending/embedding.html.

    If someone is still impacted by the issue, please open a new issue.
24. vstinner

    closed this as not plannedon Nov 13, 2025

Issue actions