ImportError: No module named pydoc

[chaupv79@…]

Dear All, I have installed XML_RPC plugin to trac 0.12 but when I redirect to ​http://trac-domain/project/login/xmlrpc

there is an error as below:

While doing a GET operation on /login/xmlrpc, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{}

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

System Information

Trac	0.12
Genshi	0.6
mod_python	3.2.8
pysqlite	2.3.3
Python	2.4.3 (#1, Sep 21 2011, 20:06:00) [GCC 4.1.2 20080704 (Red Hat 4.1.2-51)]
setuptools	0.6c11
SQLite	3.3.6
Subversion	1.6.11 (r934486)
jQuery	1.4.2

Enabled Plugins

TracXMLRPC

0.1

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 513, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 235, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/tracrpc/web_ui.py", line 35, in process_request
    for method in XMLRPCSystem(self.env).all_methods(req):
  File "/usr/lib/python2.4/site-packages/tracrpc/api.py", line 178, in all_methods
    c = Method(provider, *candidate)
  File "/usr/lib/python2.4/site-packages/tracrpc/api.py", line 71, in __init__
    import pydoc
ImportError: No module named pydoc

[Remy Blank]

PluginIssue (​th:XmlRpcPlugin). But… the error message should be explicit enough, no?

[osimons]

Not strictly a plugin issue though… This certainly seems like an install issue with your ancient Python 2.4.3 (6 years old) running on Red Hat 4.1 (7 years old). As the ​pydoc docs say, this module has been shipped in Python standard lib since Python 2.1, and why it is not available to you I cannot say.

Lastly, and most most likely the quickest fix, is that your plugins lists 'TracXMLRPC 0.1' which is at least 5 years old and certainly cannot be expected to be compatible with the new-ish Trac 0.12 that you have installed. That version was made for Trac ⇐ 0.10.x.

Follow the plugin link, check the docs, and try again.

[Remy Blank]

Oh, somehow I managed to read "epydoc" instead of "pydoc", and wondered why it was needed in a component constructor. Sorry for the confusion.

[chaupv79@…]

Thank for your suggestion

I have solved that problem like below:

I moved the code:

import pydoc

to the top of file (/usr/lib/python2.4/site-packages/tracrpc/api.py)

and restart apache /etc/init.d/httpd restart

[osimons]

You would rather hack the old incompatible version and try to get it to work somehow, rather than update to the latest version that I've been working on for the last 5 years and is known to work fine with Trac 0.12? Current version is 1.1.2+ and is really what you should use too.

BTW, the import pydoc statement is no longer present anywhere in the plugin source code.

[Chau Pham]

Thank you a lot,

you are right, I move "import pydoc" to the top of file, that isn't a good solution for some reference, I have reinstall xmlrpc version 1.1.2 and it works fine.