[Twisted-Python] installing pyOpenSSL on Centos6 help

exarkun at twistedmatrix.com exarkun at twistedmatrix.com
Tue Feb 14 09:41:44 EST 2012

On 13 Feb, 07:54 pm, tom.sheffler at gmail.com wrote:
>After performing a straight-forward install of pyOpenSSL I am getting 
>following strange import error.  Suggestions appreciated!
># python
>Python 2.6.6 (r266:84292, Dec  7 2011, 20:38:36)
>[GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] on linux2
>Type "help", "copyright", "credits" or "license" for more information.
>>>>import OpenSSL
>Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File "OpenSSL/__init__.py", line 40, in <module>
>    from OpenSSL import crypto
>ImportError: cannot import name crypto

Notice that the complaint is about "OpenSSL/__init__.py" instead of 
something more sensible like "/usr/lib/python2.6/site- 

You're probably testing this using a working directory inside the 
pyOpenSSL source directory, and thus getting the wrong version of the 
OpenSSL package (one that does not include the built extension modules).

Try testing in a different directory - or build the extension modules 
in-place using the -i option to distutils' build_ext command.

If this doesn't solve the problem, consider asking in a forum dedicated 
to CentOS 6 or pyOpenSSL, since the issue isn't really based on any 
software or other materials from the Twisted project.  Also, include 
more information when you do so, for example a full installation 
transcript and a manifest of installed files, otherwise it's not likely 
anyone will be able to provide a better answer.


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