mpz's doc says "This module will be removed in 
Python 2.3" but Python 2.3 has been released, so it 
should read:
"This module has been removed in Python 2.3"


Python 2.3.2 (#1, Oct  9 2003, 12:03:29)
Type "help", "copyright", "credits" or "license" for 
more information.
>>> import mpz
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named mpz

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I believe the patch is incorrect; the module is still
available. The fact that you don't have it probably
originates from the fact that you don't have gmp build
environment.

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Following your advice, I revised the previous patch.
* remove the obscure part
  (This module will be removed in Python 2.3.)
* add the version infomation to the availability of the 
module
  (use \versionchanged tag)

I guess this is clearer what has changed since 2.3.
The change is as follows:

 Deprecated since release 2.2. See the references at the 
end of this section for information about packages which 
provide similar functionality. This module will be 
removed in Python 2.3.
 This is an optional module. It is only available when 
Python is configured to include it, which requires that 
the GNU MP software is installed. 

--> patch applied

 Deprecated since release 2.2. See the references at the 
end of this section for information about packages which 
provide similar functionality. 
 Changed in version 2.3: This is an optional module. It is 
only available when Python is configured to include it, 
which requires that the GNU MP software is installed.


Thanks.

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Closing: mpz and libmpz are gone now.