64 bit python installation issues on 64 bit Windows 7

After installing 64 bit Windows 7 at work, I got a problem of installing many python utilities that search for installed python locations is windows registry. distutils (setuptools-0.6c11.win32-py2.6.exe) still could not find 64 bit python installation, as well as develer's Unofficial MinGW GCC binaries for Windows (I still do not have a solution for that one :( ).

Actually, what helped me with disttools, was a http://www.mail-archive.com/distutils-sig@python.org/msg10512.html group thread. The currently available 64 bit python installation is registering python in a new location in windows registry. So one have to use a modified script for registering python the old way:

# script to register Python 2.0 or later for use with win32all
# and other extensions that require Python registry settings
# written by Joakim Loew for Secret Labs AB / PythonWare
# source:
# http://www.pythonware.com/products/works/articles/regpy20.htm
# modified by Valentine Gogichashvili as described in http://www.mail-archive.com/distutils-sig@python.org/msg10512.html

import sys

from _winreg import *

# tweak as necessary
version = sys.version[:3]
installpath = sys.prefix

regpath = "SOFTWARE\\Python\\Pythoncore\\%s\\" % (version)
installkey = "InstallPath"
pythonkey = "PythonPath"
pythonpath = "%s;%s\\Lib\\;%s\\DLLs\\" % (
    installpath, installpath, installpath

def RegisterPy():
        reg = OpenKey(HKEY_CURRENT_USER, regpath)
    except EnvironmentError as e:
            reg = CreateKey(HKEY_CURRENT_USER, regpath)
            SetValue(reg, installkey, REG_SZ, installpath)
            SetValue(reg, pythonkey, REG_SZ, pythonpath)
            print "*** Unable to register!"
        print "--- Python", version, "is now registered!"
    if (QueryValue(reg, installkey) == installpath and
        QueryValue(reg, pythonkey) == pythonpath):
        print "=== Python", version, "is already registered!"
    print "*** Unable to register!"
    print "*** You probably have another Python installation!"

if __name__ == "__main__":

or just inject the following REG file into your registry if you are using python 2.6 installed in C:\Python26 directory

Windows Registry Editor Version 5.00







sfletche said...

was having some problems installing psycopg for postgres/postgis. used the registry contents that you posted above and it appears this saved me from having to reinstall python as 32-bit on my 64-bit windows 7 machine. thanks for the post!

Unknown said...

yep, thanks :)

Anonymous said...

It worked for me too (installing PIL). Thank you so much.

Unknown said...

Added those lines to a txt file then changed to a .reg file and merged to the registry and it worked for me too!

Unknown said...

The problem is the pywin32 is a 32 bit installer, it will look for the Python reg entries in the Wow6432Node, the following .reg file will add the entries, ensure the paths are correct for your install.

Tested with Windows 7 x64 and python 3.2.

Windows Registry Editor Version 5.00





[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Python\PythonCore\3.2\Help\Main Python Documentation]


@="Python 3.2"



Dima Basavin said...

thanks a lot! it worked
(had a problem with pysqlite for python27)

maGo! said...

Thank you, worked like a charm, installed pywin32

Galal said...

Thanks a lot. =D

Jennifer said...
This comment has been removed by the author.
Jamie Faye Fenton said...

I used RegEdt32 and went into the HKEY_LOCAL_MACHINE hive, selected the python key, and used the export command to create a file I called pyreg.reg. This made a file similar to the one shown in the comment. I then replaced all references to HKEY_LOCAL_MACHINE with HKEY_CURRENT_USER (in NotePad), and saved the result as pyreg1.reg. I then executed on the cmd line:

regedt32 pyreg1.reg

(The effect of doing this is to capture the exact version of Python you have installed, including any changes to the registry layout it has).

Juan Pablo said...

Thank you! that worked for me!

Andrey Gannochka said...

Thank you very much! (Problem with Mabot installation has been fixed.)

Unknown said...

Used the .reg method, worked like a charm for Python27.

Thanks a lot!

Unknown said...

thx man i got so many solution , but just your are perfect
thx a lot

Anonymous said...

Thanks for this page on what to fill in for registry. It was strange though that 2.6 and 2.7 registered properly and 3.3 did not. I'm not sure if python is like Visual Studio where you have to have them in the proper order but I tried my best to do that.

Alex Irae said...

It workeeeed!

CTorres said...

you are an angel

chidambaram said...

Thank you may you live forever and continue the work forever.

Unknown said...

You saved my day!!

Anthony said...

Prevented me from having to do this manually; thus, very useful, and much appreciated.

Unknown said...

Thank you very much for the post. Helped a lot.

Alvin Paul said...

The solution is working on my PC. I also have windows 7 and suffers the same problem with it.


Unknown said...

Thank you, it worked for solving "unable register" problem when installing psycopg for postgres.

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