Pysvn installer fails to detect Python installation

Question

I have Python 2.7.2 installed in the default location, C:\Python27. I've downloaded pysvn 2.7 from http://pysvn.tigris.org/project_downloads.html > Windows installation kits. Pysvn Windows installer aborts on

pysvn requires Python 2.7 to be installed.

Quitting installation

I've tried both installer files, py27-pysvn-svn1612-1.7.4-1321.exe and py27-pysvn-svn1615-1.7.5-1360.exe. Neither of them works.

How can I convince the installer that I have Python 2.7 installed? How is the installer determining whether pysvn is installed or not?

Are you able to access Python by opening up the command prompt and typing "python"? — Robert, Jan 20 '12 at 13:45
Does the installer show any details during the installation that could help troubleshoot why its not finding it? — Robert, Jan 20 '12 at 14:26
Nope, the described error message is the first and only indication of failure. — Juuso Ohtonen, Jan 20 '12 at 15:43

score 8 · Accepted Answer · answered Jan 23 '12 at 17:01

8

Did u perhaps install the 64-bit version of Python? If yes: Try the 32-bit installer.

Background: It seems like the 64-bit installer doesn't properly set the correct values in the windows registry (which is the place where PySVN tries to find Python).

answered Jan 23 '12 at 17:01

Andreas

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I reinstalled Python 2.7, now as a 32-bit version. After that Pysvn installation works like a charm. – Juuso Ohtonen Jan 24 '12 at 05:05
@Andreas Yes, that is the case. However I need python in 64 bits. Can I install pysvn with 64 bits python? – Pedro Reis Apr 01 '14 at 16:43

pioniere · Answer 2 · 2012-11-29T17:14:03.770

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I tried this and it worked perfectly:

Copy HKLM\SOFTWARE\Python\PythonCore\2.7\InstallPath to HKCU\SOFTWARE\Python\PythonCore\2.7\InstallPath.

Same link as above, but a different solution is offered within the thread. It is a problem with the pysvn 32-bit installer looking in the wrong (?) place in the Registry for the installed Python version.

Edit: The 32-bit module still didn't work correctly with the 64-bit Python. The only solution for this is to use 32-bit Python with the module.

edited Nov 29 '12 at 17:14

answered Nov 29 '12 at 00:15

pioniere

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Thanks. Saved me a bit of trouble. – Randolph Jul 12 '13 at 23:17

score 1 · Answer 3 · answered Jun 04 '12 at 22:27

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Another option is to copy the the registry keys from HKEY_LOCAL_MACHINE\SOFTWARE\Python to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Python

http://pysvn.tigris.org/ds/viewMessage.do?dsForumId=1335&viewType=browseAll&dsMessageId=2719385

answered Jun 04 '12 at 22:27

Gabriel

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I tried this approach with PIL. I ran into some serious error messages when trying to load the Image library. Finally, I replaced Python 64-bit installation with the 32-bit one. After that, PIL worked just fine. – Juuso Ohtonen Jun 16 '12 at 11:39
Most likely the pysvn binaries are built for 32-bit Python and so this solution, while getting you past the "can't find Python problem" will be DOA when you try to actually use pysvn. – Craig Wright Dec 27 '12 at 22:23

score 0 · Answer 4 · answered Aug 22 '17 at 19:07

My case was a bit different. Since my Anaconda install was for Python 3.6, no matter what I did I wasn't able to install PySvn (never got detected).

So since PySvn last release is for Python 3.5, I've created a conda env for Python 3.5.

Open Anaconda prompt and type: conda create -n *myenv* python=3.5

Then, open the win prompt and type regedit.

In regedit, under HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\ I changed the name of the folder from 3.6 to 3.5. Additionally, in HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\3.5\InstallPath I changed the value of Anaconda's default folder to my Anaconda's env folder (C:\ProgramData\Anaconda3\env\*myenv*).

Then I ran the installed and it worked fined. After installed, I remade the changes in the system registry to the original ones.

Now I can import Pysvn, inside my conda env, without any problems.

Pysvn installer fails to detect Python installation

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