[issue22139] python windows 2.7.8 64-bit did not install

[Henning von Bargen]

Henning von Bargen added the comment:

Perhaps this issue should be re-opened.

I stumbled across a similar issue today, and made some potentially useful observations.

On a machine with an existing c:\python27 directory (Python 2.7.5), I installed Python 2.7.8 with the "install just for me" option into a new directory c:\python278.

That's because there are several Python-based applications running; and I want to restrict the new Python version to one of them.

The application uses a different executable, LisaReportingAgent.exe.

Within the same environment (PATH first entry is c:\python278), calling python.exe, listing sys.path gives the expected output:

C:\Lisa\Kronos\reporting\test\bin>c:\python278\python
Python 2.7.8 (default, Jun 30 2014, 16:03:49) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> for f in sys.path: print f
... 

C:\Lisa\Kronos\reporting\test
c:\python278\python27.zip
c:\python278\DLLs
c:\python278\lib
c:\python278\lib\plat-win
c:\python278\lib\lib-tk
c:\python278
c:\python278\lib\site-packages
c:\python278\lib\site-packages\win32
c:\python278\lib\site-packages\win32\lib
c:\python278\lib\site-packages\Pythonwin
>>> ^Z

Whereas the special executable's output is much different:

C:\Lisa\Kronos\reporting\test\bin>..\..\bin\win32-x86\LisaReportingAgent.exe
Python 2.7.5 (default, May 15 2013, 22:43:36) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> for f in sys.path: print f
...

C:\Lisa\Kronos\reporting\test
C:\WINDOWS\system32\python27.zip
C:\Python278\Lib
C:\Python278\DLLs
C:\Python278\Lib\lib-tk
C:\Python27\Lib
C:\Python27\DLLs
C:\Python27\Lib\lib-tk
C:\Lisa\Kronos\reporting\test\bin
C:\Lisa\Kronos\reporting\bin\win32-x86
C:\Python27
C:\Python27\lib\site-packages
C:\Python27\lib\site-packages\win32
C:\Python27\lib\site-packages\win32\lib
C:\Python27\lib\site-packages\Pythonwin
>>>

Note the entries with c:\windows and with the different Python installation C:\python27. They are pointing to the old Python installation.

The executable is built from the following C code (except for initializing a SWIG-generated Python wrapper for a PDF library):

int main( int argc, char* argv[] ) {
	int rc = 0;

        /* ... setup a license key ... */

	Py_SetProgramName(argv[0]);
	Py_Initialize();
    
        /* ... init PDF library ... */

        rc = Py_Main(argc, argv);
	Py_Finalize();

	/* ... shut down PDF library ... */

	return rc;
}

I've read something that Python 2.7 behaves differently on Windows regarding installation and setup in comparison to 2.6. It seems that the new python.exe performs registry magic?

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nosy: +Henning.von.Bargen

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<http://bugs.python.org/issue22139>
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