I have several versions of Python installed on a Windows 7 computer.
I want to run Python 2.7 by default, but for whatever reason, typing python
in the command line runs Python version 2.4.5. I've tried adding C:\Python27
to my system path variable as per this question, and manually combed my path variable it to make sure Python 2.4.5 wasn't tossed in there by mistake, but that didn't fix the issue. I have to type in C:\Python27\python.exe
every time I want to access the correct version of python I want.
What other places can I check? How can I make the command line use the correct version of python?
I also found this but it's not for windows.
[EDIT]
My path (separated by semicolons):
C:\Program Files\Common Files\Microsoft Shared\Windows Live;
C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;
C:\Windows\system32;
C:\Windows;
C:\Windows\System32\Wbem;
C:\Windows\System32\WindowsPowerShell\v1.0\;
C:\Program Files\Dell\DW WLAN Card\Driver;
C:\Program Files (x86)\Common Files\Roxio Shared\DLLShared\;
C:\Program Files (x86)\Windows Live\Shared;
c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;
c:\Program Files\Microsoft SQL Server\100\Tools\Binn\;
c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;
C:\Program Files\TortoiseGit\bin;
C:\Program Files\Java\jdk1.6.0_26\bin;
C:\Program Files\Java\jdk1.6.0_21 ;
C:\Program Files\IVI Foundation\VISA\Win64\Bin\;
C:\Program Files (x86)\IVI Foundation\VISA\WinNT\Bin\;
C:\Program Files (x86)\IVI Foundation\VISA\WinNT\Bin;
C:\Program Files\WPIJavaCV\OpenCV_2.2.0\bin;
C:\Program Files (x86)\LilyPond\usr\bin;
C:\Program Files\TortoiseSVN\bin;
C:\Program Files (x86)\doxygen\bin;
C:\Program Files (x86)\Graphviz 2.28\bin;
C:\Users\Michael\bin\Misc\cppcheck\;
C:\Program Files (x86)\Git\cmd;
C:\Python27\python.exe;
C:\Ruby192\bin;
C:\Users\Michael\AppData\Roaming\cabal\bin;
C:\Python27\;
[EDIT 2]
Running python
spews this out:
'import site' failed; used -v for traceback
Python 2.4.5 (#1, Jul 22 2011, 02:01:04)
[GCC 4.1.1] on mingw32
Type "help", "copyright", "credits" or "license" for more information.
>>>
…and running python --version
(as suggested below) seems to be an unrecognized option.
(I also tried running python -v
, and it appears that Python 2.4 is trying to import libraries from C:\Python27\Lib
, and failed due to a syntax error when it encountered a with
statement, which was added in later version, I think)
Also, I'm not sure if it's significant or not, but the above python version says something about GCC and mingw32, while running C:\python27\python.exe
shows this:
Python 2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>>
Best Answer
While you're in a Python 2.4.5 session, use this to locate the Python.exe that gets picked up:
If you want to play with multiple versions, you cannot rely on %PATH%. Instead you could create separate batch files that call the version you want (make sure the batch files themselves are on the PATH though). For example, for 2.7.2 you could create a PY27.BAT that simply contains: