maintain 2 versions of python on my computer

[Alf P. Steinbach]

* Aahz:
> In article <Xns9D02B5E2CD9B1duncanbooth at 127.0.0.1>,
> Duncan Booth  <duncan.booth at suttoncourtenay.org.uk> wrote:
>> That seems overkill. This does pretty much the same thing:
>>
>>    	@(C:\Python26\Python -x %~f0 %* || pause) && goto:EOF
>>    	import sys
>>    	print sys.version
>>    	# raise RuntimeError # uncomment to trigger the 'pause'
> 
> <blink>  What version of Windows is necessary to use this?  Anything with
> cmd.exe?  (Sure doesn't look anything like DOS batch files...)

Well, all of that has been there since, I don't know, long ago...

-x A Python option that skips the first line of the script.
@  suppresses echo of the line.
() group commands (creates a compound command)
|| shortcut-evaluated OR
&& shortcut-evaluated AND
%  see below...


C:\test> for /? | find "%~"
     %~I         - expands %I removing any surrounding quotes (")
     %~fI        - expands %I to a fully qualified path name
     %~dI        - expands %I to a drive letter only
     %~pI        - expands %I to a path only
     %~nI        - expands %I to a file name only
     %~xI        - expands %I to a file extension only
     %~sI        - expanded path contains short names only
     %~aI        - expands %I to file attributes of file
     %~tI        - expands %I to date/time of file
     %~zI        - expands %I to size of file
     %~$PATH:I   - searches the directories listed in the PATH
     %~dpI       - expands %I to a drive letter and path only
     %~nxI       - expands %I to a file name and extension only
     %~fsI       - expands %I to a full path name with short names only
     %~dp$PATH:I - searches the directories listed in the PATH
     %~ftzaI     - expands %I to a DIR like output line
values.  The %~ syntax is terminated by a valid FOR variable name.

C:\test> _

Cheers & hth. (even if a bit off-topic!),


- Alf