"[EMAIL PROTECTED]" wrote:
> I've got a trouble, and i think that anybody there can help me
>
> I've got a python script which i distribute in somes packages for *nix.
> This script is full of python and need python 2.4 ! And i'd like to
> display a message when the user doesn't have a python2.4 version.
> I'd like to make my script (or a starter script)
> which will be able to detect all python versions of the machine. And
> run my script with the good one ; py2.4, or display a message to the
> user to say her it must install py2.4 ...
the approach used in bzr might work for you:
#
# application boot script
import os, sys
try:
version_info = sys.version_info
except AttributeError:
version_info = 1, 5 # 1.5 or older
REINVOKE = "__MYAPP_REINVOKE"
NEED_VERS = (2, 4)
KNOWN_PYTHONS = ('python2.4',)
if version_info < NEED_VERS:
if not os.environ.has_key(REINVOKE):
# mutating os.environ doesn't work in old Pythons
os.putenv(REINVOKE, "1")
for python in KNOWN_PYTHONS:
try:
os.execvp(python, [python] + sys.argv)
except OSError:
pass
print >>sys.stderr, "error: cannot find a suitable python interpreter"
print >>sys.stderr, " (need %d.%d or later)" % NEED_VERS
sys.exit(1)
if hasattr(os, "unsetenv"):
os.unsetenv(REINVOKE)
#
# get things going!
import myapp
myapp.run()
# end of boot script
(the actual bzr source is shipped under the GPL, but 1) it's trivial, and 2) I
contributed
the code in the first place, so I'd say it's safe to "steal this code" ;-)
</F>
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