fixed installed command.

pythonbrew/commands/installed.py

@@ -1,8 +1,9 @@
 import os
+import sys
+from subprocess import Popen, PIPE
 from pythonbrew.basecommand import Command
 from pythonbrew.define import PATH_PYTHONS
 from pythonbrew.log import logger
-import sys
 
 class InstalledCommand(Command):
     name = "installed"
@@ -10,10 +11,12 @@ class InstalledCommand(Command):
     summary = "List the installed versions of python"
     
     def run_command(self, options, args):
-        cur = ""
-        
+        cur = None
         if not os.path.islink("%s/current" % PATH_PYTHONS):
-            logger.info("%s (*)" % sys.executable)
+            p = Popen('command -v python', stdout=PIPE, shell=True)
+            p.wait()
+            if p.returncode == 0:
+                logger.info("%s (*)" % p.stdout.read().strip())
         elif os.path.islink("%s/current" % PATH_PYTHONS):
             cur = os.path.basename(os.path.realpath("%s/current" % PATH_PYTHONS))
         for d in sorted(os.listdir("%s/" % PATH_PYTHONS)):