is this a familiar error for folks? hoping to maybe to the stack trace from ‘/usr/local/bin/python’

i’m trying to think of how to reproduce this with pex alone, because it seems like that error you’ve mentioned shouldn’t be happening

If you read that very literally, it looks like a configuration issue: while trying to execute

['/usr/local/bin/python']

That says PEX is trying to execute a path that looks like a python singleton array literal. Are there relevant bits of your pants.ini this calls to mind that you could paste?

Yes they execute fine

OK. Can you try applying this diff?

diff --git a/pex/interpreter.py b/pex/interpreter.py
index db8760a..130a3ed 100644
--- a/pex/interpreter.py
+++ b/pex/interpreter.py
@@ -320,8 +320,12 @@ class PythonInterpreter(object):
       for fn in cls.expand_path(path):
         basefile = os.path.basename(fn)
         if hashbang == basefile:
+          from pex.executor import Executor
           try:
             return cls.from_binary(fn)
+          except Executor.NonZeroExit as e:
+            TRACER.log('Could not identify %s: %s\nSTDOUT:\n%s\nSTDERR:\n%s'
+                       % (fn, e, e.stdout, e.stderr))
           except Exception as e:
             TRACER.log('Could not identify %s: %s' % (fn, e))

ok I managed to fix the problem by completely cleaning out my brew pythons (+ packages) and reinstalling. I was getting the following issue when running `pip freeze`:

pip freeze
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Could not parse requirement: -sycopg2
Could not parse requirement: -orchfile
Could not parse requirement: -
absl-py==0.7.0
agate==1.6.1
agate-dbf==0.2.0
agate-excel==0.2.2
agate-sql==0.5.3
alembic==0.8.10
ansicolors==1.0.2

So something seemed to have gone wrong with my pythons

OK. I did just file https://github.com/pantsbuild/pex/issues/689 to give better logging for this sort of case going forward.