python exec2.original

Example Python program python-exec2.original.py

Modules

from future import with_statement
import os, os.path, sys
from epython import EPYTHON
import tokenize

Code

Python example

#!/usr/lib/python-exec/python-exec2-c
# vim:fileencoding=utf-8:ft=python
# (c) 2012 Michał Górny
# Released under the terms of the 2-clause BSD license.
#
# This is not the script you are looking for. This is just a wrapper.
# The actual scripts of this application were installed with -python*,
# -pypy* or -jython* suffixes. You are most likely looking for one
# of those.

from __future__ import with_statement
import os, os.path, sys

try:
        from epython import EPYTHON
except ImportError:
        EPYTHON = os.path.basename(sys.executable)
        if '' and EPYTHON.endswith(''):
                EPYTHON = EPYTHON[:-len('')]

# In the loop:
# sys.argv[0] keeps the 'bare' name
# __file__ keeps the 'full' name

while True:
        __file__ = os.path.join('/usr/lib/python-exec', EPYTHON,
                        os.path.basename(sys.argv[0]))

        try:
                kwargs = {}
                if sys.version_info[0] >= 3:
                        import tokenize

                        # need to provide encoding
                        with open(__file__, 'rb') as f:
                                kwargs['encoding'] = tokenize.detect_encoding(f.readline)[0]

                with open(__file__, 'r', **kwargs) as f:
                        data = f.read()
        except IOError:
                # follow symlinks (if supported)
                try:
                        sys.argv[0] = os.path.join(os.path.dirname(sys.argv[0]),
                                        os.readlink(sys.argv[0]))
                except (OSError, AttributeError):
                        # no more symlinks? then it's time to fail.
                        sys.stderr.write('This Python implementation (%s) is not supported by the script.\n'
                                        % EPYTHON)
                        sys.exit(127)
        else:
                break

sys.argv[0] = __file__
exec(data)

Useful Links

Articles: https://python-commandments.org/
Python shell: https://bsdnerds.org/learn-python/
Tutorial: https://pythonprogramminglanguage.com/