upstream/ipython Files · IPython/utils/importstring.py

Backport PR : safe_run_module: Silence SystemExit codes 0 and None....

Backport PR : safe_run_module: Silence SystemExit codes 0 and None. In `safe_execfile` we ignore SystemExit exceptions with codes 0 and 1. We don't do this for `safe_run_module` which leads to the following mismatch of tracebacks between Python and IPython: ``` $ cat > exit0.py import sys sys.exit(0) $ python -m exit0 $ ipython -m exit0 --------------------------------------------------------------------------- SystemExit Traceback (most recent call last) /usr/lib/python2.7/runpy.pyc in run_module(mod_name, init_globals, run_name, alter_sys) 174 if alter_sys: 175 return _run_module_code(code, init_globals, run_name, --> 176 fname, loader, pkg_name) 177 else: 178 # Leave the sys module alone /usr/lib/python2.7/runpy.pyc in _run_module_code(code, init_globals, mod_name, mod_fname, mod_loader, pkg_name) 80 mod_globals = temp_module.module.__dict__ 81 _run_code(code, mod_globals, init_globals, ---> 82 mod_name, mod_fname, mod_loader, pkg_name) 83 # Copy the globals of the temporary module, as they 84 # may be cleared when the temporary module goes away /usr/lib/python2.7/runpy.pyc in _run_code(code, run_globals, init_globals, mod_name, mod_fname, mod_loader, pkg_name) 70 __loader__ = mod_loader, 71 __package__ = pkg_name) ---> 72 exec code in run_globals 73 return run_globals 74 /tmp/exit0.py in <module>() 1 import sys ----> 2 sys.exit(0) SystemExit: 0 WARNING: Unknown failure executing module: <exit0> ``` The attached pull request silences SystemExit exceptions with codes 0 and None.

Fernando Perez - - Load All Authors

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             importstring.py
        
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      # encoding: utf-8

      """

      A simple utility to import something by its string name.

      Authors:

      * Brian Granger

      """

      #-----------------------------------------------------------------------------

      #  Copyright (C) 2008-2011  The IPython Development Team

      #

      #  Distributed under the terms of the BSD License.  The full license is in

      #  the file COPYING, distributed as part of this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Functions and classes

      #-----------------------------------------------------------------------------

      def import_item(name):

          """Import and return bar given the string foo.bar."""

          package = '.'.join(name.split('.')[0:-1])

          obj = name.split('.')[-1]

          # Note: the original code for this was the following.  We've left it

          # visible for now in case the new implementation shows any problems down

          # the road, to make it easier on anyone looking for a problem.  This code

          # should be removed once we're comfortable we didn't break anything.

          ## execString = 'from %s import %s' % (package, obj)

          ## try:

          ##     exec execString

          ## except SyntaxError:

          ##     raise ImportError("Invalid class specification: %s" % name)

          ## exec 'temp = %s' % obj

          ## return temp

          if package:

              module = __import__(package,fromlist=[obj])

              try:

                  pak = module.__dict__[obj]

              except KeyError:

                  raise ImportError('No module named %s' % obj)

              return pak

          else:

              return __import__(obj)

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				# encoding: utf-8
				"""
				A simple utility to import something by its string name.

				Authors:

				* Brian Granger
				"""

				#-----------------------------------------------------------------------------
				# Copyright (C) 2008-2011 The IPython Development Team
				#
				# Distributed under the terms of the BSD License. The full license is in
				# the file COPYING, distributed as part of this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Functions and classes
				#-----------------------------------------------------------------------------

				def import_item(name):
				"""Import and return bar given the string foo.bar."""
				package = '.'.join(name.split('.')[0:-1])
				obj = name.split('.')[-1]

				# Note: the original code for this was the following. We've left it
				# visible for now in case the new implementation shows any problems down
				# the road, to make it easier on anyone looking for a problem. This code
				# should be removed once we're comfortable we didn't break anything.

				## execString = 'from %s import %s' % (package, obj)
				## try:
				## exec execString
				## except SyntaxError:
				## raise ImportError("Invalid class specification: %s" % name)
				## exec 'temp = %s' % obj
				## return temp

				if package:
				module = __import__(package,fromlist=[obj])
				try:
				pak = module.__dict__[obj]
				except KeyError:
				raise ImportError('No module named %s' % obj)
				return pak
				else:
				return __import__(obj)