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Backport PR #2924: safe_run_module: Silence SystemExit codes 0 and None....
Backport PR #2924: 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.
Matthias BUSSONNIER - - Load All Authors

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warn.py
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/ IPython / utils / warn.py
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# encoding: utf-8
"""
Utilities for warnings. Shoudn't we just use the built in warnings module.
"""
#-----------------------------------------------------------------------------
# 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.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import sys
from IPython.utils import io
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
def warn(msg,level=2,exit_val=1):
"""Standard warning printer. Gives formatting consistency.
Output is sent to io.stderr (sys.stderr by default).
Options:
-level(2): allows finer control:
0 -> Do nothing, dummy function.
1 -> Print message.
2 -> Print 'WARNING:' + message. (Default level).
3 -> Print 'ERROR:' + message.
4 -> Print 'FATAL ERROR:' + message and trigger a sys.exit(exit_val).
-exit_val (1): exit value returned by sys.exit() for a level 4
warning. Ignored for all other levels."""
if level>0:
header = ['','','WARNING: ','ERROR: ','FATAL ERROR: ']
io.stderr.write('%s%s' % (header[level],msg))
if level == 4:
print >> io.stderr,'Exiting.\n'
sys.exit(exit_val)
def info(msg):
"""Equivalent to warn(msg,level=1)."""
warn(msg,level=1)
def error(msg):
"""Equivalent to warn(msg,level=3)."""
warn(msg,level=3)
def fatal(msg,exit_val=1):
"""Equivalent to warn(msg,exit_val=exit_val,level=4)."""
warn(msg,exit_val=exit_val,level=4)