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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)
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