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warnings.pyc
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.txt
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2004-02-22
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# Source Generated with Decompyle++
# File: in.pyc (Python 2.3)
'''Python part of the warnings subsystem.'''
import sys
import types
import linecache
__all__ = [
'warn',
'showwarning',
'formatwarning',
'filterwarnings',
'resetwarnings']
filters = []
defaultaction = 'default'
onceregistry = { }
def warn(message, category = None, stacklevel = 1):
'''Issue a warning, or maybe ignore it or raise an exception.'''
if isinstance(message, Warning):
category = message.__class__
if category is None:
category = UserWarning
if not issubclass(category, Warning):
raise AssertionError
try:
caller = sys._getframe(stacklevel)
except ValueError:
globals = sys.__dict__
lineno = 1
globals = caller.f_globals
lineno = caller.f_lineno
if '__name__' in globals:
module = globals['__name__']
else:
module = '<string>'
filename = globals.get('__file__')
if filename:
fnl = filename.lower()
if fnl.endswith('.pyc') or fnl.endswith('.pyo'):
filename = filename[:-1]
elif module == '__main__':
filename = sys.argv[0]
if not filename:
filename = module
registry = globals.setdefault('__warningregistry__', { })
warn_explicit(message, category, filename, lineno, module, registry)
def warn_explicit(message, category, filename, lineno, module = None, registry = None):
if module is None:
module = filename
if module[-3:].lower() == '.py':
module = module[:-3]
if registry is None:
registry = { }
if isinstance(message, Warning):
text = str(message)
category = message.__class__
else:
text = message
message = category(message)
key = (text, category, lineno)
if registry.get(key):
return None
for item in filters:
(action, msg, cat, mod, ln) = item
if (msg is None or msg.match(text)) and issubclass(category, cat):
if (msg is None or mod.match(module)) and ln == 0 or lineno == ln:
break
continue
else:
action = defaultaction
if action == 'ignore':
registry[key] = 1
return None
if action == 'error':
raise message
if action == 'once':
registry[key] = 1
oncekey = (text, category)
if onceregistry.get(oncekey):
return None
onceregistry[oncekey] = 1
elif action == 'always':
pass
elif action == 'module':
registry[key] = 1
altkey = (text, category, 0)
if registry.get(altkey):
return None
registry[altkey] = 1
elif action == 'default':
registry[key] = 1
else:
raise RuntimeError('Unrecognized action (%s) in warnings.filters:\n %s' % (`action`, str(item)))
showwarning(message, category, filename, lineno)
def showwarning(message, category, filename, lineno, file = None):
'''Hook to write a warning to a file; replace if you like.'''
if file is None:
file = sys.stderr
try:
file.write(formatwarning(message, category, filename, lineno))
except IOError:
pass
def formatwarning(message, category, filename, lineno):
'''Function to format a warning the standard way.'''
s = '%s:%s: %s: %s\n' % (filename, lineno, category.__name__, message)
line = linecache.getline(filename, lineno).strip()
if line:
s = s + ' ' + line + '\n'
return s
def filterwarnings(action, message = '', category = Warning, module = '', lineno = 0, append = 0):
'''Insert an entry into the list of warnings filters (at the front).
Use assertions to check that all arguments have the right type.'''
import re
if not action in ('error', 'ignore', 'always', 'default', 'module', 'once'):
raise AssertionError, 'invalid action: %s' % `action`
if not isinstance(message, basestring):
raise AssertionError, 'message must be a string'
if not isinstance(category, types.ClassType):
raise AssertionError, 'category must be a class'
if not issubclass(category, Warning):
raise AssertionError, 'category must be a Warning subclass'
if not isinstance(module, basestring):
raise AssertionError, 'module must be a string'
if not isinstance(lineno, int) and lineno >= 0:
raise AssertionError, 'lineno must be an int >= 0'
item = (action, re.compile(message, re.I), category, re.compile(module), lineno)
if append:
filters.append(item)
else:
filters.insert(0, item)
def simplefilter(action, category = Warning, lineno = 0, append = 0):
'''Insert a simple entry into the list of warnings filters (at the front).
A simple filter matches all modules and messages.
'''
if not action in ('error', 'ignore', 'always', 'default', 'module', 'once'):
raise AssertionError, 'invalid action: %s' % `action`
if not isinstance(lineno, int) and lineno >= 0:
raise AssertionError, 'lineno must be an int >= 0'
item = (action, None, category, None, lineno)
if append:
filters.append(item)
else:
filters.insert(0, item)
def resetwarnings():
'''Clear the list of warning filters, so that no filters are active.'''
filters[:] = []
class _OptionError(Exception):
'''Exception used by option processing helpers.'''
pass
def _processoptions(args):
for arg in args:
try:
_setoption(arg)
continue
except _OptionError:
msg = None
print >>sys.stderr, 'Invalid -W option ignored:', msg
continue
def _setoption(arg):
import re
parts = arg.split(':')
if len(parts) > 5:
raise _OptionError('too many fields (max 5): %s' % `arg`)
while len(parts) < 5:
parts.append('')
(action, message, category, module, lineno) = [ s.strip() for s in parts ]
action = _getaction(action)
message = re.escape(message)
category = _getcategory(category)
module = re.escape(module)
if lineno:
try:
lineno = int(lineno)
if lineno < 0:
raise ValueError
except (ValueError, OverflowError):
None if module else []
None if module else []
raise _OptionError('invalid lineno %s' % `lineno`)
except:
None if module else []<EXCEPTION MATCH>(ValueError, OverflowError)
None if module else []
lineno = 0
filterwarnings(action, message, category, module, lineno)
def _getaction(action):
if not action:
return 'default'
if action == 'all':
return 'always'
for a in [
'default',
'always',
'ignore',
'module',
'once',
'error']:
if a.startswith(action):
return a
continue
raise _OptionError('invalid action: %s' % `action`)
def _getcategory(category):
import re
if not category:
return Warning
if re.match('^[a-zA-Z0-9_]+$', category):
try:
cat = eval(category)
except NameError:
raise _OptionError('unknown warning category: %s' % `category`)
except:
None<EXCEPTION MATCH>NameError
None<EXCEPTION MATCH>NameError
i = category.rfind('.')
module = category[:i]
klass = category[i + 1:]
try:
m = __import__(module, None, None, [
klass])
except ImportError:
raise _OptionError('invalid module name: %s' % `module`)
try:
cat = getattr(m, klass)
except AttributeError:
raise _OptionError('unknown warning category: %s' % `category`)
if not isinstance(cat, types.ClassType) or not issubclass(cat, Warning):
raise _OptionError('invalid warning category: %s' % `category`)
return cat
if __name__ == '__main__':
import __main__
sys.modules['warnings'] = __main__
_test()
else:
_processoptions(sys.warnoptions)
simplefilter('ignore', category = OverflowWarning, append = 1)
simplefilter('ignore', category = PendingDeprecationWarning, append = 1)