def print_exception(type=None, value=None, tb=None, limit=None):
if type is None:
type, value, tb = sys.exc_info()
import traceback
print
print "<H3>Traceback (most recent call last):</H3>"
list = traceback.format_tb(tb, limit) + \
traceback.format_exception_only(type, value)
print "<PRE>%s<B>%s</B></PRE>" % (
escape("".join(list[:-1])),
escape(list[-1]),
)
del tb
python类format_exception_only()的实例源码
def showsyntaxerror(self, filename=None):
"""Display the syntax error that just occurred.
This doesn't display a stack trace because there isn't one.
If a filename is given, it is stuffed in the exception instead
of what was there before (because Python's parser always uses
"<string>" when reading from a string).
The output is written by self.write(), below.
"""
type, value, sys.last_traceback = sys.exc_info()
sys.last_type = type
sys.last_value = value
if filename and type is SyntaxError:
# Work hard to stuff the correct filename in the exception
try:
msg, (dummy_filename, lineno, offset, line) = value
except:
# Not the format we expect; leave it alone
pass
else:
# Stuff in the right filename
value = SyntaxError(msg, (filename, lineno, offset, line))
sys.last_value = value
list = traceback.format_exception_only(type, value)
map(self.write, list)
def showtraceback(self):
"""Display the exception that just occurred.
We remove the first stack item because it is our own code.
The output is written by self.write(), below.
"""
try:
type, value, tb = sys.exc_info()
sys.last_type = type
sys.last_value = value
sys.last_traceback = tb
tblist = traceback.extract_tb(tb)
del tblist[:1]
list = traceback.format_list(tblist)
if list:
list.insert(0, "Traceback (most recent call last):\n")
list[len(list):] = traceback.format_exception_only(type, value)
finally:
tblist = tb = None
map(self.write, list)
def __init__(self, exc_type, exc_value, file, msg=''):
exc_type_name = exc_type.__name__
if exc_type is SyntaxError:
tbtext = ''.join(traceback.format_exception_only(exc_type, exc_value))
errmsg = tbtext.replace('File "<string>"', 'File "%s"' % file)
else:
errmsg = "Sorry: %s: %s" % (exc_type_name,exc_value)
Exception.__init__(self,msg or errmsg,exc_type_name,exc_value,file)
self.exc_type_name = exc_type_name
self.exc_value = exc_value
self.file = file
self.msg = msg or errmsg
def exception(self, message=None):
"Log an exception as an error and debug if we're doing that."
extype, ex, tb = sys.exc_info()
message = "Exception: %s%s%s" % (
message + ': ' if message is not None else '',
''.join(traceback.format_exception_only(extype, ex)),
''.join(traceback.format_exception(extype, ex, tb)).strip()
)
if self.forced_debug:
self.debug(message)
else:
self.error(message)
# Forced setting of debug level
def exceptionHandler(self, excType, exc, tb):
if self.ui.catchNextExceptionBtn.isChecked():
self.ui.catchNextExceptionBtn.setChecked(False)
elif not self.ui.catchAllExceptionsBtn.isChecked():
return
self.ui.clearExceptionBtn.setEnabled(True)
self.currentTraceback = tb
excMessage = ''.join(traceback.format_exception_only(excType, exc))
self.ui.exceptionInfoLabel.setText(excMessage)
self.ui.exceptionStackList.clear()
for index, line in enumerate(traceback.extract_tb(tb)):
self.ui.exceptionStackList.addItem('File "%s", line %s, in %s()\n %s' % line)
def exceptionHandler(self, excType, exc, tb):
if self.ui.catchNextExceptionBtn.isChecked():
self.ui.catchNextExceptionBtn.setChecked(False)
elif not self.ui.catchAllExceptionsBtn.isChecked():
return
self.ui.clearExceptionBtn.setEnabled(True)
self.currentTraceback = tb
excMessage = ''.join(traceback.format_exception_only(excType, exc))
self.ui.exceptionInfoLabel.setText(excMessage)
self.ui.exceptionStackList.clear()
for index, line in enumerate(traceback.extract_tb(tb)):
self.ui.exceptionStackList.addItem('File "%s", line %s, in %s()\n %s' % line)
def exception(self):
"""String representation of the exception."""
buf = traceback.format_exception_only(self.exc_type, self.exc_value)
rv = ''.join(buf).strip()
return rv.decode('utf-8', 'replace') if PY2 else rv
def fallback_repr(self):
try:
info = ''.join(format_exception_only(*sys.exc_info()[:2]))
except Exception: # pragma: no cover
info = '?'
if PY2:
info = info.decode('utf-8', 'ignore')
return u'<span class="brokenrepr"><broken repr (%s)>' \
u'</span>' % escape(info.strip())
def test():
"Run a simple demo that shows evaluator's capability."
from sys import exc_info, stderr
from traceback import format_exception_only
local = {}
while True:
try:
evaluate(input('>>> '), local)
except EOFError:
break
except:
stderr.write(format_exception_only(*exc_info()[:2])[-1])
def exception(self):
"""String representation of the exception."""
buf = traceback.format_exception_only(self.exc_type, self.exc_value)
rv = ''.join(buf).strip()
return rv.decode('utf-8', 'replace') if PY2 else rv
def fallback_repr(self):
try:
info = ''.join(format_exception_only(*sys.exc_info()[:2]))
except Exception: # pragma: no cover
info = '?'
if PY2:
info = info.decode('utf-8', 'ignore')
return u'<span class="brokenrepr"><broken repr (%s)>' \
u'</span>' % escape(info.strip())
def format_exception(self):
"""
Return the same data as from traceback.format_exception.
"""
import traceback
frames = self.get_traceback_frames()
tb = [(f['filename'], f['lineno'], f['function'], f['context_line']) for f in frames]
list = ['Traceback (most recent call last):\n']
list += traceback.format_list(tb)
list += traceback.format_exception_only(self.exc_type, self.exc_value)
return list
def exception(self):
"""String representation of the exception."""
buf = traceback.format_exception_only(self.exc_type, self.exc_value)
rv = ''.join(buf).strip()
return rv.decode('utf-8', 'replace') if PY2 else rv
def fallback_repr(self):
try:
info = ''.join(format_exception_only(*sys.exc_info()[:2]))
except Exception: # pragma: no cover
info = '?'
if PY2:
info = info.decode('utf-8', 'ignore')
return u'<span class="brokenrepr"><broken repr (%s)>' \
u'</span>' % escape(info.strip())
def exconly(self, tryshort=False):
""" return the exception as a string
when 'tryshort' resolves to True, and the exception is a
py.code._AssertionError, only the actual exception part of
the exception representation is returned (so 'AssertionError: ' is
removed from the beginning)
"""
lines = format_exception_only(self.type, self.value)
text = ''.join(lines)
text = text.rstrip()
if tryshort:
if text.startswith(self._striptext):
text = text[len(self._striptext):]
return text
def codeInput(self, text):
methodName = 'do'
if text[0] == '/':
split = string.split(text[1:],' ',1)
statement = split[0]
if len(split) == 2:
remainder = split[1]
if statement in ('browse', 'explore'):
methodName = 'explore'
text = remainder
elif statement == 'watch':
methodName = 'watch'
text = remainder
elif statement == 'self_rebuild':
rebuild.rebuild(explorer)
if _GNOME_POWER:
rebuild.rebuild(spelunk_gnome)
rebuild.rebuild(sys.modules[__name__])
return
try:
self.perspective.callRemote(methodName, text)
except pb.ProtocolError:
# ASSUMPTION: pb.ProtocolError means we lost our connection.
(eType, eVal, tb) = sys.exc_info()
del tb
s = string.join(traceback.format_exception_only(eType, eVal),
'')
self.connectionLost(s)
except:
traceback.print_exc()
gtk.mainquit()
def _failureOldStyle(fail):
"""Pre-Failure manhole representation of exceptions.
For compatibility with manhole clients without the \"Failure\"
capability.
A dictionary with two members:
- \'traceback\' -- traceback.extract_tb output; a list of tuples
(filename, line number, function name, text) suitable for
feeding to traceback.format_list.
- \'exception\' -- a list of one or more strings, each
ending in a newline. (traceback.format_exception_only output)
"""
import linecache
tb = []
for f in fail.frames:
# (filename, line number, function name, text)
tb.append((f[1], f[2], f[0], linecache.getline(f[1], f[2])))
return {
'traceback': tb,
'exception': traceback.format_exception_only(fail.type, fail.value)
}
# Capabilities clients are likely to have before they knew how to answer a
# "listCapabilities" query.
def istrue(self):
try:
return self._istrue()
except Exception:
self.exc = sys.exc_info()
if isinstance(self.exc[1], SyntaxError):
msg = [" " * (self.exc[1].offset + 4) + "^",]
msg.append("SyntaxError: invalid syntax")
else:
msg = traceback.format_exception_only(*self.exc[:2])
pytest.fail("Error evaluating %r expression\n"
" %s\n"
"%s"
%(self.name, self.expr, "\n".join(msg)),
pytrace=False)
def showsyntaxerror(self, filename=None):
"""Display the syntax error that just occurred.
This doesn't display a stack trace because there isn't one.
If a filename is given, it is stuffed in the exception instead
of what was there before (because Python's parser always uses
"<string>" when reading from a string).
The output is written by self.write(), below.
"""
type, value, sys.last_traceback = sys.exc_info()
sys.last_type = type
sys.last_value = value
if filename and type is SyntaxError:
# Work hard to stuff the correct filename in the exception
try:
msg, (dummy_filename, lineno, offset, line) = value
except:
# Not the format we expect; leave it alone
pass
else:
# Stuff in the right filename
value = SyntaxError(msg, (filename, lineno, offset, line))
sys.last_value = value
list = traceback.format_exception_only(type, value)
map(self.write, list)
