def format_exception(bfn, ex):
import traceback, linecache
exinfo = traceback.format_exception_only(ex.__class__, ex)
if ex.__class__ == SyntaxError:
exinfo = exinfo[1:]
lineno = ex.lineno
content = ''
sys.stderr.write('Error while processing %s:%s\n\t%s\n' % (os.path.abspath(bfn), lineno, content.strip()))
else:
exec_line = None
exloc = traceback.extract_tb(sys.exc_info()[2])
for idx, entry in enumerate(exloc):
if entry[3] is None:
exec_line = idx
if exec_line is not None:
exloc = [(bfn, exloc[exec_line][1], '', linecache.getline(bfn, exloc[exec_line][1]))] + exloc[exec_line:]
sys.stderr.write('Error while processing %s\n' % os.path.abspath(bfn))
sys.stderr.write(str.join('', traceback.format_list(exloc)))
sys.stderr.write(str.join('', exinfo))
sys.exit(1)
python类format_exception_only()的实例源码
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
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 print_exception(exc_type, exc_value, exc_tb):
# remove debugger frames from the top and bottom of the traceback
tb = traceback.extract_tb(exc_tb)
for i in [0, -1]:
while tb:
frame_file = path.normcase(tb[i][0])
if not any(is_same_py_file(frame_file, f) for f in DONT_DEBUG):
break
del tb[i]
# print the traceback
if tb:
print('Traceback (most recent call last):')
for out in traceback.format_list(tb):
sys.stderr.write(out)
# print the exception
for out in traceback.format_exception_only(exc_type, exc_value):
sys.stdout.write(out)
def print_exception(exc_type, exc_value, exc_tb):
# remove debugger frames from the top and bottom of the traceback
tb = traceback.extract_tb(exc_tb)
for i in [0, -1]:
while tb:
frame_file = path.normcase(tb[i][0])
if not any(is_same_py_file(frame_file, f) for f in DONT_DEBUG):
break
del tb[i]
# print the traceback
if tb:
print('Traceback (most recent call last):')
for out in traceback.format_list(tb):
sys.stderr.write(out)
# print the exception
for out in traceback.format_exception_only(exc_type, exc_value):
sys.stdout.write(out)
def user_exception(self, frame, info):
"""This function is called if an exception occurs,
but only if we are to stop at or just below this level."""
if self._wait_for_mainpyfile or self._wait_for_breakpoint:
return
extype, exvalue, trace = info
# pre-process stack trace as it isn't pickeable (cannot be sent pure)
msg = ''.join(traceback.format_exception(extype, exvalue, trace))
# in python3.5, convert FrameSummary to tuples (py2.7+ compatibility)
tb = [tuple(fs) for fs in traceback.extract_tb(trace)]
title = traceback.format_exception_only(extype, exvalue)[0]
# send an Exception notification
msg = {'method': 'exception',
'args': (title, extype.__name__, repr(exvalue), tb, msg),
'id': None}
self.pipe.send(msg)
self.interaction(frame)
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 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 user_exception(self, frame, info):
"""This function is called if an exception occurs,
but only if we are to stop at or just below this level."""
if self._wait_for_mainpyfile or self._wait_for_breakpoint:
return
extype, exvalue, trace = info
# pre-process stack trace as it isn't pickeable (cannot be sent pure)
msg = ''.join(traceback.format_exception(extype, exvalue, trace))
trace = traceback.extract_tb(trace)
title = traceback.format_exception_only(extype, exvalue)[0]
# send an Exception notification
msg = {'method': 'exception',
'args': (title, extype.__name__, exvalue, trace, msg),
'id': None}
self.pipe.send(msg)
self.interaction(frame, info)
def log_traceback_from_info(exception_type, value, tb, dst=sys.stderr, skip=0):
"""Log a given exception nicely to 'dst', showing a traceback.
dst -- writeable file-like object
skip -- number of traceback entries to omit from the top of the list
"""
for line in traceback.format_exception_only(exception_type, value):
dst.write(line)
if (not isinstance(exception_type, str) and
issubclass(exception_type, SyntaxError)):
return
print >>dst, 'traceback (most recent call last):'
text = None
for filename, lineno, fnname, text in traceback.extract_tb(tb)[skip:]:
if fnname == "?":
fn_s = "<global scope>"
else:
fn_s = "(%s)" % fnname
print >>dst, " %s:%s %s" % (filename, lineno, fn_s)
if text is not None:
print >>dst, "failing line:"
print >>dst, text
def user_exception(self, frame, info):
"""This function is called if an exception occurs,
but only if we are to stop at or just below this level."""
if self._wait_for_mainpyfile or self._wait_for_breakpoint:
return
extype, exvalue, trace = info
# pre-process stack trace as it isn't pickeable (cannot be sent pure)
msg = ''.join(traceback.format_exception(extype, exvalue, trace))
trace = traceback.extract_tb(trace)
title = traceback.format_exception_only(extype, exvalue)[0]
# send an Exception notification
msg = {'method': 'exception',
'args': (title, extype.__name__, exvalue, trace, msg),
'id': None}
self.pipe.send(msg)
self.interaction(frame, info)
def default(self, line):
if line[:1] == '!': line = line[1:]
locals = self.curframe_locals
globals = self.curframe.f_globals
try:
code = compile(line + '\n', '<stdin>', 'single')
save_stdout = sys.stdout
save_stdin = sys.stdin
save_displayhook = sys.displayhook
try:
sys.stdin = self.stdin
sys.stdout = self.stdout
sys.displayhook = self.displayhook
exec(code, globals, locals)
finally:
sys.stdout = save_stdout
sys.stdin = save_stdin
sys.displayhook = save_displayhook
except:
exc_info = sys.exc_info()[:2]
self.error(traceback.format_exception_only(*exc_info)[-1].strip())
def print_exception():
import linecache
linecache.checkcache()
flush_stdout()
efile = sys.stderr
typ, val, tb = excinfo = sys.exc_info()
sys.last_type, sys.last_value, sys.last_traceback = excinfo
tbe = traceback.extract_tb(tb)
print('Traceback (most recent call last):', file=efile)
exclude = ("run.py", "rpc.py", "threading.py", "queue.py",
"RemoteDebugger.py", "bdb.py")
cleanup_traceback(tbe, exclude)
traceback.print_list(tbe, file=efile)
lines = traceback.format_exception_only(typ, val)
for line in lines:
print(line, end='', file=efile)
def instance(cls, statement, params,
orig,
dbapi_base_err,
connection_invalidated=False):
# Don't ever wrap these, just return them directly as if
# DBAPIError didn't exist.
if isinstance(orig, (KeyboardInterrupt, SystemExit, DontWrapMixin)):
return orig
if orig is not None:
# not a DBAPI error, statement is present.
# raise a StatementError
if not isinstance(orig, dbapi_base_err) and statement:
msg = traceback.format_exception_only(
orig.__class__, orig)[-1].strip()
return StatementError(
"%s (original cause: %s)" % (str(orig), msg),
statement, params, orig
)
name, glob = orig.__class__.__name__, globals()
if name in glob and issubclass(glob[name], DBAPIError):
cls = glob[name]
return cls(statement, params, orig, connection_invalidated)
def user_exception(self, frame, info):
"""This function is called if an exception occurs,
but only if we are to stop at or just below this level."""
if self._wait_for_mainpyfile or self._wait_for_breakpoint:
return
extype, exvalue, trace = info
# pre-process stack trace as it isn't pickeable (cannot be sent pure)
msg = ''.join(traceback.format_exception(extype, exvalue, trace))
trace = traceback.extract_tb(trace)
title = traceback.format_exception_only(extype, exvalue)[0]
# send an Exception notification
msg = {'method': 'exception',
'args': (title, extype.__name__, exvalue, trace, msg),
'id': None}
self.pipe.send(msg)
self.interaction(frame, info)
def test_base_exception(self):
# Test that exceptions derived from BaseException are formatted right
e = KeyboardInterrupt()
lst = traceback.format_exception_only(e.__class__, e)
self.assertEqual(lst, ['KeyboardInterrupt\n'])
# String exceptions are deprecated, but legal. The quirky form with
# separate "type" and "value" tends to break things, because
# not isinstance(value, type)
# and a string cannot be the first argument to issubclass.
#
# Note that sys.last_type and sys.last_value do not get set if an
# exception is caught, so we sort of cheat and just emulate them.
#
# test_string_exception1 is equivalent to
#
# >>> raise "String Exception"
#
# test_string_exception2 is equivalent to
#
# >>> raise "String Exception", "String Value"
#
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 print_exception():
import linecache
linecache.checkcache()
flush_stdout()
efile = sys.stderr
typ, val, tb = excinfo = sys.exc_info()
sys.last_type, sys.last_value, sys.last_traceback = excinfo
tbe = traceback.extract_tb(tb)
print>>efile, '\nTraceback (most recent call last):'
exclude = ("run.py", "rpc.py", "threading.py", "Queue.py",
"RemoteDebugger.py", "bdb.py")
cleanup_traceback(tbe, exclude)
traceback.print_list(tbe, file=efile)
lines = traceback.format_exception_only(typ, val)
for line in lines:
print>>efile, line,
def test_base_exception(self):
# Test that exceptions derived from BaseException are formatted right
e = KeyboardInterrupt()
lst = traceback.format_exception_only(e.__class__, e)
self.assertEqual(lst, ['KeyboardInterrupt\n'])
# String exceptions are deprecated, but legal. The quirky form with
# separate "type" and "value" tends to break things, because
# not isinstance(value, type)
# and a string cannot be the first argument to issubclass.
#
# Note that sys.last_type and sys.last_value do not get set if an
# exception is caught, so we sort of cheat and just emulate them.
#
# test_string_exception1 is equivalent to
#
# >>> raise "String Exception"
#
# test_string_exception2 is equivalent to
#
# >>> raise "String Exception", "String Value"
#
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 print_exception():
import linecache
linecache.checkcache()
flush_stdout()
efile = sys.stderr
typ, val, tb = excinfo = sys.exc_info()
sys.last_type, sys.last_value, sys.last_traceback = excinfo
tbe = traceback.extract_tb(tb)
print>>efile, '\nTraceback (most recent call last):'
exclude = ("run.py", "rpc.py", "threading.py", "Queue.py",
"RemoteDebugger.py", "bdb.py")
cleanup_traceback(tbe, exclude)
traceback.print_list(tbe, file=efile)
lines = traceback.format_exception_only(typ, val)
for line in lines:
print>>efile, line,
def process_ifconfig_nodes(app, doctree, docname):
ns = dict((k, app.config[k]) for k in app.config.values)
ns.update(app.config.__dict__.copy())
ns['builder'] = app.builder.name
for node in doctree.traverse(ifconfig):
try:
res = eval(node['expr'], ns)
except Exception as err:
# handle exceptions in a clean fashion
from traceback import format_exception_only
msg = ''.join(format_exception_only(err.__class__, err))
newnode = doctree.reporter.error('Exception occured in '
'ifconfig expression: \n%s' %
msg, base_node=node)
node.replace_self(newnode)
else:
if not res:
node.replace_self([])
else:
node.replace_self(node.children)
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 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 showsyntaxerror(self, filename=None):
"""Display the syntax error that just occurred."""
#Override for avoid using sys.excepthook PY-12600
type, value, tb = sys.exc_info()
sys.last_type = type
sys.last_value = value
sys.last_traceback = tb
if filename and type is SyntaxError:
# Work hard to stuff the correct filename in the exception
try:
msg, (dummy_filename, lineno, offset, line) = value.args
except ValueError:
# 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)
sys.stderr.write(''.join(list))
def showtraceback(self):
"""Display the exception that just occurred."""
#Override for avoid using sys.excepthook PY-12600
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]
lines = traceback.format_list(tblist)
if lines:
lines.insert(0, "Traceback (most recent call last):\n")
lines.extend(traceback.format_exception_only(type, value))
finally:
tblist = tb = None
sys.stderr.write(''.join(lines))
def format_exc(limit=None, exception=None, tb_list=None):
"""
This is like print_exc(limit) but returns a string instead of printing to a
file.
"""
result = ["Traceback (most recent call last):\n"]
if exception is None:
exception = get_context_with_traceback(get_async_context()).exception
if tb_list is None:
tb_list = extract_tb(limit)
if tb_list:
result.extend(traceback.format_list(tb_list))
result.extend(traceback.format_exception_only(exception.__class__,
exception))
return result
else:
return None
def format_exc(self, limit=None):
"""
This is like exception.print_exc(limit) but returns a string instead
of printing to a file.
"""
result = ["Traceback (most recent call last):\n"]
tb_list = self._traceback
if limit is not None:
tb_list = tb_list[-limit:]
result.extend(traceback.format_list(tb_list))
if self.cause is not None:
result.extend(traceback.format_exception_only(self.cause.__class__,
self.cause))
return result
else:
return result
def user_exception(self, frame, exc_info):
"""This function is called if an exception occurs,
but only if we are to stop at or just below this level."""
if self._wait_for_mainpyfile:
return
exc_type, exc_value, exc_traceback = exc_info
frame.f_locals['__exception__'] = exc_type, exc_value
# An 'Internal StopIteration' exception is an exception debug event
# issued by the interpreter when handling a subgenerator run with
# 'yield from' or a generator controled by a for loop. No exception has
# actually occurred in this case. The debugger uses this debug event to
# stop when the debuggee is returning from such generators.
prefix = 'Internal ' if (not exc_traceback
and exc_type is StopIteration) else ''
self.message('%s%s' % (prefix,
traceback.format_exception_only(exc_type, exc_value)[-1].strip()))
self.interaction(frame, exc_traceback)
# General interaction function
def default(self, line):
if line[:1] == '!': line = line[1:]
locals = self.curframe_locals
globals = self.curframe.f_globals
try:
code = compile(line + '\n', '<stdin>', 'single')
save_stdout = sys.stdout
save_stdin = sys.stdin
save_displayhook = sys.displayhook
try:
sys.stdin = self.stdin
sys.stdout = self.stdout
sys.displayhook = self.displayhook
exec(code, globals, locals)
finally:
sys.stdout = save_stdout
sys.stdin = save_stdin
sys.displayhook = save_displayhook
except:
exc_info = sys.exc_info()[:2]
self.error(traceback.format_exception_only(*exc_info)[-1].strip())
