请参阅traceback模块，特别是format_exc()函数。在这里。

import traceback

try:
    raise ValueError
except ValueError:
    tb = traceback.format_exc()
else:
    tb = "No error"
finally:
    print tb

请参阅traceback模块，特别是format_exc()函数。在这里。

import traceback

try:
    raise ValueError
except ValueError:
    tb = traceback.format_exc()
else:
    tb = "No error"
finally:
    print tb

我定义了以下helper类:

import traceback
class TracedExeptions(object):
    def __init__(self):
        pass
    def __enter__(self):
        pass

    def __exit__(self, etype, value, tb):
      if value :
        if not hasattr(value, 'traceString'):
          value.traceString = "\n".join(traceback.format_exception(etype, value, tb))
        return False
      return True

我以后可以这样使用:

with TracedExeptions():
  #some-code-which-might-throw-any-exception

之后可以像这样消耗它:

def log_err(ex):
  if hasattr(ex, 'traceString'):
    print("ERROR:{}".format(ex.traceString));
  else:
    print("ERROR:{}".format(ex));

(背景:我很沮丧，因为使用承诺和异常一起，不幸的是将异常在一个地方引发到另一个地方的on_rejected处理程序，因此很难从原始位置获得回溯)

如果你的目标是让异常和stacktrace消息看起来与python抛出错误时完全一样，那么以下代码在python 2+3中都适用:

import sys, traceback


def format_stacktrace():
    parts = ["Traceback (most recent call last):\n"]
    parts.extend(traceback.format_stack(limit=25)[:-2])
    parts.extend(traceback.format_exception(*sys.exc_info())[1:])
    return "".join(parts)

# EXAMPLE BELOW...

def a():
    b()


def b():
    c()


def c():
    d()


def d():
    assert False, "Noooh don't do it."


print("THIS IS THE FORMATTED STRING")
print("============================\n")

try:
    a()
except:
    stacktrace = format_stacktrace()
    print(stacktrace)

print("THIS IS HOW PYTHON DOES IT")
print("==========================\n")
a()

它的工作原理是从堆栈中删除最后一个format_stacktrace()调用，并加入其余的调用。当运行时，上面的示例给出以下输出:

THIS IS THE FORMATTED STRING
============================

Traceback (most recent call last):
  File "test.py", line 31, in <module>
    a()
  File "test.py", line 12, in a
    b()
  File "test.py", line 16, in b
    c()
  File "test.py", line 20, in c
    d()
  File "test.py", line 24, in d
    assert False, "Noooh don't do it."
AssertionError: Noooh don't do it.

THIS IS HOW PYTHON DOES IT
==========================

Traceback (most recent call last):
  File "test.py", line 38, in <module>
    a()
  File "test.py", line 12, in a
    b()
  File "test.py", line 16, in b
    c()
  File "test.py", line 20, in c
    d()
  File "test.py", line 24, in d
    assert False, "Noooh don't do it."
AssertionError: Noooh don't do it.

我的2美分。

import sys, traceback
try: 
  ...
except Exception, e:
  T, V, TB = sys.exc_info()
  print ''.join(traceback.format_exception(T,V,TB))

如果您希望在未处理异常时获得相同的信息，可以这样做。执行import trace，然后:

try:
    ...
except Exception as e:
    print(traceback.print_tb(e.__traceback__))

我使用的是Python 3.7。