对于Python 3.5+ 使用回溯。TracebackException，它可以处理在任何地方捕获的异常。

def print_trace(ex: BaseException):
    print(''.join(traceback.TracebackException.from_exception(ex).format()))

例子

import traceback

try:
    1/0
except Exception as ex:
    print(''.join(traceback.TracebackException.from_exception(ex).format()))

> >输出

Traceback (most recent call last):
  File "your_file_name_here.py", line 29, in <module>
    1/0
ZeroDivisionError: division by zero

它与from_exec()和format_exception()相同:

    a = ''.join(traceback.TracebackException.from_exception(ex).format())
    b = traceback.format_exc()
    c = ''.join(traceback.format_exception(type(ex), ex, ex.__traceback__))
    print(a == b == c)  # This is True !!

对于使用Python-3的用户

使用回溯模块和异常。__traceback__可以提取堆栈跟踪，如下所示:

使用traceback.extract_stack()获取当前堆栈跟踪 删除最后三个元素(因为它们是堆栈中的条目，使我找到了调试函数) 使用traceback.extract_tb()从异常对象中追加__traceback__ 使用traceback.format_list()格式化整个内容

import traceback
def exception_to_string(excp):
   stack = traceback.extract_stack()[:-3] + traceback.extract_tb(excp.__traceback__)  # add limit=?? 
   pretty = traceback.format_list(stack)
   return ''.join(pretty) + '\n  {} {}'.format(excp.__class__,excp)

一个简单的演示:

def foo():
    try:
        something_invalid()
    except Exception as e:
        print(exception_to_string(e))

def bar():
    return foo()

当我们调用bar()时，我们得到以下输出:

  File "./test.py", line 57, in <module>
    bar()
  File "./test.py", line 55, in bar
    return foo()
  File "./test.py", line 50, in foo
    something_invalid()

  <class 'NameError'> name 'something_invalid' is not defined

在Python 3中，以下代码将格式化Exception对象，与使用traceback.format_exc()获得的结果完全相同:

import traceback

try: 
    method_that_can_raise_an_exception(params)
except Exception as ex:
    print(''.join(traceback.format_exception(etype=type(ex), value=ex, tb=ex.__traceback__)))

这样做的好处是只需要Exception对象(多亏了记录的__traceback__属性)，因此可以更容易地将其作为参数传递给另一个函数进行进一步处理。

对于Python 3.5+ 使用回溯。TracebackException，它可以处理在任何地方捕获的异常。

def print_trace(ex: BaseException):
    print(''.join(traceback.TracebackException.from_exception(ex).format()))

例子

import traceback

try:
    1/0
except Exception as ex:
    print(''.join(traceback.TracebackException.from_exception(ex).format()))

> >输出

Traceback (most recent call last):
  File "your_file_name_here.py", line 29, in <module>
    1/0
ZeroDivisionError: division by zero

它与from_exec()和format_exception()相同:

    a = ''.join(traceback.TracebackException.from_exception(ex).format())
    b = traceback.format_exc()
    c = ''.join(traceback.format_exception(type(ex), ex, ex.__traceback__))
    print(a == b == c)  # This is True !!

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.