如何在Python中获得完整的异常堆栈跟踪 - python

以下代码段:

import traceback

def a():
    b()

def b():
    try:
        c()
    except:
        traceback.print_exc()

def c():
    assert False

a()

产生以下输出:

Traceback (most recent call last):
  File "test.py", line 8, in b
    c()
  File "test.py", line 13, in c
    assert False
AssertionError

如果我想要完整的堆栈跟踪信息，包括对a的调用，应该使用什么？

如果重要的话，我有Python 2.6.6

编辑:我想要得到的是与我相同的信息，如果我不去尝试，则将异常传播到顶层。此代码段例如:

def a():
    b()

def b():
    c()

def c():
    assert False

a()

产生以下输出:

Traceback (most recent call last):
  File "test.py", line 10, in <module>
    a()
  File "test.py", line 2, in a
    b()
  File "test.py", line 5, in b
    c()
  File "test.py", line 8, in c
    assert False
AssertionError

参考方案

我不知道是否有更好的方法，但是这是我做的:

import traceback
import sys

def format_exception(e):
    exception_list = traceback.format_stack()
    exception_list = exception_list[:-2]
    exception_list.extend(traceback.format_tb(sys.exc_info()[2]))
    exception_list.extend(traceback.format_exception_only(sys.exc_info()[0], sys.exc_info()[1]))

    exception_str = "Traceback (most recent call last):\n"
    exception_str += "".join(exception_list)
    # Removing the last \n
    exception_str = exception_str[:-1]

    return exception_str

def main1():
    main2()

def main2():
    try:
        main3()
    except Exception as e:
        print "Printing only the traceback above the current stack frame"
        print "".join(traceback.format_exception(sys.exc_info()[0], sys.exc_info()[1], sys.exc_info()[2]))
        print
        print "Printing the full traceback as if we had not caught it here..."
        print format_exception(e)

def main3():
    raise Exception()

if __name__ == '__main__':
    main1()

这是我得到的输出:

Printing only the traceback above the current stack frame
Traceback (most recent call last):
  File "exc.py", line 22, in main2
    main3()
  File "exc.py", line 31, in main3
    raise Exception()
Exception


Printing the full traceback as if we had not caught it here...
Traceback (most recent call last):
  File "exc.py", line 34, in <module>
    main1()
  File "exc.py", line 18, in main1
    main2()
  File "exc.py", line 22, in main2
    main3()
  File "exc.py", line 31, in main3
    raise Exception()
Exception

Python uuid4，如何限制唯一字符的长度 - python

在Python中，我正在使用uuid4（）方法创建唯一的字符集。但是我找不到将其限制为10或8个字符的方法。有什么办法吗？uuid4()ffc69c1b-9d87-4c19-8dac-c09ca857e3fc谢谢。 参考方案 尝试：x = uuid4() str(x)[:8] 输出："ffc69c1b" Is there a way to…

Python ThreadPoolExecutor抑制异常 - python

from concurrent.futures import ThreadPoolExecutor, wait, ALL_COMPLETED def div_zero(x): print('In div_zero') return x / 0 with ThreadPoolExecutor(max_workers=4) as execut…

Python-如何检查Redis服务器是否可用 - python

我正在开发用于访问Redis Server的Python服务(类)。我想知道如何检查Redis Server是否正在运行。而且如果某种原因我无法连接到它。这是我的代码的一部分import redis rs = redis.Redis("localhost") print rs 它打印以下内容<redis.client.Redis o…

Python-crontab模块 - python

我正在尝试在Linux OS（CentOS 7）上使用Python-crontab模块我的配置文件如下：{ "ossConfigurationData": { "work1": [ { "cronInterval": "0 0 0 1 1 ?", "attribute&…

Python:检查是否存在维基百科文章 - python

我试图弄清楚如何检查Wikipedia文章是否存在。例如，https://en.wikipedia.org/wiki/Food 存在，但是https://en.wikipedia.org/wiki/Fod 不会，页面只是说：“维基百科没有此名称的文章。”谢谢！ 参考方案 >>> import urllib >>> prin…