如何设置sys.excepthook在python中全局调用pdb？ [英] How do I set sys.excepthook to invoke pdb globally in python?

问题描述

从Python文档：

sys.excepthook（type，value，traceback）

此函数打印给定的跟踪和异常 sys.stderr 。

This function prints out a given traceback and exception to sys.stderr.

当引发异常和未捕获异常时，解释器使用三个参数调用 sys.excepthook ，异常类，异常实例和跟踪目的。在交互会话中，这发生在控制返回到提示之前;在Python程序中，这发生在程序退出之前。这种顶级异常的处理可以通过为 sys.excepthook 分配另一个三参数函数来定制。

When an exception is raised and uncaught, the interpreter calls sys.excepthook with three arguments, the exception class, exception instance, and a traceback object. In an interactive session this happens just before control is returned to the prompt; in a Python program this happens just before the program exits. The handling of such top-level exceptions can be customized by assigning another three-argument function to sys.excepthook.

http://docs.python.org/library/sys .html

如何在全局范围内修改它，所以默认操作是总是调用 pdb ？有没有可以更改的配置文件？

How do I modify this globally so the default action is to always invoke pdb? Is there a configuration file I can change? I don't want to wrap my code to do this.

推荐答案

这里是你需要的

http://ynniv.com/blog/2007 /11/debugging-python.html

三种方法，第一种是简单但粗糙的（ Thomas Heller ） - 将以下内容添加到site-packages / sitecustomize.py：

Three ways, the first is simple but crude (Thomas Heller) - add the following to site-packages/sitecustomize.py:

import pdb, sys, traceback
def info(type, value, tb):
    traceback.print_exception(type, value, tb)
    pdb.pm()
sys.excepthook = info

更复杂，并检查交互模式（奇怪地跳过交互模式下的调试），从 cookbook ：

The second is more sophisticated, and checks for interactive mode (weirdly skipping the debugging in interactive mode), from the cookbook:

# code snippet, to be included in 'sitecustomize.py'
import sys

def info(type, value, tb):
   if hasattr(sys, 'ps1') or not sys.stderr.isatty():
      # we are in interactive mode or we don't have a tty-like
      # device, so we call the default hook
      sys.__excepthook__(type, value, tb)
   else:
      import traceback, pdb
      # we are NOT in interactive mode, print the exception...
      traceback.print_exception(type, value, tb)
      print
      # ...then start the debugger in post-mortem mode.
      pdb.pm()

sys.excepthook = info

第三个（始终启动调试器，除非重定向stdin或stderr）由 ynniv

And the third (which always start the debugger unless stdin or stderr are redirected) by ynniv

# code snippet, to be included in 'sitecustomize.py'
import sys

def info(type, value, tb):
   if (#hasattr(sys, "ps1") or
       not sys.stderr.isatty() or 
       not sys.stdin.isatty()):
       # stdin or stderr is redirected, just do the normal thing
       original_hook(type, value, tb)
   else:
       # a terminal is attached and stderr is not redirected, debug 
       import traceback, pdb
       traceback.print_exception(type, value, tb)
       print
       pdb.pm()
       #traceback.print_stack()

original_hook = sys.excepthook
if sys.excepthook == sys.__excepthook__:
    # if someone already patched excepthook, let them win
    sys.excepthook = info

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