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Drop into an Interpreter anytime in-030
原标题:Drop into an Interpreter anytime in Python

我知道如何用<代码>pdb和IPython向口译员投递,但这要求我事先知道我想要停止哪里。 然而,我常常拿着需要几分钟到几个小时的打字,我想确切地知道进展是什么。 一种解决办法是简单地在任何地方发表大量伐木声明,但我要么不了解太多的信息,要么不确切地记录我所知道的情况。

Is there a way to initialize a listener loop that under some key combination will drop me into the code wherever it currently is? Think CTRL+Z but leaving me in Python rather than Bash.

最佳回答

您可使用signal模块,设立一个手递,在你打上控制C或控制-Z时发射洗gger。 SIGINTR, SIGSUSP.

例如,界定了高于SIGQUIT的模块instant_debug.py

import signal
import pdb

def handler(signum, frame):
  pdb.set_trace()

signal.signal(signal.SIGQUIT, handler)

然后作文字说明

import instant_debug
import time

for i in xrange(1000000):
  print i
  time.sleep(0.1)

在执行期间,你可以通过打字<代码>CTRL+,审查带<代码>u和d的栏目,作为正常的<代码>pdb,然后继续使用<编码>c。 请注意,只有在下一次“天文学”行动结束时,你才会跳跃——这意味着在巨型C模块中不会停下来。

问题回答

你可以这样做。

def main():
    i = 1000
    while True:
        print "Count Down %s" % i
        time.sleep(1)
        i -= 1

try:
    main()
except KeyboardInterrupt:
    pass # Swallow ctrl-c
finally:
    code.interact("Dropped into interpreter", local=globals())




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