在 iPython notebook 中调试的正确方法是什么? [英] What is the right way to debug in iPython notebook?

问题描述

据我所知，%debug magic 可以在一个单元格内进行调试.

但是，我有跨多个单元格的函数调用.

例如

In[1]: def fun1(a)def fun2(b)# 我想为下一行设置断点 #返回 do_some_thing_about(b)返回乐趣2(a)In[2]:将多处理导入为 mppool=mp.Pool(进程数=2)结果=pool.map(fun1, 1.0)池.close()池连接

我的尝试:

1. 我试图在 cell-1 的第一行设置 %debug.但它会立即进入调试模式，甚至在执行 cell-2 之前.

2. 我尝试在代码 return do_some_thing_about(b) 之前的行中添加 %debug.但是代码会永远运行，永远不会停止.

在 ipython notebook 中设置断点的正确方法是什么?

解决方案

使用 ipdb

通过

安装

pip install ipdb

用法:

In[1]: def fun1(a):def fun2(a):导入ipdb；ipdb.set_trace() # 调试从这里开始返回 do_some_thing_about(b)返回乐趣2(a)在[2]:fun1(1)

要逐行执行，请使用 n，要进入函数，请使用 s，要退出调试提示，请使用 c.

可用命令的完整列表:https://appletree.or.kr/quick_reference_cards/Python/Python%20Debugger%20Cheatsheet.pdf

As I know, %debug magic can do debug within one cell.

However, I have function calls across multiple cells.

For example,

In[1]: def fun1(a)
           def fun2(b)
               # I want to set a breakpoint for the following line #
               return do_some_thing_about(b)

       return fun2(a)

In[2]: import multiprocessing as mp
       pool=mp.Pool(processes=2)
       results=pool.map(fun1, 1.0)
       pool.close()
       pool.join

What I tried:

1. I tried to set %debug in the first line of cell-1. But it enter into debug mode immediately, even before executing cell-2.

2. I tried to add %debug in the line right before the code return do_some_thing_about(b). But then the code runs forever, never stops.

What is the right way to set a break point within the ipython notebook?

解决方案

Use ipdb

Install it via

pip install ipdb

Usage:

In[1]: def fun1(a):
   def fun2(a):
       import ipdb; ipdb.set_trace() # debugging starts here
       return do_some_thing_about(b)
   return fun2(a)
In[2]: fun1(1)

For executing line by line use n and for step into a function use s and to exit from debugging prompt use c.

For complete list of available commands: https://appletree.or.kr/quick_reference_cards/Python/Python%20Debugger%20Cheatsheet.pdf

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