C有gdb,Python也有pdb

C有gdb,Python也有pdb

写过C语言的同学们想必都很怀念(读者:¿)gdb调试器,使用gdb可以随意在程序运行过程中暂停流程、查看变量。

很多时候,我们单纯分析代码流程和日志信息无法定位的问题,都得靠调试器来帮忙;可以说有了调试器,程序员才是代码世界完整的上帝。

Python当然也不示弱,同样存在这样的巴别塔可以让人升天

01

——不过阿酱必须承认的是,现代IDE集成的图形化调试功能已经很好使了,一般情况下使用命令行工具的场景并不多。

但是也确实存在无法使用图形化IDE的情况,因此对pdb工具略作了解还是很有必要的。毕竟谁也不知道可能被扔给一个什么样的环境啊哈哈

pdb的使用

作为解释型语言,Python调试工具的使用跟gdb毕竟还是有区别的。

比如Python的调试就不需要什么符号表之类的东西,说到底,最终Python虚拟机执行的逻辑也是自带符号的。

也正是由于Python的这种特殊性,所有pdb其实有两种不太一样的使用方式,即侵入式和非侵入式。

其实按字面意思就很容易理解在两种方式的使用。类比一下脑机接口,也分为侵入式和非侵入式。侵入式就表示要将电极、芯片植入大脑皮层,“侵入”人体;而非侵入式则是在头骨外收集脑电波进行分析。

同样地,侵入式pdb调用就是将调用pdb的代码直接写入Python脚本当中;而非侵入式则是从命令行调用pdb,执行相应被调试脚本。

  1. 侵入式pdb

    使用方式如下代码所示,在代码中途插入一行调用:

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    import pdb; # pdb.set_trace()
       
       
    a = "just"
    b = "do"
       
    pdb.set_trace()
       
    c = ['p', 'y', 't', 'h', 'o', 'n']
    print(a)
    

    运行脚本,会进入这样一个交互式界面:

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    D:
    D:\000-GitHub\python-examples\xuanyuanyulong\2020-11-04-python-pdb>python test_pdb_intrusive.py
    > d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py(21)<module>()
    -> c = ['p', 'y', 't', 'h', 'o', 'n']
    (Pdb)
    
    00-GitHub\python-examples\xuanyuanyulong020-11-04-python-pdb>python test_pdb_intrusive.py > d:
    D:\000-GitHub\python-examples\xuanyuanyulong\2020-11-04-python-pdb>python test_pdb_intrusive.py
    > d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py(21)<module>()
    -> c = ['p', 'y', 't', 'h', 'o', 'n']
    (Pdb)
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py(21)<module>() -> c = ['p', 'y', 't', 'h', 'o', 'n'] (Pdb)

    到这里已经启动了pdb,并且打印内容中-> c = ['p', 'y', 't', 'h', 'o', 'n']行首的箭头,表示当前程序执行流到了这一行代码,如果继续执行,将首先执行该行。

  2. 非侵入式pdb

    非侵入式要xue微简单一些,最大的好处是不需要改动代码。

    我们在控制台执行以下命令:

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    D:
    D:\000-GitHub\python-examples\xuanyuanyulong\2020-11-04-python-pdb>python -m pdb test_pdb_intrusive.py
    > d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>()
    -> import pdb; # pdb.set_trace()
    (Pdb)
    
    00-GitHub\python-examples\xuanyuanyulong020-11-04-python-pdb>python -m pdb test_pdb_intrusive.py > d:
    D:\000-GitHub\python-examples\xuanyuanyulong\2020-11-04-python-pdb>python -m pdb test_pdb_intrusive.py
    > d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>()
    -> import pdb; # pdb.set_trace()
    (Pdb)
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>() -> import pdb; # pdb.set_trace() (Pdb)

    可以看到,通过这种方式进入调试,程序执行流停在了程序开头。

    通过分析进入调试时代码执行流的位置,我们可以发现,实际上侵入式的插入pdb.set_trace()调用,等价于我们从命令行启动pdb,然后在这个调用的下一行打了一个断点,然后直接运行程序。

简单命令

gdb中有一些常用的简单命令,本节阿酱带大家熟悉一下,后续会做更深入的讨论。

  1. h(elp)

    在pdb界面下输入hhelp命令,即可列出pdb中支持的各种命令:

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    (Pdb) h
       
    Documented commands (type help <topic>):
    ========================================
    EOF    c          d        h         list      q        rv       undisplay
    a      cl         debug    help      ll        quit     s        unt
    alias  clear      disable  ignore    longlist  r        source   until
    args   commands   display  interact  n         restart  step     up
    b      condition  down     j         next      return   tbreak   w
    break  cont       enable   jump      p         retval   u        whatis
    bt     continue   exit     l         pp        run      unalias  where
       
    Miscellaneous help topics:
    ==========================
    exec  pdb
    

    在pdb后带一个命令作为参数,还可进一步看到相应的使用说明:

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    (Pdb) h h
    h(elp)
            Without argument, print the list of available commands.
            With a command name as argument, print help about that command.
            "help pdb" shows the full pdb documentation.
            "help exec" gives help on the ! command.
    

    相信我,help其实才是pdb里面最重要的命令。别的什么都可以记不住,但是help一定要记住。在以结果为导向的职场生活中也是一样,遇到问题要及时求助哟~

  2. l(ist)

    打印当前文件的源代码。不带参数的话,默认打印当前行前后共计11行代码。继续执行该命令的话,则会继续往后打印最多11行代码,直到遇上文件结束符EOF。

    .作为参数则限定要强一点,只会打印当前行前后11行代码。

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    (Pdb) l
      1  -> import pdb; # pdb.set_trace()
      2
      3
      4     def addStr(a, b):
      5         return a + b
      6
      8         return ''.join(l)
      9
     10     def getSlogan(a, b, c):
     11         result = addStr(a, b) + mergeChar(c)
    

    当指定两个参数时,则打印这个区间内的代码:

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    (Pdb) l 3, 7
      3
      4     def addStr(a, b):
      5         return a + b
      6
      7  -> def mergeChar(l: list):
    

    而当第二个参数b比第一个参数a小的时候,则表示“从第a行开始,继续往后打印b行”,也就是总共打印(1+b)行:

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    (Pdb) l 7, 3
      7  -> def mergeChar(l: list):
      8         return ''.join(l)
      9
     10     def getSlogan(a, b, c):
    
  3. p/pp

    打印某个对象的值。区别在于pp调用的是pprint函数,打印更加美观。

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    (Pdb) p a
    'just'
    (Pdb) p addStr
    <function addStr at 0x000002087B0F9C80>
    
  4. !

    使用!可以在pdb环境下,执行一般的Python语句。通常我们可以用来改变变量的值——要不怎么说调试器可以让你成为上帝呢?还有比这更为所欲为的吗?

    一般的话这个!其实可以省略,但是当要执行语句开头的单词与pdb的已有命令冲突,就得不到预期结果了,所以建议还是加上。

    这个用!领起命令的做法跟vim编辑器的逻辑很像,可以类比记忆。不熟悉的读者可以忽略。

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    (Pdb) !a = "python"
    (Pdb) p a
    'python'
    
  5. r(eturn)

    pdb中,rreturn表示同一个意思,即“运行当前函数直到返回”。

    这一点上,r在pdb和gdb中的含义是不同的。读者不必在意

  6. run/restart

    表示重新运行当前被调试程序。使用这个命令,可以为需要传入参数的脚本传入所需参数。

    格式与命令行执行该脚本一样,只是把相应的python命令和脚本路径替换为了runrestart

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    (Pdb) run a b c d kkk
    Restarting test_pdb_intrusive.py with arguments:
            test_pdb_intrusive.py
    > d:
    (Pdb) run a b c d kkk
    Restarting test_pdb_intrusive.py with arguments:
            test_pdb_intrusive.py
    > d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>()
    -> import pdb; # pdb.set_trace()
    (Pdb) !import sys
    (Pdb) p sys.argv
    ['test_pdb_intrusive.py', 'a', 'b', 'c', 'd', 'kkk']
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>() -> import pdb; # pdb.set_trace() (Pdb) !import sys (Pdb) p sys.argv ['test_pdb_intrusive.py', 'a', 'b', 'c', 'd', 'kkk']
  7. b(reak)

    查看/添加断点。

    不带任何参数时,即列出当前已有断点。

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    (Pdb) b 21
    Breakpoint 1 at d:
    (Pdb) b 21
    Breakpoint 1 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 17
    Breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 (Pdb) b 17 Breakpoint 2 at d:
    (Pdb) b 21
    Breakpoint 1 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 17
    Breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17 (Pdb) b Num Type Disp Enb Where 1 breakpoint keep yes at d:
    (Pdb) b 21
    Breakpoint 1 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 17
    Breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 2 breakpoint keep yes at d:
    (Pdb) b 21
    Breakpoint 1 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 17
    Breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17

    同时,通过runrestart重新运行被调试程序,不会清除已有断点:

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    (Pdb) run
    Restarting test_pdb_intrusive.py with arguments:
            test_pdb_intrusive.py
    > d:
    (Pdb) run
    Restarting test_pdb_intrusive.py with arguments:
            test_pdb_intrusive.py
    > d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>()
    -> import pdb; # pdb.set_trace()
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>() -> import pdb; # pdb.set_trace() (Pdb) b Num Type Disp Enb Where 1 breakpoint keep yes at d:
    (Pdb) run
    Restarting test_pdb_intrusive.py with arguments:
            test_pdb_intrusive.py
    > d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>()
    -> import pdb; # pdb.set_trace()
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 2 breakpoint keep yes at d:
    (Pdb) run
    Restarting test_pdb_intrusive.py with arguments:
            test_pdb_intrusive.py
    > d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py(1)<module>()
    -> import pdb; # pdb.set_trace()
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17
  8. cl(ear)

    有三种使用方式:1)类似设置断点时,清除特定文件特定行的断点;2)将要清除的断点号列出来,以空格分隔;3)不带参数,清除所有断点。

    下面一一演示:

    1)类似设置断点时,清除特定文件特定行的断点

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    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) clear test_pdb_intrusive.py:21
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 2 breakpoint keep yes at d:
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) clear test_pdb_intrusive.py:21
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17 (Pdb) clear test_pdb_intrusive.py:21 (Pdb) b Num Type Disp Enb Where 2 breakpoint keep yes at d:
    (Pdb) b
    Num Type         Disp Enb   Where
    1   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) clear test_pdb_intrusive.py:21
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17

    2)将要清除的断点号列出来,以空格分隔

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    (Pdb) b 21
    Breakpoint 3 at d:
    (Pdb) b 21
    Breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 15
    Breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    4   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear 2 4
    Deleted breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 (Pdb) b 15 Breakpoint 4 at d:
    (Pdb) b 21
    Breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 15
    Breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    4   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear 2 4
    Deleted breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:15 (Pdb) b Num Type Disp Enb Where 2 breakpoint keep yes at d:
    (Pdb) b 21
    Breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 15
    Breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    4   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear 2 4
    Deleted breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17 3 breakpoint keep yes at d:
    (Pdb) b 21
    Breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 15
    Breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    4   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear 2 4
    Deleted breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 4 breakpoint keep yes at d:
    (Pdb) b 21
    Breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 15
    Breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    4   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear 2 4
    Deleted breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:15 (Pdb) clear 2 4 Deleted breakpoint 2 at d:
    (Pdb) b 21
    Breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 15
    Breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    4   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear 2 4
    Deleted breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17 Deleted breakpoint 4 at d:
    (Pdb) b 21
    Breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 15
    Breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    4   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear 2 4
    Deleted breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:15 (Pdb) b Num Type Disp Enb Where 3 breakpoint keep yes at d:
    (Pdb) b 21
    Breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    (Pdb) b 15
    Breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    2   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    4   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear 2 4
    Deleted breakpoint 2 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 4 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21

    3)不带参数,清除所有断点

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    (Pdb) b 17
    Breakpoint 5 at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17 (Pdb) b 15 Breakpoint 6 at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:15 (Pdb) b Num Type Disp Enb Where 3 breakpoint keep yes at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 5 breakpoint keep yes at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17 6 breakpoint keep yes at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:15 (Pdb) b Num Type Disp Enb Where 3 breakpoint keep yes at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 5 breakpoint keep yes at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17 6 breakpoint keep yes at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:15 (Pdb) clear Clear all breaks? yes Deleted breakpoint 3 at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:21 Deleted breakpoint 5 at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:17 Deleted breakpoint 6 at d:
    (Pdb) b 17
    Breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    (Pdb) b 15
    Breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    Num Type         Disp Enb   Where
    3   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    5   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    6   breakpoint   keep yes   at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) clear
    Clear all breaks? yes
    Deleted breakpoint 3 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:21
    Deleted breakpoint 5 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:17
    Deleted breakpoint 6 at d:\000-github\python-examples\xuanyuanyulong\2020-11-04-python-pdb\test_pdb_intrusive.py:15
    (Pdb) b
    
    00-github\python-examples\xuanyuanyulong020-11-04-python-pdb\test_pdb_intrusive.py:15 (Pdb) b

好了打住打住,写之前感觉pdb没多少东西,没想到写起来才发现,这么一点内容就已经这么多了,今天又熬夜了……

02

狗命要紧各位读者老爷后会有期、后会有期

总结

pdb的内容出乎意料地丰富,还有很多内容在这篇文章中都没能涉及。之后会再写一篇以作补充。

软件调试其实也是一门很有趣的学问,当然,也是一门很有用的学问。

示例代码:<https://github.com/JustDoPython/python-examples/tree/master/xuanyuanyulong/2020-11-04-python-pdb

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