如何逐步处理Python代码以帮助调试问题？ [英] How to step through Python code to help debug issues?

问题描述

在Java / C＃中，您可以轻松地逐步执行代码以跟踪可能出了什么问题，而IDE使此过程非常人性化。

In Java/C# you can easily step through code to trace what might be going wrong, and IDE's make this process very user friendly.

您可以通过python进行跟踪吗？

Can you trace through python code in a similar fashion?

推荐答案

是的！为此，有一个名为 pdb 的Python调试器！

Yes! There's a Python debugger called pdb just for doing that!

您可以通过<$ c $启动Python程序c> pdb 使用 pdb myscript.py 或 python -m pdb myscript.py 。

随后您可以发出一些命令，这些命令记录在 pdb 页。

There are a few commands you can then issue, which are documented on the pdb page.

需要记住的一些有用的方法是：

Some useful ones to remember are:

• b ：设置断点


• c ：继续调试，直到遇到断点为止


• s ：步骤通过代码


• n ：转到下一行代码


• l ：列出当前文件的源代码（默认值：11行，包括正在执行的行）


• u ：向上浏览堆栈框架


• d ：向下浏览堆栈框架


• p ：打印a的值当前上下文中的n表达式

• b: set a breakpoint
• c: continue debugging until you hit a breakpoint
• s: step through the code
• n: to go to next line of code
• l: list source code for the current file (default: 11 lines including the line being executed)
• u: navigate up a stack frame
• d: navigate down a stack frame
• p: to print the value of an expression in the current context

如果您不想使用命令行调试器，则某些IDE如 Pydev ， Wing IDE 或 PyCharm 具有GUI调试器。 Wing和PyCharm是商业产品，但是Wing具有免费的个人版本，PyCharm具有免费的社区版本。

If you don't want to use a command line debugger, some IDEs like Pydev, Wing IDE or PyCharm have a GUI debugger. Wing and PyCharm are commercial products, but Wing has a free "Personal" edition, and PyCharm has a free community edition.

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