如何使用 python 调试 VSCode 上的 Google Code Jam 交互问题？答案

【问题标题】：How to debug Google Code Jam interactive problems on VSCode using python?如何使用 python 调试 VSCode 上的 Google Code Jam 交互问题？
【发布时间】：2020-08-10 03:41:08
【问题描述】：

我尝试下载示例交互问题number guessing problem。他们在描述选项卡中提供local testing tool，在分析选项卡中提供python 解决方案，interactive_runner.py 同时运行两个脚本。

在 solution.py 中保存解决方案后，我可以在 shell 上成功运行它：python3 interactive_runner.py python3 local_testing_tool.py 0 -- python3 solution.py。

问题是我无法使用 VSCode 对其进行调试。我尝试将所有 3 个文件放在一个文件夹中并使用以下 launch.json：

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Python: Arquivo Atual",
            "type": "python",
            "request": "launch",
            "program": "interactive_runner.py python3 local_testing_tool.py 0 -- python3 ${file}",
            "console": "integratedTerminal",
        }
    ]
}

当我使用调试器运行solutions.py 时出现错误：

env DEBUGPY_LAUNCHER_PORT=40453 /home/user/.pyenv/versions/3.8.2/bin/python3.8 /home/user/.vscode/extensions/ms-python.python-2020.4.74986/pythonFiles/lib/python/debugpy/no_wheels/debugpy/launcher "interactive_runner.py python3 local_testing_tool.py 0 -- python3 /home/user/workspace/wargames/GoogleCodeJam/2018/PracticeSession/NumberGuessing/solution.py" 
Traceback (most recent call last):
  File "/home/user/.pyenv/versions/3.8.2/lib/python3.8/runpy.py", line 193, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/home/user/.pyenv/versions/3.8.2/lib/python3.8/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/home/user/.vscode/extensions/ms-python.python-2020.4.74986/pythonFiles/lib/python/debugpy/no_wheels/debugpy/__main__.py", line 45, in <module>
    cli.main()
  File "/home/user/.vscode/extensions/ms-python.python-2020.4.74986/pythonFiles/lib/python/debugpy/no_wheels/debugpy/../debugpy/server/cli.py", line 430, in main
    run()
  File "/home/user/.vscode/extensions/ms-python.python-2020.4.74986/pythonFiles/lib/python/debugpy/no_wheels/debugpy/../debugpy/server/cli.py", line 267, in run_file
    runpy.run_path(options.target, run_name=compat.force_str("__main__"))
  File "/home/user/.pyenv/versions/3.8.2/lib/python3.8/runpy.py", line 262, in run_path
    code, fname = _get_code_from_file(run_name, path_name)
  File "/home/user/.pyenv/versions/3.8.2/lib/python3.8/runpy.py", line 232, in _get_code_from_file
    with io.open_code(fname) as f:
FileNotFoundError: [Errno 2] No such file or directory: 'interactive_runner.py python3 local_testing_tool.py 0 -- python3 /home/user/workspace/wargames/GoogleCodeJam/2018/PracticeSession/NumberGuessing/solution.py'

有更好的方法吗？

【问题讨论】：

为什么要指定python3两次？如果interactive_runner.py 正在为您运行 Python，它可能会阻止调试器工作。
@BrettCannon interactive_runner.py 运行两个程序（在本例中为 python）：python3 local_testing_tool.py 0 和 python3 solution.py。它将一个程序的输出作为输入传递给另一个程序。这就是为什么有两个python3，实际上它们是3。

标签： python python-3.x debugging visual-studio-code

【解决方案1】：

"program" 参数只需要文件的路径，因此会出现“没有这样的文件或目录”的错误。您想要做的是将执行行的其余部分作为参数：

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Python: Arquivo Atual",
            "type": "python",
            "request": "launch",
            "program": "interactive_runner.py",
            "console": "integratedTerminal",
            "args": ["python3", "local_testing_tool.py", "0", "--", "python3", "${file}"]  // Not sure if `${file}` will work here.
        }
    ]
}

【讨论】：