这个简单的Python列表的语法有什么问题？

html5 • • 问答

也许我已经对 Python 生疏了。为什么在粘贴到 Python shell 时这是不可接受的？

hdr_filenames = [
    "20210311_105300_HDR.jpg",
    "20210311_105306_HDR.jpg",
    "20210311_105310_HDR.jpg",
    "20210311_105314_HDR.jpg",
    "20210311_105341_HDR.jpg",    # order of last two have reversed exposures   
    "20210311_105323_HDR.jpg"
    ]

当将其复制到运行 python3 的 xterm 中的提示时，我得到（更不用说古怪的复古术语）：

编辑：忘记报告一些基本的明显信息我很傻：这是 Python 3.9.1 版，在大约一个月前更新的 Arch Linux 上。

回答

所以，我没有一个完整这里的答案，但是这有什么做的新的PEG解析器首次推出在Python 3.9，因为当我用它（这是关于Python 3.9的默认解析器），我得到了同样的错误：

Python 3.9.1 (default, Dec 11 2020, 06:28:49)
[Clang 10.0.0 ] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> hdr_filenames = [
    "20210311_105300_HDR.jpg",
    "20210311_105306_HDR.jpg",
    "20210311_105310_HDR.jpg",
    "20210311_105314_HDR.jpg",
    "20210311_105341_HDR.jpg",    # order of last two have reversed exposures
    "20210311_105323_HDR.jpg"
    ]
  File "<stdin>", line 1
        ]
         ^
SyntaxError: multiple statements found while compiling a single statement

但是您可以通过传递命令行选项来恢复到旧的 LL(1) 解析器，瞧！没有错误：

(py39) juanarrivillaga@50-254-139-253-static % python -X oldparser
Python 3.9.1 (default, Dec 11 2020, 06:28:49)
[Clang 10.0.0 ] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> hdr_filenames = [
    "20210311_105300_HDR.jpg",
    "20210311_105306_HDR.jpg",
    "20210311_105310_HDR.jpg",
    "20210311_105314_HDR.jpg",
    "20210311_105341_HDR.jpg",    # order of last two have reversed exposures
    "20210311_105323_HDR.jpg"
    ]
>>> exit()

对于那些感兴趣的人，有关新解析器的相关PEP 617。

编辑

因此，这似乎不再是 Python 3.9.2（我相信是当前最新版本）上的问题。所以也许升级？

Python 3.9.2 (default, Mar  3 2021, 11:58:52)
[Clang 10.0.0 ] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> hdr_filenames = [
...     "20210311_105300_HDR.jpg",
...     "20210311_105306_HDR.jpg",
...     "20210311_105310_HDR.jpg",
...     "20210311_105314_HDR.jpg",
...     "20210311_105341_HDR.jpg",    # order of last two have reversed exposures
...     "20210311_105323_HDR.jpg"
...     ]
>>>

  • Wow. Dude. That's some killer sleuthing. I'm impressed with your knowledge. I'm clueless as to PEG vs LL(1) vs paper-and-pencil. Most excellent. - In fact...I'd call this a pretty darn complete answer. I think it's unreasonable to expect you to find the exact line of code that is to blame, LOL. What else can you do?
  • Your error slightly differs from the OP's screenshot, where there's an empty line above the line with `^`.
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