我不明白为什么我不能导入music21

Question

我是Python的新手，所以也许我可以先学习基础知识…我是一个音乐家，热衷于学习如何在音乐中使用Python。

我安装了适用于Windows10的Python3.8 x64，然后使用pip安装了music21。

打开Python Shell，输入import music21，结果如下：

    Python 3.8.0 (tags/v3.8.0:fa919fd, Oct 14 2019, 19:37:50) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license()" for more information.
>>> import music21
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    import music21
  File "D:\Python\lib\site-packages\music21\__init__.py", line 170, in <module>
    from music21 import base
  File "D:\Python\lib\site-packages\music21\base.py", line 94, in <module>
    from music21 import common
  File "D:\Python\lib\site-packages\music21\common\__init__.py", line 39, in <module>
    from music21.common.parallel import *
  File "D:\Python\lib\site-packages\music21\common\parallel.py", line 19, in <module>
    from music21.ext.joblib import Parallel, delayed  # @UnresolvedImport # type: ignore
  File "D:\Python\lib\site-packages\music21\ext\joblib\__init__.py", line 119, in <module>
    from .parallel import Parallel
  File "D:\Python\lib\site-packages\music21\ext\joblib\parallel.py", line 32, in <module>
    from .externals.cloudpickle import dumps, loads
  File "D:\Python\lib\site-packages\music21\ext\joblib\externals\cloudpickle\__init__.py", line 3, in <module>
    from .cloudpickle import *
  File "D:\Python\lib\site-packages\music21\ext\joblib\externals\cloudpickle\cloudpickle.py", line 167, in <module>
    _cell_set_template_code = _make_cell_set_template_code()
  File "D:\Python\lib\site-packages\music21\ext\joblib\externals\cloudpickle\cloudpickle.py", line 148, in _make_cell_set_template_code
    return types.CodeType(
TypeError: an integer is required (got type bytes)

我已经找到了可以与music21一起运行的示例代码，但是如果出现错误，我就不能使用它。

希望有人能帮上忙。如果我是一个彻头彻尾的n00b，很抱歉。查看了其他问题，但没有找到或不理解答案。

Answer 1

因此，从您的输出来看，最有用的部分似乎是D:\Python\lib\site-packages\music21\ext\joblib\externals\cloudpickle\cloudpickle.py文件中_make_cell_set_template_code函数中的TypeError: an integer is required (got type bytes)。这个问题可能是music21与Python3.8不兼容的问题。我正在阅读来自https://web.mit.edu/music21/的文档，它说v.5支持Python3.4-3.6，所以我会尝试其中一个版本，并重新启动您为达到上述步骤所做的过程。希望这能有所帮助！

Answer 2

music21 v5不支持Python3.8 --选择3.7或从github下载最新的Git。

编辑: v5.7.2现在支持3.8