python - 创建空数据框的 Pandas 错误

Question

我尝试制作一个虚拟数据框，column_names = ["a", "b", "c"]df = pd.DataFrame(columns = column_names)我收到以下错误，以前没有发生过，我错过了什么吗？这仅在创建空数据框时发生，这是最近引入的错误。

  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.7/site-packages/pandas/core/frame.py", line 411, in __init__
    mgr = init_dict(data, index, columns, dtype=dtype)
  File "/usr/local/lib/python3.7/site-packages/pandas/core/internals/construction.py", line 242, in init_dict
    val = construct_1d_arraylike_from_scalar(np.nan, len(index), nan_dtype)
  File "/usr/local/lib/python3.7/site-packages/pandas/core/dtypes/cast.py", line 1221, in construct_1d_arraylike_from_scalar
    dtype = dtype.dtype
AttributeError: type object 'object' has no attribute 'dtype'

Answer 1

这是pandas==0.25.3发生的情况
更新为最新的pandas==1.2.1更新:
这是由于numpy软件包1.20.0所致，
所以我改为锁定numpy包numpy==1.19.5，pandas==0.25.3如果您想知道为什么不想不必要地更新软件包，请引用此文件https://medium.com/@singhnight/how-not-to-resolve-package-related-issues-7544c3a44dc