Question

我的项目结构是这样的-有3个py文件-main.py，main_lib.py和helper_lib.py。 main_lib和helper_lib导入main.py中。

我正在将help.lib.py中的dask.dataframe导入，并具有一个助手功能，可以像这样从pandas数据框创建dask数据框-

import dask.dataframe as ddf

def get_dask_df(df: pd.DataFrame):
  return ddf.from_pandas(df, npartitions=2)

helper_lib.py和main.py中都调用了此函数。

引起ImportError的代码是这样的-

  data_dask_df = helper_lib.get_dask_df(data)
  result['area'] = data_dask_df[['length', 'width']].apply(
      lambda x: helper_lib.calculate_area(x),
      meta=('int'),
      axis=1).compute()

这是堆栈跟踪-

  File "/xxx/dask/base.py", line 156, in compute
    (result,) = compute(self, traverse=False, **kwargs)
  File "/xxx/dask/base.py", line 398, in compute
    results = schedule(dsk, keys, **kwargs)
  File "/xxx/dask/threaded.py", line 76, in get
    pack_exception=pack_exception, **kwargs)
  File "/xxx/dask/local.py", line 462, in get_async
    raise_exception(exc, tb)
  File "/xxx/dask/compatibility.py", line 112, in reraise
    raise exc
  File "/xxx/dask/local.py", line 230, in execute_task
    result = _execute_task(task, data)
  File "/xxx/dask/core.py", line 119, in _execute_task
    return func(*args2)
  File "/xxx/dask/optimization.py", line 942, in __call__
    dict(zip(self.inkeys, args)))
  File "/xxx/dask/core.py", line 149, in get
    result = _execute_task(task, cache)
  File "/xxx/dask/core.py", line 119, in _execute_task
    return func(*args2)
  File "/xxx/dask/compatibility.py", line 93, in apply
    return func(*args, **kwargs)
  File "/xxx/dask/dataframe/core.py", line 3879, in apply_and_enforce
    df = func(*args, **kwargs)
  File "/xxx/dask/utils.py", line 772, in __call__
    return getattr(obj, self.method)(*args, **kwargs)
  File "/xxx/pandas/core/frame.py", line 6477, in apply
    from pandas.core.apply import frame_apply
ImportError: cannot import name 'frame_apply'

我在main_lib和helper_lib中都有此导入-

import pandas as pd

我尝试在main_lib和helper_lib中复制get_dask_df函数，并在两者中导入dask。仍然不起作用。

在互联网上，这似乎与循环/多次导入有关，或者frame_apply已被导入到其他地方，因此它在此推迟的导入上引发了ImportError。

如何调试/解决这个问题？

ImportError：无法导入名称“ frame_apply”

0 个答案: