问题描述
因此，我尝试将 LabelEncoder() 函数应用于 dask 数据帧上具有 object dtype 的列：
le = dm.LabelEncoder() #dm is dask-ml module
for column in df.columns:
if df[column].dtype == type(object):
df[column] =le.fit_transform(df[column].astype(str))
但它总是抛出错误
AttributeError: 'bool' object has no attribute 'astype'
这里是完整的错误：
AttributeError Traceback (most recent call last)
<ipython-input-3-f9d73f91f2c1> in <module>
2 for column in df.columns:
3 if df[column].dtype == type(object):
----> 4 df[column] =le.fit_transform(df[column].astype(str))
5
6
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask_ml\preprocessing\label.py in fit_transform(self,y)
131 self,y: Union[ArrayLike,SeriesType]
132 ) -> Union[ArrayLike,SeriesType]:
--> 133 y = self._check_array(y)
134
135 if isinstance(y,da.Array):
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask_ml\preprocessing\label.py in _check_array(self,y)
109 y = y.cat.as_kNown()
110 else:
--> 111 y = y.to_dask_array(lengths=True)
112 return y
113
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\dataframe\core.py in to_dask_array(self,lengths,Meta)
1429 """
1430 if lengths is True:
-> 1431 lengths = tuple(self.map_partitions(len,enforce_Metadata=False).compute())
1432
1433 arr = self.values
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\base.py in compute(self,**kwargs)
277 dask.base.compute
278 """
--> 279 (result,) = compute(self,traverse=False,**kwargs)
280 return result
281
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\base.py in compute(*args,**kwargs)
559 postcomputes.append(x.__dask_postcompute__())
560
--> 561 results = schedule(dsk,keys,**kwargs)
562 return repack([f(r,*a) for r,(f,a) in zip(results,postcomputes)])
563
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\threaded.py in get(dsk,result,cache,num_workers,pool,**kwargs)
82 get_id=_thread_get_id,83 pack_exception=pack_exception,---> 84 **kwargs
85 )
86
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\local.py in get_async(apply_async,dsk,get_id,rerun_exceptions_locally,pack_exception,raise_exception,callbacks,dumps,loads,**kwargs)
485 _execute_task(task,data) # Re-execute locally
486 else:
--> 487 raise_exception(exc,tb)
488 res,worker_id = loads(res_info)
489 state["cache"][key] = res
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\local.py in reraise(exc,tb)
315 if exc.__traceback__ is not tb:
316 raise exc.with_traceback(tb)
--> 317 raise exc
318
319
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\local.py in execute_task(key,task_info,pack_exception)
220 try:
221 task,data = loads(task_info)
--> 222 result = _execute_task(task,data)
223 id = get_id()
224 result = dumps((result,id))
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\core.py in _execute_task(arg,dsk)
119 # temporaries by their reference count and can execute certain
120 # operations in-place.
--> 121 return func(*(_execute_task(a,cache) for a in args))
122 elif not ishashable(arg):
123 return arg
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\core.py in <genexpr>(.0)
119 # temporaries by their reference count and can execute certain
120 # operations in-place.
--> 121 return func(*(_execute_task(a,cache) for a in args))
122 elif not ishashable(arg):
123 return arg
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\core.py in _execute_task(arg,cache) for a in args))
122 elif not ishashable(arg):
123 return arg
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\optimization.py in __call__(self,*args)
961 if not len(args) == len(self.inkeys):
962 raise ValueError("Expected %d args,got %d" % (len(self.inkeys),len(args)))
--> 963 return core.get(self.dsk,self.outkey,dict(zip(self.inkeys,args)))
964
965 def __reduce__(self):
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\core.py in get(dsk,out,cache)
149 for key in toposort(dsk):
150 task = dsk[key]
--> 151 result = _execute_task(task,cache)
152 cache[key] = result
153 result = _execute_task(out,cache)
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\core.py in _execute_task(arg,cache) for a in args))
122 elif not ishashable(arg):
123 return arg
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\utils.py in apply(func,args,kwargs)
29 def apply(func,kwargs=None):
30 if kwargs:
---> 31 return func(*args,**kwargs)
32 else:
33 return func(*args)
c:\users\gp62\pycharmprojects\skripsi\venv\lib\site-packages\dask\array\chunk.py in astype(x,astype_dtype,**kwargs)
266
267 def astype(x,astype_dtype=None,**kwargs):
--> 268 return x.astype(astype_dtype,**kwargs)
269
270
AttributeError: 'bool' object has no attribute 'astype'
感谢任何帮助:)
解决方法
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