pandas ValueError: '对象对于所需数组来说太深'
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ValueError: 'object too deep for desired array'
提问by Othman Nejjar
I have a ValueError: 'object too deep for desired array' in a Python program.
I have this error while using numpy.digitize.
I think it's how I use Pandas DataFrames:
To keep it simple (because this is done through an external library), I have a list in my program but the library needs a DataFrame so I do something like this:
我在 Python 程序中有一个 ValueError: 'object too deep for required array'。使用 numpy.digitize 时出现此错误。
我认为这就是我使用 Pandas DataFrames 的方式:
为了简单起见(因为这是通过外部库完成的),我的程序中有一个列表,但该库需要一个 DataFrame,所以我执行以下操作:
ts = range(1000)
df = pandas.DataFrame(ts)
res = numpy.digitize(df.values, bins)
But then it seems like df.values is an array of lists instead of an array of floats. I mean:
但是看起来 df.values 是一个列表数组而不是一个浮点数组。我的意思是:
array([[ 0],
[ 1],
[ 2],
...,
[997],
[998],
[999]], dtype=int64)
Help please, I spent too much time on this.
请帮助,我花了太多时间在这上面。
采纳答案by Kartik
Try this:
尝试这个:
numpy.digitize(df.iloc[:, 0], bins)
You are trying to get the values from a whole DataFrame. That is why you get the 2D array. Each row in the array is a row of the DataFrame.
您正在尝试从整个 DataFrame 中获取值。这就是为什么你会得到二维数组。数组中的每一行都是 DataFrame 的一行。