Pandas read_csv: AttributeError: 'NoneType' 对象没有属性 'dtype'
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时间:2020-09-13 23:23:00 来源:igfitidea点击:
Pandas read_csv: AttributeError: 'NoneType' object has no attribute 'dtype'
提问by nilkn
Suppose I have a file test.csv which looks like this:
假设我有一个文件 test.csv ,它看起来像这样:
A,B,C
Hello,Hi,1
I'm attempting to read this into a Pandas dataframe:
我正在尝试将其读入 Pandas 数据帧:
cols = ['A','B','C']
col_types = {'A': str, 'B': str, 'C': int}
test = pd.read_csv('test.csv', names=cols, dtype=col_types)
This produces the error
这会产生错误
AttributeError: 'NoneType' object has no attribute 'dtype'
Any ideas?
有任何想法吗?
回答by chrisaycock
Your file already had the header row, so no need to specify any names.
您的文件已有标题行,因此无需指定任何名称。
In [6]: test = pd.read_csv('test.csv', dtype=col_types)
In [7]: test
Out[7]:
A B C
0 Hello Hi 1
In [8]: test.dtypes
Out[8]:
A object
B object
C int64
dtype: object

