pandas to_csv，我错在哪里
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to_csv, Where am I wrong
提问by yun
I have this code
我有这个代码
import numpy as np
import pandas as pd
import csv
odata = pd.read_csv('email.csv')
data = odata.drop('content', axis=1, inplace=True)
data.to_csv('email-out.csv', index=False, sep=',')
And I got error like that:
我得到了这样的错误：
Traceback (most recent call last):
File "cut.py", line 7, in <module>
data.to_csv('email-out.csv', index=False, sep=',')
AttributeError: 'NoneType' object has no attribute 'to_csv'
Where am I wrong? help me..please
我哪里错了？请帮帮我
回答by Mac
Change this line:
改变这一行：
data = odata.drop('content', axis=1, inplace=True)
to this:
对此：
data = odata.drop('content', axis=1)
The inplaceflag causes the operation to happen in-place and return None, instead of creating a new dataframe.
该inplace标志导致操作就地发生并返回None，而不是创建新的数据帧。
If you really dowant the drop to happen in place, the alternative is to replace your code with something like the following:
如果你真的这样做要下降到位的情况发生，另一种方法是用类似于下面的东西来取代你的代码：
odata = pd.read_csv('email.csv')
odata.drop('content', axis=1, inplace=True)
odata.to_csv('email-out.csv', index=False, sep=',')
Please refer to the documentationfor more info.
请参阅文档以获取更多信息。
