Python Pandas 错误：'DataFrame' 对象没有属性 'loc'
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Pandas error: 'DataFrame' object has no attribute 'loc'
提问by Nyxynyx
I am new to pandasand is trying the Pandas 10 minute tutorial with pandas version 0.10.1. However when I do the following, I get the error as shown below. print dfworks fine.
我是新手pandas，正在尝试使用 Pandas 0.10.1 版的 Pandas 10 分钟教程。但是，当我执行以下操作时，出现如下所示的错误。print df工作正常。
Why is .locnot working?
为什么.loc不工作？
Code
代码
import numpy as np
import pandas as pd
df = pd.DataFrame(np.random.randn(6,4), index=pd.date_range('20130101', periods=6), columns=['A','B','C','D'])
df.loc[:,['A', 'B']]
Error:
错误：
AttributeError Traceback (most recent call last)
<ipython-input-4-8513cb2c6dc7> in <module>()
----> 1 df.loc[:,['A', 'B']]
C:\Python27\lib\site-packages\pandas\core\frame.pyc in __getattr__(self, name)
2044 return self[name]
2045 raise AttributeError("'%s' object has no attribute '%s'" %
-> 2046 (type(self).__name__, name))
2047
2048 def __setattr__(self, name, value):
AttributeError: 'DataFrame' object has no attribute 'loc'
采纳答案by Andy Hayden
locwas introduced in 0.11, so you'll need to upgrade your pandas to follow the 10minute introduction.
回答by Ryan Saxe
I am finding it odd that locisn't working on mine because I have pandas 0.11, but here is something that will work for what you want, just use ix
我发现它对我的loc不起作用很奇怪，因为我有 Pandas 0.11，但这里有一些可以满足你想要的东西，只需使用ix
df.ix[:,['A','B']]
回答by fstang
I came across this question when I was dealing with pyspark DataFrame. So, if you're also using pyspark DataFrame, you can convert it to pandas DataFrame using toPandas() method.
我在处理 pyspark DataFrame 时遇到了这个问题。因此，如果您还使用 pyspark DataFrame，则可以使用 toPandas() 方法将其转换为 Pandas DataFrame。
