pandas 以字符串形式返回索引值
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Return index value as string
提问by Stephen Juza
I'm trying to return the index of a value as a string. Other questions on here that I saw had it return indexes as lists.
我正在尝试将值的索引作为字符串返回。我在这里看到的其他问题将索引作为列表返回。
The error that is thrown is: You returned a variable of type and we expected a type of
抛出的错误是：您返回了一个类型的变量，而我们期望的类型为
My code:
我的代码：
String_to_be_returned=(df['Column'].index[df['Column']==2])
Example:
例子：
When I print String_to_be_returned, I get this:
当我打印 String_to_be_returned 时，我得到了这个：
Index(['United States'], dtype='object', name='Country Name')
Index(['美国'], dtype='object', name='Country Name')
回答by jezrael
I think you need add [0]for select first value of indexwhich is array:
我认为您需要添加[0]select 第一个值index是array：
String_to_be_returned= df[df['Column']==2].index[0]
Sample:
样本：
df = pd.DataFrame({'Column':[1,2,3],
'Column1':[4,5,6]
}, index=['Slovakia','United States','Mexico'])
print (df)
Column Column1
Slovakia 1 4
United States 2 5
Mexico 3 6
String_to_be_returned= df[df['Column']==2].index[0]
print (String_to_be_returned)
United States
String_to_be_returned= df.index[df['Column']==2][0]
print (String_to_be_returned)
United States
