熊猫-选择多个数据框条件

Question

I have a DataFrame with multiple columns and I need to set the criteria to access specific values from two different columns. I'm able to do it successfully on one column as shown here:

status_filter = df[df['STATUS'] == 'Complete']

But I'm struggling to specify values from two columns. I've tried something like this but get errors:

status_filter = df[df['STATUS'] == 'Complete' and df['READY TO INVOICE'] == 'No']

It may be a simple answer, but any help is appreciated.

Answer 1

您的代码有两个非常小的错误：1）需要两个或多个条件的括号，以及2）您需要在两个条件之间使用＆号：

status_filter = df[(df['STATUS'] == 'Complete') & (df['READY TO INVOICE'] == 'No')]

Answer 2

status_filter = df.ix[(df['STATUS'] == 'Complete') & (df['READY TO INVOICE'] == 'No'),]

别客气

Answer 3

您可以使用：

status_filter = df[(df['STATUS'] == 'Complete') &  (df['READY TO INVOICE'] == 'No')]