Unable to subset the data from Pandas dataframe

Question

I tried to create a subset from Pandas dataframe based on some conditions. I was able to create two subsets, but get a syntax error when trying to create another subset.

The dataframe is.csv file with column headings: Number, Environment, Phase, Type, Planned end date, Closure code, Closure Subcategory, Incident Caused by Change, Pending Change. What code should I try to create a subset using "Planned end date" wherein the records which have Planned end date more than 4 days from today's date should be in a different subset? I'd like to create a different subset with all "Successful" and "FULLY SUCCESSFUL" records, and also a different subset with has null values for Incident Caused by Change and Pending Change.

Original dataframe:

Subset error:

No subset error:

Answer 1

When you use the format df2.Closure Subcategory ==... , python uses only Closure as the column name, and assumes that everything after the space is another part of the statement. So when it sees the word "Subcategory" on its own after a dataframe column, it throws an error.

As @Alexander Cecile mentioned in the comment section, use the other method to call a column, eg df2['Closure Subcategory'] ==... , and the subset would be created.