how to extract data in between parathasis and append at the end of the line using python programing. : File.txt

first_name NVARCHAR2(15) NOT NULL,
middle_name NVARCHAR2(20) NOT NULL,
last_name NVARCHAR2(11) NOT NULL,

output i need:->output.txt
first_name NVARCHAR2(15) NOT NULL,15
middle_name NVARCHAR2(20) NOT NULL,20
last_name NVARCHAR2(11) NOT NULL,11

how to extract data in File between parathasis and append at the end of the line using python programing. 