Extraction of s-farnesyl cysteine, s-palmitoyl cysteine, disulfide , metal binding

please tell a method to extract the s-farnesyl cysteine, s-palmitoyl cysteine, disulfide, and metal-binding from the feature key and function of the UniProt database

a. ) python code
b.) Perl script
c.) awk script to edit in the gff files or the text files