Install libppi-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libppi-perl
module to parse, analyze and manipulate Perl code
PPI provides the ability to parse, analyze and manipulate Perl code without actually executing the code, by implementing a lexer similar to what perl has itself internally. . The purpose of PPI is not to parse Perl Code, but to parse Perl Documents. By making this distinction and treating the problem this way, one could analyze files containing Perl source code in isolation from any other resources and without executing it, including other libraries. A significant feature of PPI is the ability to analyze Perl source code without requiring an instance of perl to run alongside or inside the parser.