- package imports package search paths recording for recursive calls pattern matching in strings about re module and pdb command-line debugger pep (python enhancement proposal) percent sign (%formatting expression operator system shell prompt performance considerations (see also benchmarkinglist comprehensions mro and program execution python alternatives slots perl programming language permutations - persistence (see object persistencepeterstim pexpect system pickle module about object persistence and object serialization and - persistence and storing objects plus (+operator adding numbers concatenating lists concatenating strings pmw extension package polymorphism about classes and - in functions oop considerations operator overloading and testing exception types portability positional arguments - pow built-in function pprint module pformat function pprint function usage considerations precedence rules print built-in function - - print operations (see also print statementabout built-in exception classes and - completion certificate - custom displays display formats - expression statements and file object methods and print built-in function - print stream redirection - quiz questions and answers standard output stream version considerations - - version-neutral - print statement about - common usage mistakes debugging code and numeric display formats and private attributes - procedures (see functionsprofile module program architecture about conceptual hierarchy modules and - program execution about alternative ides - alternative launch options - byte code compilation and - clicking file icons - debugging code - development considerations embedding calls exec built-in function and - frozen binaries future possibilities idle user interface - interactive prompt - interpreters and - model variations in - index