143 Index Python Tutorial, Release 3.9.5 PEP 498 , 110 PEP 519 , 116 PEP 525 , 108 PEP 526 , 107, 118 PEP 3107 , 28 PEP 3116 , 118 PEP 3147 , 44 PEP 3155 , 116 $_{Pythonic}$, 116 PYTHONPATH , 43, 44 PYTHONSTARTUP , 106 qualified name , 116 reference count , 117 regular package , 117 RFC RFC 2822 , 83 search $_{path}$,$_{module}$ , 43 $_{sequence}$, 117 $_{set comprehension}$, 117 $_{single dispatch}$, 117 $_{slice}$, 117 special $_{method}$, 117 $_{special method}$, 117 statement , 117 $_{for}$, 17 strings, documentation , 20, 28 style $_{coding}$, 29 sys module , 44 text encoding , 117 text file , 117 triple-quoted string , 117 $_{type}$, 117 type alias , 117 $_{type hint}$, 118 universal newlines , 118 variable annotation , 118 virtual environment , 118 virtual machine , 118 $_{Zen of Python}$, 118 Z V U T S R Q