$_{method resolution order}$, 48 module , 48 module spec , 48 MRO , 48 mutable , 48 

## N 

named tuple , 48 namespace , 48 namespace package , 48 nested scope , 48 new-style class , 49 

## O 

-O command line option , 6 object , 49 -OO command line option , 6 

## P 

package , 49 parameter , 49 PATH , 8, 16, 18, 20, 2528 $_{path based finder}$, 49 $_{path entry}$, 49 $_{path entry finder}$, 49 $_{path entry hook}$, 49 path-like object , 49 PATHEXT , 20 $_{PEP}$, 50 $_{portion}$, 50 positional argument , 50 $_{prefix}$, 16 $_{provisional API}$, 50 provisional package , 50 PY_PYTHON , 29 Python 3000 , 50 Python Enhancement Proposals PEP 1 , 50 PEP 8 , 39 PEP 11 , 17, 33 PEP 238 , 45 PEP 278 , 52 PEP 302 , 45, 47 PEP 338 , 4 PEP 343 , 43 PEP 362 , 42, 49 PEP 370 , 6, 10 PEP 397 , 26 PEP 411 , 50 PEP 420 , 45, 48, 50 PEP 443 , 45 PEP 451 , 45 PEP 483 , 45 PEP 484 , 41, 45, 52 PEP 488 , 6 PEP 492 , 42, 43 

PEP 498 , 44 PEP 519 , 50 PEP 525 , 42 PEP 526 , 41, 52 PEP 528 , 26 PEP 529 , 11, 26 PEP 538 , 12 PEP 540 , 13 PEP 617 , 7, 9 PEP 3116 , 52 PEP 3155 , 50 PYTHON* , 46 PYTHONCOERCECLOCALE , 13 PYTHONDEBUG , 6 PYTHONDONTWRITEBYTECODE , 5 PYTHONHASHSEED , 6, 10 PYTHONHOME , 6, 8, 30, 31 Pythonic , 50 PYTHONINSPECT , 6 PYTHONIOENCODING , 12, 13 PYTHONLEGACYWINDOWSSTDIO , 10 PYTHONMALLOC , 11 PYTHONOLDPARSER , 7 PYTHONOPTIMIZE , 6 PYTHONPATH , 6, 8, 25, 30, 31, 36 PYTHONPROFILEIMPORTTIME , 7 PYTHONPYCACHEPREFIX , 8 PYTHONSTARTUP , 6 PYTHONUNBUFFERED , 7 PYTHONUTF8 , 8, 12, 26 PYTHONVERBOSE , 7 PYTHONWARNINGS , 7 

## Q 

-q command line option , 6 qualified name , 50 

## R 

-R command line option , 6 reference count , 51 regular package , 51 

## S 

-S command line option , 6 -s command line option , 6 $_{sequence}$, 51 $_{set comprehension}$, 51 $_{single dispatch}$, 51 $_{slice}$, 51 special $_{method}$, 51 $_{special method}$, 51 statement , 51 

