The Python Language Reference, Release 3.9.5 V W X Y Z value default parameter , 101 value of an object , 17 ValueError exception , 76 values $_{writing}$, 83 variable $_{free}$, 45 variable annotation , 128 virtual environment , 128 virtual machine , 128 while statement , 90, 96 Windows , 105 with statement , 41, 99 writing values , 83 xor $_{bitwise}$, 76 yield examples , 69 $_{expression}$, 67 $_{keyword}$, 67 statement , 88 Zen of Python , 128 ZeroDivisionError $_{exception}$, 75 Index 164