【保留字】的原文是【Reserved Word】,有時候也稱為【關鍵字】,英文稱為【Keyword】
acos and array asin assert atan
break class close continue cos Data
def del e elif else except
exec exp fabs float finally floor
for from global if import in
input int is lambda log log10
not open or pass pi print
raise range return sin sqrt tan
try type while write zeros