>>>importre# should match>>>regex=re.compile("[\ua7aa-\uffff]",re.IGNORECASE)>>>print(regex.match("\u0266"))<re.Matchobject;span=(0,1),match='ɦ'># should not match>>>regex=re.compile("[\ua7aa-\U00010000]",re.ASCII|re.IGNORECASE)>>>print(regex.match("\u0266"))<re.Matchobject;span=(0,1),match='ɦ'># must be related to case folding, since \ua7aa folds to \u0266>>>regex=re.compile("[\ua7ab-\U00010000]",re.ASCII|re.IGNORECASE)>>>print(regex.match("\u0266"))None# correct behavior when upper bound is in BMP>>>regex=re.compile("[\ua7aa-\uffff]",re.ASCII|re.IGNORECASE)>>>print(regex.match("\u0266"))None