26、for-in Used to cycle within a certain range , The cycle range is limited
answer ： Yes
Test point analysis ： Examine for loop ,for-in Statements are used in a specific sequence or interval , It is limited. , So it's right
27、 The definition method of Yuanzu is exactly the same as that of the list
answer ： wrong
Test point analysis ： Check the knowledge of Yuanzu and list , Yuanzu passed tuple Data class lines , And is enclosed by a pair of parentheses , The list is made by list Data type definition , Included by a pair of brackets ; So the mistake
28、 The key in the dictionary must be unique , Must be immutable data type , Such as a string 、 Number or list
answer ： wrong
Test point analysis ： Check the dictionary ,
