2021-03-11 comp9021 class 8 notes

review

• Generate list
  
• pop function
  

Namespace - namespaces

Official documents ：Scopes and Namespaces Example

python function The medium variable is global still local?

• stay function The variables in are either all local, Or all of it global, It cannot be mixed as shown in the figure below .
  
• But you can define the same name in the nested function Local Variable , Here's the picture ：
  
• Nested functions refer to variables of the outer function ：
  
• The nested function modifies the variables of the outer function , Without modifying the global variables .
  
• Affirming nonlocal variable , The outer function needs to define the variable first , Otherwise, it will report a mistake
  

Combine - union

Official documents ：python - sets
The union operation is only used for set, about List, Can be added first , Re turn set.