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How HTTP works 1. Request('what', 'how') : Client(Browser) → Server ↑Through HTTP Request Message 2. Response : Server → Client(Browser) ↑Contains request information Message has Method(which means 'how') HEADER BODY GET VS POST GET POST Whether data is exposed on URL Yes No URL Example http://localhost:8080/items/?item_id=123&q=100 http://localhost:8080/items Data Location Header Body Caching A..

copy Under the same object, one can change one copy without changing the other. Therefore, if one of them changed, the other one will be changed affected by changed one. a = [1, 2, 3, 4] b = a # shallow copy print(b) # [1, 2, 3, 4] b[2] = 100 print(b) # [1, 2, 100, 4] print(a) # [1, 2, 100, 4] copy.copy Shallow copy, once copy from one to another one, its reference is same object. Copy only the ..