Supplement to python-data types

 ' 
 1.int 
 2.str 
 3. Meta-zu tuple 
 Tu = (' name ') 
 TU1 = (' name ',) 
 Print (Tu,type (TU)) 
 Print (Tu1,type (TU1)) 
 4. List 
 When you loop through a list, if you delete some or some elements in the loop, the number of elements in the list changes, causing the index to change and error-prone 
 5. Dictionary 
 When a loop dictionary is deleted, if you delete some or some key-value pairs in the loop, the number of key-value pairs in the dictionary changes. Changes in length, error prone 
 6. Convert 
 1.int-->str:str (int) 
 STR-int:int (STR) strings must all be made up of numbers 
 bool--and STR: The STR (BOOL) Boolean value is converted to the string 
 Str---bool:bool (str) except for the empty string, the remainder is ture, and the null string has a Boolean value of false 
 INT---Bool:bool (    int) In addition to 0, all that remains is ture,0 Boolean value of False 
 bool-to Int:ture-->1 false-->0 
 Str---list split 
 List-->str join 
 Str--> List:list (str) 
 STR--> tuple (GANSO): Tuple (str) 
 Tuple (Ganso)-S TR:STR (tuple) 
 Tuple (Ganso)--list:list (tuple) 
 List--and tuple (Ganso): Tuple (list) 
 0, ', {},[], (), set () the corresponding bool value is False 
 
 

Tu = (all-in-a = list (TU)print= [4,2,6]print' Ab_c ' Print (list (s)) Print  = (1,2,3,4,5)print(str (a), type (str (a)), type (a))

Supplement to python-data types