Python---- query memory address, small data pool, encoding

#id Query memory address. 
name='alex' 
print(id(name)) 
name1='alex' 
name2='alex' 
print(name1==name2) 
# =Assignment operation==Compare the same value 
#isThe memory address is the same #Small 

data pool. Int str is within a certain range, if the two values ​​are the same, in order to save memory, share a memory address. 

# str 1. If there are non-letter elements, it is not a small data pool. 
# int -5~~256 
# 2. A single letter *int (21) exists in a small data pool. 
#The rest of the types do not exist 
#                         Encoding
 # with open('The first exam--Li Jinchao.py',encoding='utf-8')as f1: 
# print(f1.read(),type(f1. read())) 
name='alex' 
name1=b'alex' 
print(name,type(name))