肯定數據類型和類型轉換

# 肯定數據類型,傳入的數是一個類型，返回True
print(isinstance('111',str))
print(isinstance(111,str))
print(isinstance([1,2,3],list))
print(isinstance({1:2},dict))
### 
True
False
True
True

data = b'hello s11'

data = str(data, encoding='utf-8')
print(data,type(data))


data = bytes(data, encoding='utf-8')
print(data,type(data))