python中字符串以u b r f开头的意思

bytes字节符，打印以b开头

>>> b= b'have'
>>> print(b)
b'have'

非转义原生字符

>>> print(r'have\n')
have\n
>>> 

 

unicode编码字符，python3默认字符串编码方式

>>> print(u'have\n')
have

>>> 

https://blog.csdn.net/qq_16234613/article/details/79448203