why len(x) is zero when x=b''?

Question

I am new to python. Can anybody please explain how len() works in python3 for the below mentioned example?

x = b''
print(len(x))

The output comes out to be 0.

A SyntaxError: invalid syntax is displayed if any value other than b'' is used. (eg: a'', c'', bb'', b!)

Answer 1

the b prefix indicate that that string is a byte string. Therefore, the x is actually a sequence of bytes with a length of 0.

>>> len('')
0    
>>> len(b'')
0

Edit: as @Marco Bonelli has pointed out, b'' is a bytes object, which is not same as '' (a str object)

>>> ('' == '')
True
>>> (b'' == '')
False

Answer 2

First, I think the other answer from yesterday is correct. b'' is a bytes object, but bb'' or c'' or a'' is not any type of obj. :))).

But you can use some letter about that (example r(raw string)). Ex:

example_var = r"hi \n hello"
print(example_var)
#Do you think it's print hi
#hello? It's incorrect :>. I tried to do that in my IDE before. It's print hi \n hello

Thanks for very much reading.