"
o = bytes ("helloworld","utf-8")
r = o.center
print (r)
"
the second line of python code above reported an error. The error prompt is as follows:
r = o.center
TypeError: center () argument 2 must be a byte string of length 1, not str
error indicates that the second parameter of the center () method must be a byte string of length 1.
there is no great god until how to define a byte string in python.