Type Error

[ghost]

Besides having forgotten the parentheses around all the "print" statements in the script for the first part of your tutorial, I get the following error:
"TypeError: a bytes-like object is required, not 'str'" on line 20.

[Miopas]

I met the same problem when I used python3. Then I tried to use python2 to run the code. This error didn't appear.

[yqlicglingfei]

When using python3, the problem occurs.