fix wrong return type annotation in encrypt function's docstring
In python2, it isn't wrong(str == bytes in python2) but this annotation is wrong in python3 (str != bytes in python3)
So, Pycharm display a warning that Unresolved attribute reference 'decode' for class 'str'
fix wrong return type annotation in encrypt function's docstring In python2, it isn't wrong(str == bytes in python2) but this annotation is wrong in python3 (str != bytes in python3) So, Pycharm display a warning that
Unresolved attribute reference 'decode' for class 'str'