Python3 's bytes and str

Python3 does not mix str and bytes in any implicit way, which makes the distinction between the two particularly clear, that when using Python, you cannot stitch strings and byte packets, or search for strings inside a byte packet (and vice versa). It is also not possible to tell a string to pass in a function that has a byte packet (or vice versa). In any case, the boundary between the string and the byte packet is inevitable, which is to explain the conversion between the string and the byte packet:

Usually in Python the data is transmitted in binary format, so the data is converted to binary before the data is transmitted;

In encoding or decoding should specify a specific format, otherwise the default system encoding format, such as UTF-8, as shown in:

Python3 's bytes and str