data_string = joincurrent_datadecodeutf-8 ^^^^^^^^^^^^^^^^^^^^^TypeError sequence item 0 expected str instance bytes found

The error message suggests that the current_data variable contains bytes instead of strings. The join() function expects a sequence of strings, so you need to convert the bytes to strings before joining them.

Here's an example of how you can decode the bytes to strings before joining:

data_string = ''.join(data.decode('utf-8') for data in current_data)

In this code, each data element in current_data is decoded using the UTF-8 encoding and then joined together to form the data_string.