Join bytes into one string in python

Question

I have the following function that sends a string from ESP32 to Raspberry:

def rx_and_echo():
    sock.send("\nsend anything\n")
    while True:
        data = sock.recv(buf_size)
        if data:
            print(data)
            sock.send(data)

The format received by Raspberry is as follow:

b'T'
b'e'
b'x'
b't'

How to convert it into just Text?

Answer 1

you can keep the data Rx and keep pushing element by element instead of the list here:

lst = [b'T',b'e',b'x',b't']
x = ''.join([""+st.decode("utf-8") for st in lst])
sock.send(x)

#to have data as a list from socket
data_list = []
while True:
   data = sock.recv(buf_size)
   if data:
      #for certain length of data you want to accumulate and then send
      if len(data_list)>3:
         msg = ''.join([""+st.decode("utf-8") for st in data_list])
         sock.send(msg)
         data_list = []
      else:
         data_list.append(data)

Output:

Text

Answer 2

Something like this maybe?

def rx_and_echo():
    sock.send("\nsend anything\n")
    res = ''
    while True:
        data = sock.recv(buf_size)
        if data:
            res += data.decode()
    sock.send(res)

Edit: Actually, that doesn't seem right. What exactly does sock.recv return? Does this help?

def rx_and_echo():
    sock.send("\nsend anything\n")
    res = ''
    for b in sock.recv(buf_size)
        res += b.decode()
    sock.send(res)