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?

Does this answer your question? [Convert bytes to a string](https://stackoverflow.com/questions/606191/convert-bytes-to-a-string) — Tomerikoo, Feb 24 '22 at 08:09
Regarding your edit: That error seems quite easy to fix? Did you try fixing your indentations? — Tomerikoo, Feb 24 '22 at 08:14
Does this answer your question? ["inconsistent use of tabs and spaces in indentation"](https://stackoverflow.com/q/5685406/6045800) — Tomerikoo, Feb 24 '22 at 08:14
Does this answer your question? [I'm getting an IndentationError. How do I fix it?](https://stackoverflow.com/q/45621722/6045800) — Tomerikoo, Feb 24 '22 at 08:17
Yes, tab error is fiexed. But it sends only the first letter — asdfasdf, Feb 24 '22 at 08:18

Yodawgz0 · Answer 1 · 2022-02-24T08:27:31.620

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

jonbulz · Answer 2 · 2022-02-24T08:25:42.290

-1

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)

edited Feb 24 '22 at 08:25

answered Feb 24 '22 at 08:12

jonbulz

61
4

Same, TabError: inconsistent use of tabs and spaces in indentation – asdfasdf Feb 24 '22 at 08:14
TabError fixed, but it sends only first letter – asdfasdf Feb 24 '22 at 08:17

Join bytes into one string in python

2 Answers2