How can I get the most specific value from a data stream?

Question

I tried to program a server (UDP Socket) to allow a data exchange between my PC and a sensor in testing machine. I receive from a sensor continually a data like this:

0.00;0.966458;4.75;0.000160

0.00;0.976958;4.75;0.000160

S reached (1)

0.00;0.986958;4.75;0.000160

0.00;1.001051;-2.25;0.000160

Each second I receive one or more lines. It depends on frequency, which I setup. All data, which I send to machine (commands) or receive (measured data from sensor) are "strings".

My goal: as soon I receive from a sensor: "S reached (1)", I want to save the next received line "0.00;0.986958;4.75;0.000160" as a variable. In my case the second value in this line shall be saved as a variable, "0.00;0.986958;4.75;0.000160".

As a first step I try to do something easier. When I receive "S reached (1)" the server has to do something.

while True:
    data, address = socket.recvfrom(1024)
    data = data.decode("utf-8")
    print(data)

    if data == "S reached (1)":
        print("Hello")

Unfortunately I don't get "Hello".

Answer 1

There is probably some trailing whitespace. Stripping it off should solve the problem:

data = data.decode("utf-8").strip()