python read iperf log and parse throughput

[jacklee26]

HI
i have a file which is iperf3's log file, I wish to get the Throughput value from the file.
I have written python code and would like to ask for any improvement on the code. MY code might not be good, I literally know it.
Any better way to accomplish it?

basically, I want is read the iperf lof file, and get the throughput value, such as 3.39 Gbits, and get the 3.39 value and print our and write into a new file.

 #!/usr/bin/python
result=""
last_line=""
lastResult_line=""
TPT=""
with open('iperf3.txt', 'r') as f:
    last_line = f.readlines()
    #lastResult_line="".join(last_line[-3:])
    #lastResult_line=lastResult_line.strip()
    last_line=last_line[-1].strip()
    
print("="*30)  
#print(lastResult_line)
#print(last_line)
TPT= last_line.split('                  ')
TPT=TPT[0].split(' ')[-2]
value= int(round(float(TPT)))
print(f"Orginal Throuhgput value: {TPT} Gbps")
print(f"after Round Value: {value}.0 Gbps") 

if value< 100:
    print("Iperf result: pass")
    result="Iperf Result: pass"
else:
    print("Iperf result: Fail")
    result="Iperf Result: Fail"
with open("testresult.txt", "a+") as f:
    # here, position is already at the end
    f.write(f"####Test4:{result}, Throughput:{value}.0 Mbps ####\n")
    f.write(f"{'='*20}Iperf3 Result{'='*20}\n")
    f.write(f"{last_line}\n")
    #f.write(f"{lastResult_line}\n")
    f.write(f"{'='*50}\n")
    f.write(f"Iperf Throughput:{TPT}GBytes,rounded=>{value}.0 Gbps. Result PASS\n")

iperf3.txt:
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 127.0.0.1, port 39756
[ 5] local 127.0.0.1 port 5201 connected to 127.0.0.1 port 39758
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 389 MBytes 3.26 Gbits/sec
[ 5] 1.00-2.00 sec 401 MBytes 3.37 Gbits/sec
[ 5] 2.00-3.00 sec 405 MBytes 3.40 Gbits/sec
[ 5] 3.00-4.00 sec 372 MBytes 3.12 Gbits/sec
[ 5] 4.00-5.00 sec 419 MBytes 3.51 Gbits/sec
[ 5] 5.00-6.00 sec 401 MBytes 3.36 Gbits/sec
[ 5] 6.00-7.00 sec 422 MBytes 3.54 Gbits/sec
[ 5] 7.00-8.00 sec 411 MBytes 3.45 Gbits/sec
[ 5] 8.00-9.00 sec 412 MBytes 3.45 Gbits/sec
[ 5] 9.00-10.00 sec 410 MBytes 3.44 Gbits/sec
[ 5] 10.00-10.01 sec 896 KBytes 1.47 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.01 sec 3.95 GBytes 3.39 Gbits/sec receiver

[Gribouillis]

You could try this

from collections import deque

with open('iperf3.txt', 'r') as f:
    last_line = deque(f, maxlen=1)[-1].strip()
...

[Yoriz]

Note: no error checking added

def file_last_line(file_path):
    line = ""
    with open(file_path, "r") as file:
        for line in file:
            pass
    return line.strip()


def throughput_text(throughput_line):
    throughput = throughput_line.split(" ")[-3]
    rounded_throughput = round(float(throughput))
    state = "pass" if rounded_throughput < 100 else "Fail"
    return (
       f"####Test4:Iperf Result: {state}, Throughput:{rounded_throughput}.0 Mbps ####\n"
        f"{'='*20}Iperf3 Result{'='*20}\n"
        f"{throughput_line}\n"
        f"{'='*50}\n"
        f"Iperf Throughput:{throughput}GBytes,rounded=>{rounded_throughput}.0 Gbps. Result PASS\n"
    )


def main():
    last_line = file_last_line(iperf3.txt")
    text = throughput_text(last_line)
    with open(testresult.txt", "a+") as file:
        file.write(text)


if __name__ == "__main__":
    main()

[jacklee26]

Note: no error checking added

hi
what if my iperf3.txt is like this: please refer attachment

[ 5] local 127.0.0.1 port 39598 connected to 127.0.0.1 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 541 MBytes 4.53 Gbits/sec 0 3.12 MBytes
[ 5] 1.00-2.00 sec 631 MBytes 5.31 Gbits/sec 0 3.12 MBytes
[ 5] 2.00-3.00 sec 578 MBytes 4.83 Gbits/sec 0 3.12 MBytes
[ 5] 3.00-4.00 sec 561 MBytes 4.71 Gbits/sec 0 3.12 MBytes
[ 5] 4.00-5.00 sec 512 MBytes 4.30 Gbits/sec 0 3.12 MBytes
[ 5] 5.00-6.00 sec 571 MBytes 4.80 Gbits/sec 0 3.12 MBytes
[ 5] 6.00-7.00 sec 581 MBytes 4.88 Gbits/sec 0 3.12 MBytes
[ 5] 7.00-8.00 sec 639 MBytes 5.36 Gbits/sec 0 3.12 MBytes
[ 5] 8.00-9.00 sec 651 MBytes 5.45 Gbits/sec 0 3.12 MBytes
[ 5] 9.00-10.00 sec 620 MBytes 5.21 Gbits/sec 0 3.12 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 5.75 GBytes 4.94 Gbits/sec 0 sender
[ 5] 0.00-10.00 sec 5.75 GBytes 4.94 Gbits/sec receiver

[Yoriz]

If the input files vary, you need to find out what all the variations are before you can figure out if a solution to extract the correct value can be found.