debian-cpu-benchmark add sysbench install guide

debian-cpu-benchmark/bench.py

@@ -1,17 +1,20 @@
-#!/usr/bin/env python3
-
 import subprocess, multiprocessing as mp, pandas as pd
 
-subprocess.run("sudo apt-get update && sudo apt-get install -y sysbench",
-               shell=True, stdout=subprocess.PIPE)
-
 def speed(core):
-    output = subprocess.getoutput(
-        f'sysbench cpu --threads={core} run | grep "events per second"')
-    output = float(output.split()[-1])
-    print(output)
-    return output
-
+    try:
+        output = subprocess.run(
+            f'sysbench cpu --threads={core} run | grep "events per second"',
+            shell=True, capture_output=True, text=True).stdout.split()[-1]
+        print(output)
+        return output
+    except:
+        print('\n'
+              'sudo apt-get update && sudo apt-get install -y sysbench'
+              '\tOR'
+              'brew install sysbench'
+              '\n')
+        raise
+        
 df = []
 for core in range(1, mp.cpu_count()+1):
     s = speed(core)