Solved Python 2.4 build compatibilty and flake8 warnings

speedtest_cli.py

@@ -739,14 +739,15 @@ def speedtest():
     if args.csv:
         filename = args.csv
         file_exists = os.path.isfile(filename)
-
         try:
-            with open(filename, 'ab+') as csvfile:
+            csvfile = open(filename, 'ab+')
+            try:
 
                     headers = ['Test server', 'Date/Time', 'Latency (ms)',
                                'Dowload Speed (Kb/s)', 'Upload Speed (Kb/s)']
                     csvwriter = csv.DictWriter(csvfile, delimiter=';',
-                                           lineterminator='\n',fieldnames=headers)
+                                               lineterminator='\n',
+                                               fieldnames=headers)
 
                     server = '%(sponsor)s (%(name)s) [%(d)0.2f km]' % best
                     current_time = datetime.datetime.now().isoformat()
@@ -754,7 +755,6 @@ def speedtest():
                     ping = float(round(best['latency'], 2))
                     ulspeedk = int(round((ulspeed / 1000) * 8, 0))
 
-
                     if not file_exists:
                         csvwriter.writeheader()
 
@@ -762,8 +762,8 @@ def speedtest():
                                         'Date/Time': current_time,
                                         'Latency (ms)': ping,
                                         'Dowload Speed (Kb/s)': dlspeedk,
-                                    'Upload Speed (Kb/s)': ulspeedk
-                                     })
+                                        'Upload Speed (Kb/s)': ulspeedk})
+            finally:
                 csvfile.close()
         except IOError:
             print_("Unable to write CSV file")