implemented a wrapper helping with verbosity

coub-dl.py

@@ -6,6 +6,7 @@ from enum import Enum
 from datetime import timedelta
 from math import floor
 from argparse import ArgumentParser
+from functools import wraps
 
 
 
@@ -31,6 +32,16 @@ class File(Enum):
     FRACTION = 3
     OUTPUT = 4
 
+def call_verbose(before_message=''):
+    def wrap(f):
+        @wraps(f)
+        def wrapper(*args, **kwargs):
+            print_opt(before_message+' ', end='', flush=True)
+            f(*args, **kwargs)
+            print_opt('Done!')
+        return wrapper
+    return wrap
+
 def print_opt(*args, **kwargs):
     if VERBOSE:
         print(*args, **kwargs)
@@ -48,20 +59,20 @@ def getDuration(ffprobe_output):
         raise ValueError('Cannot process ffprobe output!')
     return duration
 
-def downloadStreams():
-    print_opt('Downloading audio stream... ', end='', flush=True)
+@call_verbose(before_message='Downloading audio stream...')
+def download_audio_stream():
     call(('youtube-dl', '--ignore-config',
                         '--extract-audio',
                         '--output', '{}.%(ext)s'.format(FILES[Stream.AUDIO]),
           URL),
          stdout=DEVNULL, stderr=DEVNULL)
-    print_opt('Done!')
-    print_opt('Downloading video stream... ', end='', flush=True)
+
+@call_verbose(before_message='Downloading video stream...')
+def download_video_stream():
     call(('youtube-dl', '--ignore-config',
                         '--output', '{}.%(ext)s'.format(FILES[Stream.VIDEO]),
           URL),
          stdout=DEVNULL, stderr=DEVNULL)
-    print_opt('Done!')
 
 def readExtensions():
     for file in listdir():
@@ -116,7 +127,8 @@ if exists(FILES[File.OUTPUT]):
         remove(FILES[File.OUTPUT])
 
 # download streams and update FILE dict with extensions
-downloadStreams()
+download_audio_stream()
+download_video_stream()
 readExtensions()
 
 # get stream lengths via ffprobe