fix bilibili.py download audio error when lrc file length is less than 0.

src/you_get/extractors/bilibili.py

@@ -436,7 +436,9 @@ class Bilibili(VideoExtractor):
             self.title = song_info['data']['title']
 
             # get lyrics
-            self.lyrics = get_content(song_info['data']['lyric'])
+            lrc = song_info['data']['lyric']
+            if lrc is not None and len(lrc) > 0:
+                self.lyrics = get_content(lrc)
 
             api_url = self.bilibili_audio_api(sid)
             api_content = get_content(api_url, headers=self.bilibili_headers())

src/you_get/test.py

@@ -1,59 +0,0 @@
-import traceback
-import sys
-from you_get import common as you_get
-import io
-import os
-
-url = "https://www.bilibili.com/video/BV1GV411p7P9"
-path = os.path.dirname(os.path.realpath(__file__))
-
-def getJson(url):
-    from you_get import common as you
-    try:
-        __console__ = sys.stdout
-        f = io.StringIO()
-        sys.stdout = f
-        sys.argv = ['you-get', url, '--json']
-        you.main()
-        text = f.getvalue()
-        sys.stdout = __console__
-        print(text)
-    except:
-        traceback.print_exc()
-
-
-def getDefaultDownloadInfo(url):
-    try:
-        __console__ = sys.stdout
-        f = io.StringIO()
-        sys.stdout = f
-        sys.argv = ['you-get', url, '-u']
-        you_get.main()
-        text = f.getvalue()
-        sys.stdout = __console__
-        print(text)
-    except:
-        traceback.print_exc()
-
-
-def download(url, path):
-    try:
-        sys.argv = ['you-get', url, '-o', path, '--no-caption', '--debug']
-        you_get.main()
-    except:
-        traceback.print_exc()
-
-
-if __name__ == '__main__':
-    # only use one sentence, they all ok （使用如下的单条语句，都是可以正常打印的， 并且可以下载视频）
-    # both are cant download video with combine （但是将语句组合使用，打印出的结果就有问题了， 并且无法下载视频）
-
-    # use these lines, print double json text （使用如下语句，将会打印出两次 json 解析数据）
-    getDefaultDownloadInfo(url)
-    getJson(url)
-    download(url, path)
-
-    # or use these lines, print triple json text （使用如下语句，仅仅改变排序，将会打印出三次 json 解析数据）
-    # getJson(url)
-    # getDefaultDownloadInfo(url)
-    # download(url, "save path")