'NoneType' 对象没有属性 'group' [英] 'NoneType' object has no attribute 'group'

问题描述

有人可以帮我处理这个代码吗?我正在尝试制作一个可以播放视频的 python 脚本，我找到了这个下载 Youtube 视频的文件.我不完全确定发生了什么，我无法弄清楚这个错误.

Can somebody help me with this code? I'm trying to make a python script that will play videos and I found this file that download's Youtube videos. I am not entirely sure what is going on and I can't figure out this error.

错误:

AttributeError: 'NoneType' object has no attribute 'group'

追溯:

Traceback (most recent call last):
  File "youtube.py", line 67, in <module>
    videoUrl = getVideoUrl(content)
  File "youtube.py", line 11, in getVideoUrl
    grps = fmtre.group(0).split('&amp;')

代码片段:

(第 66-71 行)

(lines 66-71)

content = resp.read()
videoUrl = getVideoUrl(content)

if videoUrl is not None:
    print('Video URL cannot be found')
    exit(1)

(第 9-17 行)

def getVideoUrl(content):
    fmtre = re.search('(?<=fmt_url_map=).*', content)
    grps = fmtre.group(0).split('&amp;')
    vurls = urllib2.unquote(grps[0])
    videoUrl = None
    for vurl in vurls.split('|'):
        if vurl.find('itag=5') > 0:
            return vurl
    return None

推荐答案

错误在你的第 11 行，你的 re.search 没有返回结果，即 None，然后您尝试调用 fmtre.group 但 fmtre 是 None，因此 AttributeError.

The error is in your line 11, your re.search is returning no results, ie None, and then you're trying to call fmtre.group but fmtre is None, hence the AttributeError.

你可以试试:

def getVideoUrl(content):
    fmtre = re.search('(?<=fmt_url_map=).*', content)
    if fmtre is None:
        return None
    grps = fmtre.group(0).split('&amp;')
    vurls = urllib2.unquote(grps[0])
    videoUrl = None
    for vurl in vurls.split('|'):
        if vurl.find('itag=5') > 0:
            return vurl
    return None

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