Can'；t使用python URL库解析Google标题

我无法分析Google搜索结果：

def extracter(url,key,change):
    if " " in key:
        key=key.replace(" ",str(change))
    url=url+str(key)
    response=ur.Request(url, headers={'User-Agent': 'Mozilla/5.0'})
    sauce =ur.urlopen(response).read()
    soup=bs(sauce,"html.parser")
    return soup    

def google(keyword):
    soup = extracter("https://www.google.com/search?q=",str(keyword),"+")
    search_result = soup.findAll("h3",attrs={"class":"LC20lb"})
    print(search_result)
google("tony stark")

输出：

[]

---

我只是简单地更改了标题，效果很好：

headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36'}

结果:

[<h3 class="LC20lb"><span dir="ltr">Tony Stark (Marvel Cinematic Universe) - Wikipedia</span></h3>, <h3 class="LC20lb"><span dir="ltr">Tony Stark / Iron Man - Wikipedia</span></h3>, <h3 class="LC20lb"><span dir="ltr">Iron Man | Marvel Cinematic Universe Wiki | FANDOM ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">Tony Stark (Earth-199999) | Iron Man Wiki | FANDOM ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">Is Tony Stark Alive As AI? Marvel Fans Say Tony Stark ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">'Avengers: Endgame' Might Not Have Been the End of Tony ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">Robert Downey Jr to RETURN to MCU as AI Tony Stark - ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">Avengers Endgame theory: Tony Stark is backed up as AI ...</span></h3>]

[托尼·斯塔克（惊奇漫画电影世界）-维基百科，托尼·斯塔克/钢铁侠-维基百科，钢铁侠|惊奇漫画电影世界维基|粉丝…，托尼·斯塔克（地球-199999）|铁人维基|粉丝群…，托尼·斯塔克还活着吗？惊奇漫画粉丝说托尼·斯塔克…，《复仇者：终局》可能不是托尼的结局…，小罗伯特·唐尼回到MCU扮演AI托尼·斯塔克-…，复仇者终局论：托尼·斯塔克被支持为AI…]

我只是简单地更改了标题，效果很好：

headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36'}

结果:

[<h3 class="LC20lb"><span dir="ltr">Tony Stark (Marvel Cinematic Universe) - Wikipedia</span></h3>, <h3 class="LC20lb"><span dir="ltr">Tony Stark / Iron Man - Wikipedia</span></h3>, <h3 class="LC20lb"><span dir="ltr">Iron Man | Marvel Cinematic Universe Wiki | FANDOM ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">Tony Stark (Earth-199999) | Iron Man Wiki | FANDOM ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">Is Tony Stark Alive As AI? Marvel Fans Say Tony Stark ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">'Avengers: Endgame' Might Not Have Been the End of Tony ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">Robert Downey Jr to RETURN to MCU as AI Tony Stark - ...</span></h3>, <h3 class="LC20lb"><span dir="ltr">Avengers Endgame theory: Tony Stark is backed up as AI ...</span></h3>]

[托尼·斯塔克（惊奇漫画电影世界）-维基百科，托尼·斯塔克/钢铁侠-维基百科，钢铁侠|惊奇漫画电影世界维基|粉丝…，托尼·斯塔克（地球-199999）|铁人维基|粉丝群…，托尼·斯塔克还活着吗？惊奇漫画粉丝说托尼·斯塔克…，《复仇者：终局》可能不是托尼的结局…，小罗伯特·唐尼回到MCU扮演AI托尼·斯塔克-…，复仇者终局论：托尼·斯塔克被支持为AI…]