python的bug吗?while循环里一带try except 他就说break在循环外,去掉try except就不报错了,正常运行了,这是为嘛呀
```python
i=0
while True:
h='https://club.jd.com/comment/productPageComments.action?&productId=67308286187&score=3&sortType=6&page='
t='&pageSize=10&isShadowSku=0&fold=1'
url=h+str(i)+t
#请求头
headers={'User-Agent':
'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36'}
response=requests.get(url=url,proxies=proxies,headers=headers)
try:
json_data=response.json()
except:
#print(f"err data: ", response.text)
comments_list=json_data['comments']
time.sleep(random.randint(12,20))
i=i+1
print('----------------------正在爬取第',i,'页-------------------------------------------')
for commnet in comments_list:
content=commnet['content'] #评论内容
content=re.sub(r'[\t\n]','',content) #把评论的换行给删除
creationTime=commnet['creationTime'] #创建时间
productColor=commnet['productColor'] #产品款式
productSize=commnet['productSize'] #产品尺寸
nickname=commnet['nickname'] #用户名称
replyCount=commnet['replyCount'] #评论人数
score=commnet['score'] #评分
usefulVoteCount=commnet['usefulVoteCount']#点赞数
print(nickname,content,creationTime,score)
csv_writer.writerow([nickname,content,creationTime,productColor,productSize,replyCount,score,usefulVoteCount])
(random.randint(3,5))
if i>12:
break
f.close()
File "<ipython-input-11-8719c5777c67>", line 35
SyntaxError: 'break' outside loop
```
while, try except在同一级,try except进行缩进。然后try except中代码缩进。
i=0
while True:
h='https://club.jd.com/comment/productPageComments.action?&productId=67308286187&score=3&sortType=6&page='
t='&pageSize=10&isShadowSku=0&fold=1'
url=h+str(i)+t
#请求头
headers={'User-Agent':
'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36'}
response=requests.get(url=url,proxies=proxies,headers=headers)
try:
json_data=response.json()
except:
#print(f"err data: ", response.text)
comments_list=json_data['comments']
time.sleep(random.randint(12,20))
i=i+1
print('----------------------正在爬取第',i,'页-------------------------------------------')
for commnet in comments_list:
content=commnet['content'] #评论内容
content=re.sub(r'[\t\n]','',content) #把评论的换行给删除
creationTime=commnet['creationTime'] #创建时间
productColor=commnet['productColor'] #产品款式
productSize=commnet['productSize'] #产品尺寸
nickname=commnet['nickname'] #用户名称
replyCount=commnet['replyCount'] #评论人数
score=commnet['score'] #评分
usefulVoteCount=commnet['usefulVoteCount']#点赞数
print(nickname,content,creationTime,score)
csv_writer.writerow([nickname,content,creationTime,productColor,productSize,replyCount,score,usefulVoteCount])
(random.randint(3,5))
if i>12:
break;
f.close()
https://stackoverflow.nilmap.com/question?dest_url=https://stackoverflow.com/questions/2462566/python-break-outside-loop
这个你参考一下,希望对你有用。
但你这个不就是在循环外面吗
因为你把try写到循环外面了,前面要加4个空格
你的try,except写在while循环的外面,break不到东西,自然报错了