AttributeError：“ NoneType”对象没有属性“ group” {for instagram}

Question

Lokesh-mac-mini-pro-2:instabot.py-master Lokeshmacminipro$ python example.py
02.09.2018_10:03 Instabot v1.2.0 started at 02.09.2018 10:03:

02.09.2018_10:03 Trying to login as moneshrallapalli...
Traceback (most recent call last):
  File "example.py", line 52, in <module>
    unfollow_whitelist=['example_user_1', 'example_user_2'])
  File "/Users/lokemone/Desktop/instabot.py-master/src/instabot.py", line 234, in __init__
    self.login()
  File "/Users/lokemone/Desktop/instabot.py-master/src/instabot.py", line 303, in login
    self.user_id = ui.get_user_id_by_login(self.user_login)
  File "/Users/lokemone/Desktop/instabot.py-master/src/userinfo.py", line 42, in get_user_id_by_login
    json_info = json.loads(re.search('{"activity.+show_app', info.text, re.DOTALL).group(0)+'":""}')
AttributeError: 'NoneType' object has no attribute 'group'

Lokesh-mac-mini-pro-2:instabot.py-master Lokeshmacminipro$ 

please tell how to avoid

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

Answer 1

This error means the value does not contain anything ie It has None values. Check it before grouping.

Answer 2

It is evident from the traceback that the below line is responsible for the exception.

json_info = json.loads(re.search('{"activity.+show_app', info.text, re.DOTALL).group(0)+'":""}')

It looks like you are trying to fetch some specific things from the info.text and then make a json with it. In that case, your approach needs a little modification.

Let's first fix the search part. It should be,

matched_string = re.search('activity.+show_app', info.text, re.DOTALL).group(0)

The specific Exception you are getting is because of this line. The pattern you were searching was not in that string. So, you can just add a try/catch or if/else there to avoid that scenario.

Then make it a valid json explicitly, by doing:

 valid_json = "{" + matched_string + ": ''}"

Finally, load it with json module.

 valid_dict = json.loads(valid_json)

So, in one line, you can do,

try:
    some_var = json.loads("{" + re.search('activity.+show_app', info.text, re.DOTALL).group(0) + ": '' }")
except AttributeError:
    print("Couldn't find that specific pattern")

Hope this helps.