To be able to extract data from Facebook using a python code you need to register as a developer on Facebook and then have an access token. Here are the steps for it.
Go to link developers.facebook.com, create an account there. Go to
link developers.facebook.com/tools/explorer. Go to “My apps” drop
down in the top right corner and select “add a new app”. Choose a
display name and a category and then “Create App ID”. Again get back
to the same link developers.facebook.com/tools/explorer. You will see
“Graph API Explorer” below “My Apps” in the top right corner. From
“Graph API Explorer” drop down, select your app. Then, select “Get
Token”. From this drop down, select “Get User Access Token”. Select
permissions from the menu that appears and then select “Get Access
Token.” Go to link developers.facebook.com/tools/accesstoken. Select
“Debug” corresponding to “User Token”. Go to “Extend Token Access”.
This will ensure that your token does not expire every two hours.
Python Code to Access Facebook Public Data:
Go to link https://developers.facebook.com/docs/graph-api if want to collect data on anything that is available publicly. See https://developers.facebook.com/docs/graph-api/reference/v2.7/. From this documentation, choose any field you want from which you want to extract data such as “groups” or “pages” etc. Go to examples of codes after having selected these and then select “facebook graph api” and you will get hints on how to extract information. This blog is primarily on getting events data.
First of all, import ‘urllib3’, ‘facebook’, ‘requests’ if they are already available. If not, download these libraries. Define a variable token and set its value to what you got above as “User Access Token”.
token= ‘aiufniqaefncqiuhfencioaeusKJBNfljabicnlkjshniuwnscslkjjndfi’
Getting list of Events:
Now to find information on events for any search term say “Poetry” and limiting those events’ number to 10000:
graph = facebook.GraphAPI(access_token=token, version = 2.7)
events = graph.request(‘/search?q=Poetry&type=event&limit=10000’)
This will give a dictionary of all the events that have been created on Facebook and has string “Poetry” in its name. To get the list of events, do:
eventList = events[‘data’]
Extracting all information for a event from the list of events extracted above:
Get the EventID of the first event in the list by
eventid = eventList[1][‘id’]
For this EventID, get all information and set few variables which will be used later by:
event1=graph.get_object(id=eventid,fields=’attending_count,can_guests_invite,category,cover,declined_count,description,end_time,guest_list_enabled,interested_count,is_canceled,is_page_owned,is_viewer_admin,maybe_count,noreply_count,owner,parent_group,place,ticket_uri,timezone,type,updated_time’)
attenderscount = event1[‘attending_count’]
declinerscount = event1[‘declined_count’]
interestedcount = event1[‘interested_count’]
maybecount = event1[‘maybe_count’]
noreplycount = event1[‘noreply_count’]
Getting the list of all those who are attending an event and converting the response into json format:
attenders = requests.get(“https://graph.facebook.com/v2.7/"+eventid+"/attending?
access_token="+token+”&limit=”+str(attenderscount))
attenders_json = attenders.json()
Getting the admins of the event:
admins = requests.get(“https://graph.facebook.com/v2.7/"+eventid+"/admins?
access_token="+token)
admins_json = admins.json()
And similarly you can extract other information such as photos/videos/feed of that event if you want.
Go to https://developers.facebook.com/docs/graph-api/reference/event/ and see “Edges” part in the documentation.
