Raspagem de dados no TWITTER

A simple script to scrape for Tweets using the Python package requests to retrieve the content and Beautifullsoup4 to parse the retrieved content.

1. Motivation

Twitter has provided REST API's which can be used by developers to access and read Twitter data. They have also provided a Streaming API which can be used to access Twitter Data in real-time.

Most of the software written to access Twitter data provide a library which functions as a wrapper around Twitters Search and Streaming API's and therefore are limited by the limitations of the API's.

With Twitter's Search API you can only sent 180 Requests every 15 minutes. With a maximum number of 100 tweets per Request this means you can mine for 4 x 180 x 100 = 72.000 tweets per hour. By using TwitterScraper you are not limited by this number but by your internet speed/bandwith and the number of instances of TwitterScraper you are willing to start.

One of the bigger disadvantages of the Search API is that you can only access Tweets written in the past 7 days. This is a major bottleneck for anyone looking for older past data to make a model from. With TwitterScraper there is no such limitation.

Per Tweet it scrapes the following information:

• Username and Full Name
• Tweet-id
• Tweet-url
• Tweet text
• Tweet timestamp
• No. of likes
• No. of replies
• No. of retweets

2. Installation and Usage

To install twitterscraper:

(sudo) pip install twitterscraper

or you can clone the repository and in the folder containing setup.py

python setup.py install

2.2 The CLI

You can use the command line application to get your tweets stored to JSON right away. Twitterscraper takes several arguments:

• -h or --help Print out the help message and exits.
• -l or --limit TwitterScraper stops scraping when at least the number of tweets indicated with --limit is scraped. Since tweets are retrieved in batches of 20, this will always be a multiple of 20.
  Omit the limit to retrieve all tweets. You can at any time abort the scraping by pressing Ctrl+C, the scraped tweets will be stored safely in your JSON file.
• --lang Retrieves tweets written in a specific language. Currently 30+ languages are supported. For a full list of the languages print out the help message.
• -o or --output Gives the name of the output file. If no output filename is given, the default filename 'tweets.json' will be used.
• -d or --dump: With this argument, the scraped tweets will be printed to the screen instead of an outputfile. If you are using this argument, the --output argument doe not need to be used.

Below is an example of how twitterscraper can be used:

twitterscraper Trump --limit 100 --output=tweets.json

twitterscraper Trump -l 100 -o tweets.json

2.3 From within Python

You can easily use TwitterScraper from within python:

from twitterscraper import query_tweets
list_of_tweets = query_tweets("Trump OR Clinton", 10)

#print the retrieved tweets to the screen:
for tweet in query_tweets("Trump OR Clinton", 10):
    print(tweet)
    
#Or save the retrieved tweets to file:
file = open(“output.txt”,”w”) 
for tweet in query_tweets("Trump OR Clinton", 10):
    file.write(tweet.encode('utf-8')) 
file.close()

2.4 Composing advanced queries

You can use any advanced query twitter supports. Simply compile your query at https://twitter.com/search-advanced. After you compose your advanced search, copy the part of the URL between q= and the first subsequent &.

For example, from the URL https://twitter.com/search?l=&q=Trump%20near%3A%22Seattle%2C%20WA%22%20within%3A15mi%20since%3A2017-05-02%20until%3A2017-05-05&src=typd&lang=en

you need to copy the following part: Trump%20near%3A%22Seattle%2C%20WA%22%20within%3A15mi%20since%3A2017-05-02%20until%3A2017-05-05

You can use the CLI with the advanced query, the same way as a simple query:

• based on a daterange: twitterscraper Trump%20since%3A2017-01-03%20until%3A2017-01-04 -o tweets.json
• based on a daterange and location: twitterscraper Trump%20near%3A"Seattle%2C%20WA"%20within%3A15mi%20since%3A2017-05-02%20until%3A2017-05-05 -o tweets.json
• based on a specific author: twitterscraper Trump%20from%3AAlWest13 -o tweets.json

3. Output

All of the retrieved Tweets are stored in the indicated output file. The contents of the output file will look like:

[{"fullname": "Rupert Meehl", "id": "892397793071050752", "likes": "1", "replies": "0", "retweets": "0", "text": "Latest: Trump now at lowest Approval and highest Disapproval ratings yet. Oh, we're winning bigly here ...\n\nhttps://projects.fivethirtyeight.com/trump-approval-ratings/?ex_cid=rrpromo\u00a0\u2026", "timestamp": "2017-08-01T14:53:08", "user": "Rupert_Meehl"}, {"fullname": "Barry Shapiro", "id": "892397794375327744", "likes": "0", "replies": "0", "retweets": "0", "text": "A former GOP Rep quoted this line, which pretty much sums up Donald Trump. https://twitter.com/davidfrum/status/863017301595107329\u00a0\u2026", "timestamp": "2017-08-01T14:53:08", "user": "barryshap"}, (...)
]

3.1 Opening the output file

In order to correctly handle all possible characters in the tweets (think of chinese or arabic characters), the output is saved as utf-8 encoded bytes. That is why you could see text like ""\u30b1\u30f3\u3055\u307e\u30fe ..." in the output file.

What you should do is open the file with the proper encoding:

TO DO

• Add caching potentially? Would be nice to be able to resume scraping if something goes wrong and have half of the data of a request cached or so.
• Add an example of using a thread pool/asynchio for gathering more tweets in parallel.
• Use RegExp for retrieving the information from the scraped page (instead of Beautifullsoup4). This might solve the problem of the HTML parser not working properly on some linux distributions.

Scrape Twitter for Tweets http://www.ataspinar.com