I am doing a project "Emotional prediction of user based on tweets", using data mining techniques. For this purpose, I need a data set of tweets of users. Please help.
It's against Twitter's policy to provide datasets of more than user and tweet IDs.
However, as lots of people are tweeting every day, you can construct your own dataset using the twitter api: https://dev.twitter.com/rest/public
There are many guides on how to mine tweets, for example: https://marcobonzanini.com/2015/03/02/mining-twitter-data-with-python-part-1/