Natural Language Processing In Python : Part - 4


This is the part - 4 of our series "Natural Language Processing". In previous blog we learn all about text analysis using NLP. In this blog we will learn Language identifier, this is third topic of this series so ready to learn with NLP Language identifier.


Before start it first read last parts, click on below link to read previous parts:



I suggest that you go through last parts before start it which is also more help-full for this NLP Series.


What is NLP ?


It is the branch of data science that consists of systematic processes for analyzing, understanding, and how to driving information from the text data in a smart and efficient manner.


First install libraries which is related to NLP -


nltk, numpy, matplotlib.pyplot, tweepy, TwitterSearch, unidecode, langdetect, langid, gensim


And then import all of these


Install these all libraries which use in this:


import nltk # https://www.nltk.org/install.html

import numpy # https://www.scipy.org/install.html

import matplotlib.pyplot # https://matplotlib.org/downloads.html

import tweepy # https://github.com/tweepy/tweepy

import TwitterSearch # https://github.com/ckoepp/TwitterSearch

import unidecode # https://pypi.python.org/pypi/Unidecode

import langdetect # https://pypi.python.org/pypi/langdetect

import langid # https://github.com/saffsd/langid.py

import gensim


List of Topics which we will covers in this series:

  • Text-analysis using NLTK library

  • N-Grams

  • Detecting text language

  • Language identifier

  • Stemming and Lemmatization using Bigrams

  • Finding unusual words

  • part of speech and meaning

  • Name-Gender identifier

  • Classify document into categories

  • Sentiment Analysis

  • Sentiment Analysis with NLTK

  • Work with Twitter streaming and Cleaning

  • Language detection


Now let's start Topic -Language identifier


What is Language identifier ?


It is the process of identify language form text of data - language may be english, french, german, etc. For this we need good language identification algorithm.


In this we will work with famous NLP language processing package NLTK. In this we will do this using Bi-gram model.


Step 1 :

First need to to tokenize as per past post blog, in this blog we will tokenize it using function. which is another way to tokenize


Step 2:

Now we will find unigram and bigram and finding frequecies as per your selections



Get() function:


Here we find repetition of bigrams and uni-grams by using get() and FreqDist()


Arranging order (Like descending order)



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