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main_words.py
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# coding=utf-8
import re
import unicodedata
from mrjob.job import MRJob
from mrjob.step import MRStep
# Iterates to the whole documents and finds the main words.
class MRMainWords(MRJob):
NUMB_OF_MAIN_WORDS = 100
STOP_WORDS_ES = ["a", "actualmente", "acuerdo", "adelante", "ademas", "además", "adrede", "afirmó", "agregó", "ahi",
"ahora", "ahí", "al", "algo", "alguna", "algunas", "alguno", "algunos", "algún", "alli", "allí",
"alrededor", "ambos", "ampleamos", "antano", "antaño", "ante", "anterior", "antes", "apenas",
"aproximadamente", "aquel", "aquella", "aquellas", "aquello", "aquellos", "aqui", "aquél",
"aquélla", "aquéllas", "aquéllos", "aquí", "arriba", "arribaabajo", "aseguró", "asi", "así",
"atras", "aun", "aunque", "ayer", "añadió", "anadió", "aún", "b", "bajo", "bastante", "bien",
"breve", "buen", "buena", "buenas", "bueno", "buenos", "c", "cada", "casi", "cerca", "cierta",
"ciertas", "cierto", "ciertos", "cinco", "claro", "comentó", "como", "con", "conmigo", "conocer",
"conseguimos", "conseguir", "considera", "consideró", "consigo", "consigue", "consiguen",
"consigues", "contigo", "contra", "cosas", "creo", "cual", "cuales", "cualquier", "cuando",
"cuanta", "cuantas", "cuanto", "cuantos", "cuatro", "cuenta", "cuál", "cuáles", "cuándo", "cuánta",
"cuántas", "cuánto", "cuántos", "cómo", "d", "da", "dado", "dan", "dar", "de", "debajo", "debe",
"deben", "debido", "decir", "dejó", "del", "delante", "demasiado", "demás", "dentro", "deprisa",
"desde", "despacio", "despues", "después", "detras", "detrás", "dia", "dias", "dice", "dicen",
"dicho", "dieron", "diferente", "diferentes", "dijeron", "dijo", "dio", "donde", "dos", "durante",
"día", "días", "dónde", "e", "ejemplo", "el", "ella", "ellas", "ello", "ellos", "embargo",
"empleais", "emplean", "emplear", "empleas", "empleo", "en", "encima", "encuentra", "enfrente",
"enseguida", "entonces", "entre", "era", "eramos", "eran", "eras", "eres", "es", "esa", "esas",
"ese", "eso", "esos", "esta", "estaba", "estaban", "estado", "estados", "estais", "estamos",
"estan", "estar", "estará", "estas", "este", "esto", "estos", "estoy", "estuvo", "está", "están",
"ex", "excepto", "existe", "existen", "explicó", "expresó", "f", "fin", "final", "fue", "fuera",
"fueron", "fui", "fuimos", "g", "general", "gran", "grandes", "gueno", "h", "ha", "haber", "habia",
"habla", "hablan", "habrá", "había", "habían", "hace", "haceis", "hacemos", "hacen", "hacer",
"hacerlo", "haces", "hacia", "haciendo", "hago", "han", "hasta", "hay", "haya", "he", "hecho",
"hemos", "hicieron", "hizo", "horas", "hoy", "hubo", "i", "igual", "incluso", "indicó", "informo",
"informó", "intenta", "intentais", "intentamos", "intentan", "intentar", "intentas", "intento",
"ir", "j", "junto", "k", "l", "la", "lado", "largo", "las", "le", "lejos", "les", "llegó", "lleva",
"llevar", "lo", "los", "luego", "lugar", "m", "mal", "manera", "manifestó", "mas", "mayor", "me",
"mediante", "medio", "mejor", "mencionó", "menos", "menudo", "mi", "mia", "mias", "mientras",
"mio", "mios", "mis", "misma", "mismas", "mismo", "mismos", "modo", "momento", "mucha", "muchas",
"mucho", "muchos", "muy", "más", "mí", "mía", "mías", "mío", "míos", "n", "nada", "nadie", "ni",
"ninguna", "ningunas", "ninguno", "ningunos", "ningún", "no", "nos", "nosotras", "nosotros",
"nuestra", "nuestras", "nuestro", "nuestros", "nueva", "nuevas", "nuevo", "nuevos", "nunca", "o",
"ocho", "os", "otra", "otras", "otro", "otros", "p", "pais", "para", "parece", "parte", "partir",
"pasada", "pasado", "paìs", "peor", "pero", "pesar", "poca", "pocas", "poco", "pocos", "podeis",
"podemos", "poder", "podria", "podriais", "podriamos", "podrian", "podrias", "podrá", "podrán",
"podría", "podrían", "poner", "por", "porque", "posible", "primer", "primera", "primero",
"primeros", "principalmente", "pronto", "propia", "propias", "propio", "propios", "proximo",
"próximo", "próximos", "pudo", "pueda", "puede", "pueden", "puedo", "pues", "q", "qeu", "que",
"quedó", "queremos", "quien", "quienes", "quiere", "quiza", "quizas", "quizá", "quizás", "quién",
"quiénes", "qué", "r", "raras", "realizado", "realizar", "realizó", "repente", "respecto", "s",
"sabe", "sabeis", "sabemos", "saben", "saber", "sabes", "salvo", "se", "sea", "sean", "segun",
"segunda", "segundo", "según", "seis", "ser", "sera", "será", "serán", "sería", "señaló", "senaló",
"si", "sido", "siempre", "siendo", "siete", "sigue", "siguiente", "sin", "sino", "sobre", "sois",
"sola", "solamente", "solas", "solo", "solos", "somos", "son", "soy", "soyos", "su", "supuesto",
"sus", "suya", "suyas", "suyo", "sé", "sí", "sólo", "t", "tal", "tambien", "también", "tampoco",
"tan", "tanto", "tarde", "te", "temprano", "tendrá", "tendrán", "teneis", "tenemos", "tener",
"tenga", "tengo", "tenido", "tenía", "tercera", "ti", "tiempo", "tiene", "tienen", "toda", "todas",
"todavia", "todavía", "todo", "todos", "total", "trabaja", "trabajais", "trabajamos", "trabajan",
"trabajar", "trabajas", "trabajo", "tras", "trata", "través", "tres", "tu", "tus", "tuvo", "tuya",
"tuyas", "tuyo", "tuyos", "tú", "u", "ultimo", "un", "una", "unas", "uno", "unos", "usa", "usais",
"usamos", "usan", "usar", "usas", "uso", "usted", "ustedes", "v", "va", "vais", "valor", "vamos",
"van", "varias", "varios", "vaya", "veces", "ver", "verdad", "verdadera", "verdadero", "vez",
"vosotras", "vosotros", "voy", "vuestra", "vuestras", "vuestro", "vuestros", "w", "x", "y", "ya",
"yo", "z", "él", "ésa", "ésas", "ése", "ésos", "ésta", "éstas", "éste", "éstos", "última",
"últimas", "último", "últimos"]
STOP_WORDS_EN = ["a", "a's", "able", "about", "above", "according", "accordingly", "across", "actually", "after",
"afterwards", "again", "against", "ain't", "all", "allow", "allows", "almost", "alone", "along",
"already", "also", "although", "always", "am", "among", "amongst", "an", "and", "another", "any",
"anybody", "anyhow", "anyone", "anything", "anyway", "anyways", "anywhere", "apart", "appear",
"appreciate", "appropriate", "are", "aren't", "around", "as", "aside", "ask", "asking",
"associated", "at", "available", "away", "awfully", "b", "be", "became", "because", "become",
"becomes", "becoming", "been", "before", "beforehand", "behind", "being", "believe", "below",
"beside", "besides", "best", "better", "between", "beyond", "both", "brief", "but", "by", "c",
"c'mon", "c's", "came", "can", "can't", "cannot", "cant", "cause", "causes", "certain",
"certainly", "changes", "clearly", "co", "com", "come", "comes", "concerning", "consequently",
"consider", "considering", "contain", "containing", "contains", "corresponding", "could",
"couldn't", "course", "currently", "d", "definitely", "described", "despite", "did", "didn't",
"different", "do", "does", "doesn't", "doing", "don't", "done", "down", "downwards", "during", "e",
"each", "edu", "eg", "eight", "either", "else", "elsewhere", "enough", "entirely", "especially",
"et", "etc", "even", "ever", "every", "everybody", "everyone", "everything", "everywhere", "ex",
"exactly", "example", "except", "f", "far", "few", "fifth", "first", "five", "followed",
"following", "follows", "for", "former", "formerly", "forth", "four", "from", "further",
"furthermore", "g", "get", "gets", "getting", "given", "gives", "go", "goes", "going", "gone",
"got", "gotten", "greetings", "h", "had", "hadn't", "happens", "hardly", "has", "hasn't", "have",
"haven't", "having", "he", "he's", "hello", "help", "hence", "her", "here", "here's", "hereafter",
"hereby", "herein", "hereupon", "hers", "herself", "hi", "him", "himself", "his", "hither",
"hopefully", "how", "howbeit", "however", "i", "i'd", "i'll", "i'm", "i've", "ie", "if", "ignored",
"immediate", "in", "inasmuch", "inc", "indeed", "indicate", "indicated", "indicates", "inner",
"insofar", "instead", "into", "inward", "is", "isn't", "it", "it'd", "it'll", "it's", "its",
"itself", "j", "just", "k", "keep", "keeps", "kept", "know", "known", "knows", "l", "last",
"lately", "later", "latter", "latterly", "least", "less", "lest", "let", "let's", "like", "liked",
"likely", "little", "look", "looking", "looks", "ltd", "m", "mainly", "many", "may", "maybe", "me",
"mean", "meanwhile", "merely", "might", "more", "moreover", "most", "mostly", "much", "must", "my",
"myself", "n", "name", "namely", "nd", "near", "nearly", "necessary", "need", "needs", "neither",
"never", "nevertheless", "new", "next", "nine", "no", "nobody", "non", "none", "noone", "nor",
"normally", "not", "nothing", "novel", "now", "nowhere", "o", "obviously", "of", "off", "often",
"oh", "ok", "okay", "old", "on", "once", "one", "ones", "only", "onto", "or", "other", "others",
"otherwise", "ought", "our", "ours", "ourselves", "out", "outside", "over", "overall", "own", "p",
"particular", "particularly", "per", "perhaps", "placed", "please", "plus", "possible",
"presumably", "probably", "provides", "q", "que", "quite", "qv", "r", "rather", "rd", "re",
"really", "reasonably", "regarding", "regardless", "regards", "relatively", "respectively",
"right", "s", "said", "same", "saw", "say", "saying", "says", "second", "secondly", "see",
"seeing", "seem", "seemed", "seeming", "seems", "seen", "self", "selves", "sensible", "sent",
"serious", "seriously", "seven", "several", "shall", "she", "should", "shouldn't", "since", "six",
"so", "some", "somebody", "somehow", "someone", "something", "sometime", "sometimes", "somewhat",
"somewhere", "soon", "sorry", "specified", "specify", "specifying", "still", "sub", "such", "sup",
"sure", "t", "t's", "take", "taken", "tell", "tends", "th", "than", "thank", "thanks", "thanx",
"that", "that's", "thats", "the", "their", "theirs", "them", "themselves", "then", "thence",
"there", "there's", "thereafter", "thereby", "therefore", "therein", "theres", "thereupon",
"these", "they", "they'd", "they'll", "they're", "they've", "think", "third", "this", "thorough",
"thoroughly", "those", "though", "three", "through", "throughout", "thru", "thus", "to",
"together", "too", "took", "toward", "towards", "tried", "tries", "truly", "try", "trying",
"twice", "two", "u", "un", "under", "unfortunately", "unless", "unlikely", "until", "unto", "up",
"upon", "us", "use", "used", "useful", "uses", "using", "usually", "uucp", "v", "value", "various",
"very", "via", "viz", "vs", "w", "want", "wants", "was", "wasn't", "way", "we", "we'd", "we'll",
"we're", "we've", "welcome", "well", "went", "were", "weren't", "what", "what's", "whatever",
"when", "whence", "whenever", "where", "where's", "whereafter", "whereas", "whereby", "wherein",
"whereupon", "wherever", "whether", "which", "while", "whither", "who", "who's", "whoever",
"whole", "whom", "whose", "why", "will", "willing", "wish", "with", "within", "without", "won't",
"wonder", "would", "wouldn't", "x", "y", "yes", "yet", "you", "you'd", "you'll", "you're",
"you've", "your", "yours", "yourself", "yourselves", "z", "zero"]
SPECIAL_CHARACTERS_RE = re.compile("[^A-Za-z]+")
def steps(self):
return [
MRStep(mapper=self.mapper_get_occurrence_for_word,
reducer=self.reducer_sum_occurrences_for_word),
MRStep(reducer=self.reducer_sort_words_by_occurrences)
]
# Yields [word, occurrence] for each word in the line.
def mapper_get_occurrence_for_word(self, _, line):
# In order to yield a pair, the word has to pass the validation filter.
for word in line.split():
try:
# Converts the word into unicode in order to make next transformations.
norm_word = unicode(word, "iso-8859-1")
norm_word = norm_word.lower()
# Verifies that the word until then is not a stop word.
if norm_word not in self.STOP_WORDS_ES and norm_word not in self.STOP_WORDS_EN:
# Normalizes the unicode word to the 'Normal Form Composed' i.e. replaces accent letters with non
# accented ones.
norm_word = unicodedata.normalize('NFD', norm_word).encode('ascii', 'ignore')
# Removes every special character from the normalized word.
norm_word = re.sub(self.SPECIAL_CHARACTERS_RE, '', norm_word)
# Makes possible remaining uppercase letters lowercase ones.
norm_word = norm_word.lower()
# Verifies that the resulting normalized word is not an empty string.
if norm_word != "" and norm_word not in self.STOP_WORDS_ES and norm_word not in self.STOP_WORDS_EN:
# Yields the word after the filtering.
yield norm_word, 1
except:
# There was a problem filtering the word and it is discarded thus.
None
# Yields [None, (word, cumulative_occurrences)] for each (word, occurrences) key received.
def reducer_sum_occurrences_for_word(self, norm_word, occurrences):
yield None, (norm_word, sum(occurrences))
'''
Prints [main word list] after sorting the word list in descendant order using the cumulative occurrences of the
word as criterion.
'''
def reducer_sort_words_by_occurrences(self, _, norm_word_and_cumulative_occurrences):
# Converts the norm_word_and_cumulative_occurrences (Generator) into a list of tuples.
norm_word_and_cumulative_occurrences_list = []
for norm_word, cumulative_occurrences in norm_word_and_cumulative_occurrences:
norm_word_and_cumulative_occurrences_list.append((norm_word, cumulative_occurrences))
# Sorts the tuple list in descendant order using the cumulative occurrences as criterion.
norm_word_and_cumulative_occurrences_list.sort(key=lambda x: x[1], reverse=True)
# Creates a list containing only the words after the descendant sorting. The maximum length of the list will be
# indicated by NUMB_OF_MAIN_WORDS.
iterations = min(self.NUMB_OF_MAIN_WORDS, len(norm_word_and_cumulative_occurrences_list))
row = "["
for i in range(0, iterations):
row += "\"" + norm_word_and_cumulative_occurrences_list[i][0] + "\", "
# Deletes the last two characters and appends the list end symbol.
row = row[:-2]
row += "]"
print row
if __name__ == '__main__':
MRMainWords.run()