Lyricize：Markovチェーンを使用して歌詞を作成するFlaskアプリ

def generateModel(text, order):
    model = {}
    for i in range(0, len(text) - order):
        fragment = text[i:i+order]
        next_letter = text[i+order]
        if fragment not in model:
            model[fragment] = {}
        if next_letter not in model[fragment]:
            model[fragment][next_letter] = 1
        else:
            model[fragment][next_letter] += 1
    return model

>>> generateModel("bobby", 1)
{'b': {'y': 1, 'b': 1, 'o': 1}, 'o': {'b': 1}}

from random import choice
def getNextCharacter(model, fragment):
    letters = []
    for letter in model[fragment].keys():
        for times in range(0, model[fragment][letter]):
            letters.append(letter)
    return choice(letters)

def generateText(text, order, length):
    model = generateModel(text, order)

    currentFragment = text[0:order]
    output = ""
    for i in range(0, length-order):
        newCharacter = getNextCharacter(model, currentFragment)
        output += newCharacter
        currentFragment = currentFragment[1:] + newCharacter
    print output

from random import choice
import sys

def generateModel(text, order):
    model = {}
    for i in range(0, len(text) - order):
        fragment = text[i:i+order]
        next_letter = text[i+order]
        if fragment not in model:
            model[fragment] = {}
        if next_letter not in model[fragment]:
            model[fragment][next_letter] = 1
        else:
            model[fragment][next_letter] += 1
    return model

def getNextCharacter(model, fragment):
    letters = []
    for letter in model[fragment].keys():
        for times in range(0, model[fragment][letter]):
            letters.append(letter)
    return choice(letters)

def generateText(text, order, length):
    model = generateModel(text, order)
    currentFragment = text[0:order]
    output = ""
    for i in range(0, length-order):
        newCharacter = getNextCharacter(model, currentFragment)
        output += newCharacter
        currentFragment = currentFragment[1:] + newCharacter
    print output

text = "some sample text"
if __name__ == "__main__":
    generateText(text, int(sys.argv[1]), int(sys.argv[2]))

$ python markov.py 2 100
I wounts
You ho's humortel whime
 mateend I wass
How by Lover

$ python markov.py 4 100
stress you to cosmic tears
All they've cracked you (honestly) at the filler in to like raise
$ python markov.py 6 100
tress you place the wheel from me
Please be philosophical
Please be tapped into my house

[
  {
     "title":"Don't Panic",
     "url":"http://www.lyricsnmusic.com/coldplay/don-t-panic-lyrics/4294612",
     "snippet":"Bones sinking like stones \r\nAll that we've fought for \r\nHomes, places we've grown \r\nAll of us are done for \r\n\r\nWe live in a beautiful world \r\nYeah we ...",
     "context":null,
     "viewable":true,
     "instrumental":false,
     "artist":{
        "name":"Coldplay",
        "url":"http://www.lyricsnmusic.com/coldplay"
     }
  },
  {
     "title":"Shiver",
     "url":"http://www.lyricsnmusic.com/coldplay/shiver-lyrics/4294613",
     "snippet":"So I look in your direction\r\nBut you pay me no attention, do you\r\nI know you don't listen to me\r\n'Cause you say you see straight through me, don't you...",
     "context":null,
     "viewable":true,
     "instrumental":false,
     "artist":{
        "name":"Coldplay",
        "url":"http://www.lyricsnmusic.com/coldplay"
     }
  },
  ...
]

$ mkdir lyricize
$ cd lyricize
$ virtualenv --no-site-packages venv
$ source venv/bin/activate

$ pip install PyMarkovChain flask requests
$ pip freeze > requirements.txt

from flask import Flask, render_template

app = Flask(__name__)
app.debug = True

@app.route('/', methods=['GET'])
def index():
    return render_template('index.html')

if __name__ == '__main__':
    app.run()

 
  

    Artist or band name: 

    Number of lines:
    
      {% for n in range(1,11) %}
        {{n}}
      {% endfor %}
    
    


    
  
 

$ python app.py
* Running on http://127.0.0.1:5000/

 
  

   

   {% for line in result %}
     {{ line }}

   {% endfor %}
   
   
{{ artist }}
   

   

    
   
  
 

@app.route('/lyrics', methods=['POST'])
def lyrics():
    artist = request.form['artist']
    lines = int(request.form['lines'])

    if not artist:
        return redirect(url_for('index'))

    return render_template('lyrics.html', result=['hello', 'world'], artist=artist)

from flask import Flask, render_template, url_for, redirect

$ python app.py

# Get a response of sample lyrics from the provided artist
uri = "http://api.lyricsnmusic.com/songs"
params = {
    'api_key': API_KEY,
    'artist': artist,
}
response = requests.get(uri, params=params)
lyric_list = response.json()

$ echo "API_KEY=[youractualapikeygoeshere]" > .env

import os
API_KEY = os.environ.get('API_KEY')

from pymarkovchain import MarkovChain

mc = MarkovChain()
mc.generateDatabase(lyrics)

result = []
for line in range(0, lines):
    result.append(mc.generateString())

from flask import Flask, url_for, redirect, request, render_template
import requests
from pymarkovchain import MarkovChain
import os

API_KEY = os.environ.get('API_KEY')

app = Flask(__name__)
app.debug = True

@app.route('/', methods=['GET'])
def index():
    return render_template('index.html')

@app.route('/lyrics', methods=['POST'])
def lyrics():
    artist = request.form['artist']
    lines = int(request.form['lines'])

    if not artist:
        return redirect(url_for('index'))

    # Get a response of sample lyrics from the artist
    uri = "http://api.lyricsnmusic.com/songs"
    params = {
        'api_key': API_KEY,
        'artist': artist,
    }
    response = requests.get(uri, params=params)
    lyric_list = response.json()

    # Parse results into a long string of lyrics
    lyrics = ''
    for lyric_dict in lyric_list:
        lyrics += lyric_dict['snippet'].replace('...', '') + ' '

    # Generate a Markov model
    mc = MarkovChain()
    mc.generateDatabase(lyrics)

    # Add lines of lyrics
    result = []
    for line in range(0, lines):
        result.append(mc.generateString())

    return render_template('lyrics.html', result=result, artist=artist)

if __name__ == '__main__':
    app.run()

$ echo "web: python app.py" > Procfile

PORT = int(os.environ.get('PORT', 5000))

app = Flask(__name__)
app.config.from_object(__name__)

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=PORT)

$ git init
$ git add .
$ git commit -m "First commit"
$ heroku create
$ git push heroku master

$ heroku config:set API_KEY=[youractualapikeygoeshere]