[PYTHON] The record I was addicted to when putting MeCab on Heroku

Purpose

I put pandas, plotly, and MeCab in flask, launched a simple web application on Heroku, and tried to enable simple morphological analysis and aggregation from anywhere.

I was addicted to deploying Heroku, so don't forget to record it.

environment

Windows10 Python3.7 Anaconda

What i did

Flask preparation omitted. No problem locally.

main.py test code (xlsx input, plotly output, html output part is deleted.)

# -*- coding: utf-8 -*-
import os
import csv
from flask import *
from werkzeug.utils import secure_filename
import pandas as pd
import plotly
import pathlib
import MeCab

app = Flask(__name__)

@app.route("/")
def init():
    cmd = "pip freeze"
    out = os.popen(cmd).read()
    return out

@app.route("/0")
def mecab():
    sentence = """Amazon Elastic Compute Cloud for AWS's Famous Services(EC2)And Amazon Simple Storage Service(S3)There is.
Compared to the physical server farms owned by clients so far, AWS has the advantage of being able to quickly provide large-scale computing power."""
    t = MeCab.Tagger('')
    out = t.parse(sentence)
    return out

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

requirements.txt

gunicorn==19.9.0
click==7.1.1
Flask==1.1.2
itsdangerous==1.1.0
Jinja2==2.11.2
MarkupSafe==1.1.1
numpy==1.18.3
pandas==1.0.3
plotly==4.6.0
python-dateutil==2.8.1
pytz==2019.3
retrying==1.3.3
six==1.14.0
Werkzeug==1.0.1
xlrd==1.2.0
mecab-python3

Procfile

web: gunicorn main:app

.buildpacks

https://github.com/sunny4381/heroku-buildpack-linuxbrew.git

.cellar

mecab
mecab-ipadic

$ git init
$ heroku create flask-mecab-heroku
$ heroku create --buildpack https://github.com/heroku/heroku-buildpack-multi
$ heroku config:add LD_LIBRARY_PATH=/app/.linuxbrew/lib
$ heroku config:set MECAB_PATH=/app/.linuxbrew/lib/libmecab.so
$ git add .
$ git commit -m "first"
$ git push heroku master

reference python + django + scikit-learn + mecab (1) on heroku https://qiita.com/kenchin110100/items/6f1c84ac8858525fffc5

problem

I can install mecab with Linuxbrew, but pip doesn't work. I can install packages with pip, but Linuxbrew doesn't work.

Solution

$ heroku create --buildpack https://github.com/heroku/heroku-buildpack-multi Doesn't work. I had to set multiple buildpacks.

$ git init
$ heroku create flask-mecab-heroku2
$ heroku buildpacks:set https://github.com/heroku/heroku-buildpack-multi.git
$ heroku buildpacks:add --index 2 heroku/python
$ heroku config:add LD_LIBRARY_PATH=/app/.linuxbrew/lib
$ heroku config:set MECAB_PATH=/app/.linuxbrew/lib/libmecab.so
$ git add .
$ git commit -m "first"
$ git push heroku master

output https://flask-mecab-heroku2.herokuapp.com/ https://flask-mecab-heroku2.herokuapp.com/0

Good grief. Now you can create an analysis page.

Looking back, it's a simple thing, but when you don't understand, you don't understand. Also, it seems that this is not the optimal solution ...

It would be nice to be able to create a web app around here, but heroku has only about 500MB of memory. https://qiita.com/kzuzuo/items/d41327433c9cdc6a5fd3 https://qiita.com/kzuzuo/items/8a80d8974bf3a7db7e54