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main.py
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main.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
############################
# fuzzylas
# by Matt, December 2012
# Looks up curve mnemonics
# Using data from spwla.org
############################
# Import libraries
import json
import csv
import os
import time
import webapp2
import jinja2
# from google.appengine.api import search
# from google.appengine.ext import db
import fuzzylas
def datetimeformat(value, format='%H:%M on %d.%m.%Y'):
return value.strftime(format)
############################
# Set up the template stuff
template_dir = os.path.join(os.path.dirname(__file__), 'templates')
jinja_env = jinja2.Environment(loader=jinja2.FileSystemLoader(template_dir),
autoescape=True)
jinja_env.filters['datetimeformat'] = datetimeformat
class Handler(webapp2.RequestHandler):
def write(self, *a, **kw):
self.response.out.write(*a, **kw)
def render_str(self, template, **params):
t = jinja_env.get_template(template)
return t.render(params)
def render(self, template, **kw):
self.write(self.render_str(template, **kw))
############################
# Read the datafile and build a data store
# Use a dictionary since we don't need a dynamic store
# I'm pretty sure it only does this once, on deployment
data_file = os.path.join(os.path.dirname(__file__), 'data', 'curves.csv')
with open(data_file, 'r') as dbfile:
reader = csv.reader(dbfile)
curves = {}
for row in reader:
record = {"company": row[0].decode('latin-1'),
"type": row[1].decode('latin-1'),
"method": row[2].decode('latin-1'),
"mnemonic": row[3].decode('latin-1'), # useful in result lst
"model": row[4].decode('latin-1'),
"units": row[5].decode('latin-1'),
"unittype": row[6].decode('latin-1'),
"description": row[7].decode('latin-1'),
}
curves.setdefault(str(row[3]), []).append(record)
###############
# Uncomment this section to use GAE Search API
# It doesn't handle fuzzy string matching, however
#
# with open(data_file,'r') as dbfile:
# reader = csv.reader(dbfile)
#
# search_documents = []
# putted = 0
#
# for row in reader:
#
# if len(search_documents) == 200:
# # GAE is rate-limited to 15,000 documents per minute
# # So if we've hit the limit, let's wait
# if putted > 1000:
# break
# # putted = 0
# # time.sleep(60)
#
# try:
# index = search.Index(name='curves')
# putted += 200
# index.put(search_documents)
#
# except search.Error:
# logging.exception('Could not put document in index')
#
# search_documents = []
#
# try:
# document = search.Document(
# fields=[
# search.TextField(name='company', value=row[0].decode('latin-1')),
# search.TextField(name='type', value=row[1].decode('latin-1')),
# search.TextField(name='method', value=row[2].decode('latin-1')),
# search.TextField(name='mnemonic', value=row[3].decode('latin-1')),
# search.TextField(name='model', value=row[4].decode('latin-1')),
# search.TextField(name='units', value=row[5].decode('latin-1')),
# search.TextField(name='unittype', value=row[6].decode('latin-1')),
# search.TextField(name='description', value=row[7].decode('latin-1'))
# ])
#
# except UnicodeDecodeError:
# continue
#
# search_documents.append(document)
#
############################
# Handlers
class MainHandler(Handler):
def get(self):
self.render("index.html", mnemonic=None, result=None)
def post(self):
mnemonic = self.request.get('mnemonic').upper()
guess = fuzzylas.guess(curves, mnemonic, 'simple', limit=3, maxdist=1)
if guess is not None:
self.render("index.html", mnemonic=mnemonic, result=guess)
else:
self.reponse.out.write("Oops, something went wrong.")
class AboutHandler(Handler):
def get(self):
self.render("about.html")
class ApiHandler(Handler):
def get(self):
start_time = time.time()
guess = None
if self.request.arguments() == []:
self.render("help.html")
return
mnemonic = self.request.get('mnemonic') or ''
method = self.request.get('method') or 'simple'
# Keep backward compatible for now and look for guesses parameter
limit = self.request.get('guesses') or self.request.get('limit') or 1
maxdist = self.request.get('maxdist') or 1
guess = fuzzylas.guess(curves,
mnemonic.upper(),
method.lower(),
limit=limit,
maxdist=maxdist,
)
response = {
"mnemonic": mnemonic,
"method": method,
"limit": limit,
"maxdist": maxdist,
"time": time.time() - start_time,
"result": guess
}
self.response.headers['Content-Type'] = 'application/vnd.api+json'
self.response.out.write(json.dumps(response))
return
##############################
# This is the app itself
app = webapp2.WSGIApplication([
('/', MainHandler),
('/lookup', ApiHandler),
('/about', AboutHandler)
], debug=True)