I am trying to run python with html using flask locally, i try to render a template within a class object, it compiles but when i try to access it on http://localhost:5000 it gives me 404. Could anyone tell what I'm doing wrong here?
I am trying to display values from a json format using chart.js library.
from flask import Flask
from flask import render_template
import os.path
import json
app = Flask(__name__)
#import the json file
_player_json_file = os.path.join(os.path.dirname(__file__), 'players.json')
def read_players(player_file=None):
if player_file is None:
player_file = _player_json_file
try:
data = json.loads(open(player_file).read())
except IOError:
return {}
#make player dictionary
players = {}
#get player ID from json file = data.
for playerID in data:
players[playerID] = Player_data(data[playerID])
return players
class Players_Data (object):
#app.route("/")
def __init__(self, data):
"""
Assign all the values from the json file to new variables
the values are birth date age weight...
"""
self.player_ID = data['gsis_id']
self.gsis_name = data.get('gsis_name', '')
self.player_fullname = data.get('full_name', '')
self.player_first_name = data.get('first_name', '')
self.player_last_name = data.get('last_name', '')
self.player_weight = data.get('weight','')
self.player_height = data.get('height' , '')
self.player_birth = data.get('birthdate', '')
self.player_pro_years = data.get('years_pro', '')
self.player_team = data.get('data', '')
values = [player_ID,gsis_name,player_fullname,player_first_name,player_last_name,player_weight]
return render_template('chart.html', data=data, values=values)
if __name__ == "__main__":
app.run(host='localhost')
I don't think template rendering is the issue here. You can just return a string from your view as an example.
You get a 404 because that's not how you do classy views in flask. You can have a look here: http://flask.pocoo.org/docs/0.12/views/
But essentially you have to extend from flask.views.View and then manually attach your route to app instance, so it looks something like this:
from flask import Flask
from flask.views import View
app = Flask(__name__)
class Players_Data(View):
def dispatch_request(self):
return 'LOL'
app.add_url_rule('/', view_func=Players_Data.as_view('show_users'))
if __name__ == "__main__":
app.run(host='localhost')
Related
from flask import Flask, request, jsonify
import joblib
app = Flask(__name__)
#app.route('/predict', methods=['POST','GET'])
def predict():
model = joblib.load('rf_grid.pkl')
data = request.get_json()
prediction = model.predict([[np.array(data['Age'],data['SipSp'],data['Parch'],
data['Fare'],data['Sex_male'],
data['Cabin_Rare'],data['Embarked_S'])]])
output = prediction[0]
return jsonify(output)
if __name__ == '__main__':
app.run(debug=True)
This is a flask file that I'm running under app.py
import requests
import json
url ='http://127.0.0.1:5000/predict'
dictionary = {'Age':50, 'SipSp':1, 'Parch':1,'Fare':150,'Sex_male':1,'Cabin_Rare':0,'Embarked_S':1}
r = requests.post(url, json = dictionary)
print(r.json())
This is the file I'm running under requests.py. When I run this file I get the error:json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
How do I get rid of this error and for my requests.py to run?
There is an error in your API logic. I have commented core logic portion and returned JSON response. And It it's not giving any error.
import numpy as np
from flask import Flask, request, jsonify
import joblib
app = Flask(__name__)
#app.route('/predict', methods=['POST','GET'])
def predict():
# model = joblib.load('rf_grid.pkl')
# data = request.get_json()
# prediction = model.predict([[np.array(data['Age'],data['SipSp'],data['Parch'],
# data['Fare'],data['Sex_male'],
# data['Cabin_Rare'],data['Embarked_S'])]])
# output = prediction[0]
output = {"ok": True}
return jsonify(output)
if __name__ == '__main__':
app.run(debug=True)
If you can please share rf_grid.pkl file So, I can help with that.
I am running a python flask app on Docker. The app consists of a frontend in which a user provides a search term and the app returns an HTML file with insights and images. The problem is that after the first time I try the app, the HTML file keeps returning the images of the first try.
If I erase cookies, the problem is solved. But I cannot ask a user to erase cookies every time she needs to use the app.
I tried using os.remove before saving every image, but this doesn't work.
from googleapiclient.discovery import build
import pandas as pd
import matplotlib.pyplot as plt
from flask_restful import Api
from flask import Flask,render_template,request
import math
application = Flask(__name__)
api = Api(application)
#application.route('/')
def home():
return render_template('home.html')
#application .route('/predict',methods=['POST'])
def predict():
term1 = request.form['term1']
my_results_list = []
def google_query(query, api_key, cse_id, **kwargs):
query_service = build("customsearch", "v1", developerKey=api_key)
query_results = query_service.cse().list(q=query, cx=cse_id, **kwargs).execute()
return query_results['items']
my_results = google_query(term1,'api_key','cse_id', num = 10)
for result in my_results:
my_results_list.append(result['link'])
data = pd.DataFrame(my_results_list)
values = [1] * len(data)
N = len(values)
values += values[:1]
angles = [n/float(N)*2*math.pi for n in range(N)]
angles += angles[:1]
plt.polar(angles,values, marker='.', color = 'red')
temp = 'graph'
temp = 'static/' + temp + '.png'
plt.savefig(temp)
html = []
html.append("""<!DOCTYPE html><html>""")
html.append("""<img src="{{url_for('static',filename='graph.png')}}"/>""")
html = ' '.join(html)
temp = 'templates/result_vf.html'
print(html, file = open(temp,'w',encoding='utf-8'))
return render_template('result_vf.html')
if __name__ == '__main__':
application.run(host=('0.0.0.0'), port=8080 ,debug=True)
I have a little flask application, it is mostly written with methods (just one class).
Can someone explain me - example would be great - why I am receiving 1 missing argument after adding self to method declaration?
Here is a code:
from __future__ import print_function
from flask import Flask, render_template, make_response
from flask import redirect, request, jsonify, url_for
from multiprocessing import Value
from flask_classful import FlaskView
#from settings import *
from utils.settings import *
import logging
import linecache
import os
import simplejson as json
import mysql.connector
counter = Value('i', 0)
app = Flask(__name__)
class FlaskCLS(FlaskView):
app.debug = False
app._static_folder = os.path.abspath("templates/static/")
#app.route('/v1/api/cords', methods=['GET', 'POST', 'OPTIONS'])
def snd_post():
res = make_response({'x': '55.333', 'y': '18.666'})
return res
#app.route('/', methods=['GET', 'POST', 'OPTIONS'])
def index():
result = []
data = request.data
with counter.get_lock():
counter.value += 1
out = counter.value
with open(str(out), 'a') as dumping:
json.dump(data, dumping)
# ----------------------parser-section------------
with open(str(out), 'r+') as file:
content = file.readlines()
for line in content:
result.append(line.replace('\\', "").replace('"', "").
replace('{', "").replace('}', '').
replace(']', '').replace(',','\n').
replace('[',''))
f = open(str(out), 'w')
f.write('')
f.close()
with open(str(out), 'a') as appending:
appending.write('')
for line in result:
appending.write(line)
# --------------------cords-grabbing-------------
x = linecache.getline(str(out), 1)
y = linecache.getline(str(out), 2)
fx = open('x', 'w')
fy = open('y', 'w')
fx.write(x)
fx.close()
fy.write(y)
fy.close()
mydb = mysql.connector.connect(
host=db_host,
user='root',
auth_plugin='mysql_native_password',
password=password,
buffered=buffered,
database=database)
mycursor = mydb.cursor()
mycursor.execute('select nazwa, x, y, SQRT(POW(69.1 * (x - 54.111), 2) + POW(69.1 *(18.222 - y)\
* COS(x / 57.3), 2)) as distance from wet_dane having distance <125 order by distance;')
mycursor.fetchall()
mydb.commit()
# ---------------------empty-files----------------
str_directory = '/var/www/html/'
list_files = [x for x in os.listdir(str_directory) if x[0] != '.']
for each_file in list_files:
file_path = '%s/%s' % (str_directory, each_file)
if os.path.getsize(file_path) == 0:
os.remove(file_path)
else:
pass
return render_template('layouts/index.html')
flask = FlaskCLS()
# ---------------------runner-section-------------
if __name__ == '__main__':
log = logging.getLogger('werkzeug')
log.disabled = True
app.run(host, port, debug, ssl_context=context)
My point is - how properly add self to index and snd_post methods?
I want to pass - for example - x variable from index to snd_post in the same class.
Without self flask doesn't allow me to do such an operation.
Thanks.
I don't have experience with Flask-Classful, but it looks that you are supposed to register the routes to the app this way:
class QuotesView(FlaskView):
def index(self):
return "Hello"
QuotesView.register(app)
Instead of the #app.route(...) decorator.
Ok, i've made a solution for this, now my main python file looks like this:
from __future__ import print_function
from flask import Flask, render_template, make_response
from multiprocessing import Value
from utils.settings import *
from py_methods.post import Post
from py_methods.db_connect import Db_conn
from py_methods.empty_files_del import DeleteEmpty
from py_methods.files_operations import Files
import logging
import os
app = Flask(__name__)
app.debug = False
app._static_folder = os.path.abspath("templates/static/")
#app.route('/v1/api/cords', methods=['GET', 'POST', 'OPTIONS'])
def snd_post():
return Post.snd_post()
class Main():
#app.route('/', methods=['GET', 'POST', 'OPTIONS'])
def index():
Files.parsing()
DeleteEmpty.del_empty()
Db_conn.wet_db()
return render_template('layouts/index.html')
# ---------------------runner-section-------------
if __name__ == '__main__':
log = logging.getLogger('werkzeug')
log.disabled = True
app.run(host, port, debug, ssl_context=context)
So it's just a runner - every method I wrote has own file and own class. This allow me to inheritance the variables. We can close this topic. Thansk for the answers.
This question already has an answer here:
Flask view raises TypeError: 'bool' object is not callable
(1 answer)
Closed 4 years ago.
I was executing the following Flask code and then I get the following error.
TypeError: The view function did not return a valid response. The function either
returned None or ended without a return statement.
I'm not quite sure what it means and what's wrong in my code.
Code:
from flask import Flask, render_template
import urllib.request
import json
import time
app = Flask(__name__ ,template_folder='template')
namep = "PewDiePie"
namet = "TSeries"
key = "MY_API_KEY"
#app.route("/")
def function_main():
datat = urllib.request.urlopen("https://www.googleapis.com/youtube/v3/channels?part=statistics&forUsername="+namep+"&key="+key).read()
datap = urllib.request.urlopen("https://www.googleapis.com/youtube/v3/channels?part=statistics&forUsername="+namet+"&key="+key).read()
subt = json.loads(datat)["items"][0]["statistics"]["subscriberCount"]
subsp = json.loads(datap)["items"][0]["statistics"]["subscriberCount"]
def main():
return render_template('template\index.html', subsp = subsp, subt = subt)#Sends the integers to index.html to get printed in the Flask server
if __name__ == "__main__":
app.run(debug=True, host="0.0.0.0", port=80)
Any help would be appreciated. Thanks!
from flask import Flask, render_template
import urllib.request
import json
import time
app = Flask(__name__ ,template_folder='template')
namep = "PewDiePie"
namet = "TSeries"
key = "MY_API_KEY"
#app.route("/")
def function_main():
datat = urllib.request.urlopen("https://www.googleapis.com/youtube/v3/channels?part=statistics&forUsername="+namep+"&key="+key).read()
datap = urllib.request.urlopen("https://www.googleapis.com/youtube/v3/channels?part=statistics&forUsername="+namet+"&key="+key).read()
subt = json.loads(datat)["items"][0]["statistics"]["subscriberCount"]
subsp = json.loads(datap)["items"][0]["statistics"]["subscriberCount"]
return render_template('template\index.html', subsp = subsp, subt = subt)#Sends the integers to index.html to get printed in the Flask server
if __name__ == "__main__":
app.run(debug=True, host="0.0.0.0", port=80)
I made a script python app.py and I managed to store data from a javascript form, thanks to a flask app :
app = Flask(__name__)
app.config.from_object('config')
db.init_app(app)
#app.route('/getFormData', methods=['POST'])
def get_javascript_data():
params = request.form.to_dict()
sunElevation = params['sunElevation']
cloudCoverage = params['cloudCoverage']
thresholdNDVI = params['thresholdNDVI']
limitScene = params['limitScene']
city = params['city']
data_search = passData(sunElevation, cloudCoverage, thresholdNDVI, limitScene, city)
return jsonify(data_search.data_dict)
if __name__ == '__main__':
app.run()
Here is the definition of the class passData, in models.py :
class passData:
def __init__(self, sunElevation, cloudCoverage, thresholdNDVI, limitScene, city):
self.sunElevation = sunElevation
self.cloudCoverage = cloudCoverage
self.thresholdNDVI = thresholdNDVI
self.limitScene = limitScene
self.city = city
self.data_dict = [{'sunElevation':self.sunElevation,'cloudCoverage':self.cloudCoverage, 'thresholdNDVI':self.thresholdNDVI, 'limit':self.limitScene, 'city':self.city}]
I need to use those different parameters (sunElevation...) in an other script, in a other folder, to execute a search of imagery and then run the script associated. My problem is that I don't know how to pass those data, because they seem to only exist in the fonction defined in the get_javascript_data().
If someone has an idea that could help me !
You just have to import the other script, call the function and pass the parameters:
app = Flask(__name__)
app.config.from_object('config')
db.init_app(app)
from path.to.your.file import your_function
#app.route('/getFormData', methods=['POST'])
def get_javascript_data():
params = request.form.to_dict()
sunElevation = params['sunElevation']
cloudCoverage = params['cloudCoverage']
thresholdNDVI = params['thresholdNDVI']
limitScene = params['limitScene']
city = params['city']
data_search = passData(sunElevation, cloudCoverage, thresholdNDVI, limitScene, city)
# call the function and pass the parameters
your_function(sunElevation, cloudCoverage) #...
return jsonify(data_search.data_dict)
Try adding the following code in your file, then import the script
import os, sys
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..')))
from eosLandviewer.main_naturalite import search