无法在python的OpenShift中使用json打开文件

Question

I have a problem with python code in Openshift.

I have a subdomain on my app where I have to open a txt file with json format.

from flask import Flask
from flask import render_template
import json

app = Flask(__name__)

@app.route("/")
def index():
    return render_template("home.html")


@app.route('/casestudy1')
def cs1():
    json_data = open("cs1.txt")
    data = json.load(json_data)
    ....do my staff....
    return render_template("cs1.html")

if I remove the first two lines from cs1() the app works perfect. I tried to run flask localy from command line and it works there as well. The cs1.txt file is in the same root with the main.py.

Error: Internal Server Error

The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

Error on log:

json_data = open("cs1.txt")
IOERROR: [Errno2] No such file or directory: cs1.txt

Application root:

-wsgi
  -static
     -css
     -js
  -templates
     -cs1.html
  -main.py
  -cs1.txt

Answer 1

I found the problem.

import os
json_data = open(os.path.join(os.path.dirname(__file__),"cs1.txt"),'r')

instead of

json_data = open("cs1.txt")