title: Python KeyError: 'OUTPUT_PATH'
body: <p>I'm trying to run the following python code for to exercise </p>
  
  <pre><code>#!/bin/python3
  
  import os
  import sys
  
  #
  # Complete the maximumDraws function below.
  #
  def maximumDraws(n):
      return n+1
  
  if __name__ == '__main__':
      fptr = open(os.environ['OUTPUT_PATH'], 'w')
  
      t = int(input())
  
      for t_itr in range(t):
          n = int(input())
  
          result = maximumDraws(n)
  
          fptr.write(str(result) + '\n')
  
      fptr.close()
  </code></pre>
  
  <p>but i get this error message</p>
  
  <pre><code>Traceback (most recent call last):
    File "maximumdraws.py", line 13, in &lt;module&gt;
      fptr = open(os.environ['OUTPUT_PATH'], 'w')
    File "/home/inindekikral/anaconda3/lib/python3.6/os.py", line 669, in __getitem__
      raise KeyError(key) from None
  KeyError: 'OUTPUT_PATH'
  </code></pre>
  
  <p>My Operation System is Linux Mint 19 Cinnamon.
  What i have to do?</p>