Import with multiple arguments: running python script in flask

Question

I have a python script main.py that takes in two arguments (2 text files)

I'm using MAC OS X Python 2.7

This runs easily on terminal with:

python main.py train.txt sample.txt

I have now developed a small front-end using Flask with very minor HTML as follows:

  #front.py FLASK
  from flask import Flask, render_template, request, redirect
  app = Flask(__name__)

  @app.route('/')
  def hello_world():
  return render_template('index.html')

  @app.route('/signup', methods = ['POST'])
   def signup():
    email = request.form['email']
    email1 = request.form['email1']
    # command below is just for testing, I wish to implement the same as this would if this would be typed in terminal.
    print("main.py " + email + " " + email1) 
   return redirect('/')

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

and the HTML

 <!DOCTYPE html>
   <html>
     <head>
       <title>T</title>
     </head>

     <body>
       <form action="/signup" method="post">
       <input type="text" name="email"></input>
       <input type="text" name="email1"></input>
       <input type="submit" value="Signup"></input>
       </form>
    </body>
  </html>

This HTML code is simply using a form to take in the 2 arguments ( I find this easier than JS as I have no experience with that).

I have just written the

    print("main.py " + email + " " + email1)

command above to test, it's not of any utility for now.

Usage of the parameters:

  #main.py

  from filter import Filter
  import sys

  # Get arguments from user
  train = sys.argv[1]
  messages = sys.argv[2]

  # Open files for reading and writing
  train_file = open(train, "rb")
  messages_file = open(messages, "rb")
  predictions_file = open("predictions.txt", "w")

 # Create new filter and train it using the train-file
 f = Filter()
f.train(train_file)

 #filter the messages in messages_file, write results to predictions_file
 f.filter(messages_file, predictions_file)

# Close all the files
 train_file.close()
 messages_file.close()
 predictions_file.close()

I wish to now run my script which is main.py via this flask application itself, and want to know how this is possible.

I was using import main with another app decorator say /exec and manually changing the URL to go from 127.0.0.2000 to 127.0.0.2000/exec but this was giving errors as main requires the arguments to be passed.

Sorry if I'm unclear in explaining the problem, please let me know if I can explain anything in a better way to help understand the problem.

Thank you

Answer 1

You need to rework this script slightly. You should put all the code that deals with input inside a name == '__main__' block as you do in the Flask app, and the rest inside a function that you call from that block:

def do_stuff(train, messages):
    # Open files for reading and writing
    train_file = open(train, "rb")
    ...
    predictions_file.close()

if __name__ == '__main__':
    # Get arguments from user
    train = sys.argv[1]
    messages = sys.argv[2]
    do_stuff(train, messages)

Now your Flask app can call main.do_stuff(email, email1) .

Import with multiple arguments: running python script in flask

Question

1 answers

solution1
3 ACCPTED 2017-02-06 18:25:29

Import with multiple arguments: running python script in flask

Question

1 answers

solution1 3 ACCPTED 2017-02-06 18:25:29

solution1
3 ACCPTED 2017-02-06 18:25:29