python怎么连续输出_如何在网页中持续显示Python输出？

I want to be able to visit a webpage and it will run a python function and display the progress in the webpage.

So when you visit the webpage you can see the output of the script as if you ran it from the command line.

Based on the answer here

I am trying to display output from PYTHON

I am trying to use Markus Unterwaditzer's code with a python function.

import flask

import subprocess

app = flask.Flask(__name__)

def test():

print "Test"

@app.route('/yield')

def index():

def inner():

proc = subprocess.Popen(

test(),

shell=True,

stdout=subprocess.PIPE

)

while proc.poll() is None:

yield proc.stdout.readline() + '
\n'

return flask.Response(inner(), mimetype='text/html') # text/html is required for most browsers to show the partial page immediately

app.run(debug=True, port=5005)

And it runs but I don't see anything in the browser.

解决方案

Hi looks like you don't want to call a test function, but an actual command line process which provides output. Also create an iterable from proc.stdout.readline or something. Also you said from Python which I forgot to include that you should just pull any python code you want in a subprocess and put it in a separate file.

import flask

import subprocess

import time #You don't need this. Just included it so you can see the output stream.

app = flask.Flask(__name__)

@app.route('/yield')

def index():

def inner():

proc = subprocess.Popen(

['dmesg'], #call something with a lot of output so we can see it

shell=True,

stdout=subprocess.PIPE

)

for line in iter(proc.stdout.readline,''):

time.sleep(1) # Don't need this just shows the text streaming

yield line.rstrip() + '
\n'

return flask.Response(inner(), mimetype='text/html') # text/html is required for most browsers to show th$

app.run(debug=True, port=5000, host='0.0.0.0')