I am writing a web application which would do some heavy work. With that in mind i thought of making the tasks as background tasks(non blocking) so that other requests are not blocked by the previous ones.
I went with demonizing the thread so that it doesn't exit once the main thread (since i am using threaded=True
) is finished, Now if user sends a requests my code will immediately tell them that their request is in progress(it'll be running in the background) and the application is ready to serve other requests.
My current application code looks something like this.
from flask import Flask
from flask import request
import threading
class threadClass:
def __init__(self):
thread = threading.Thread(target=self.run, args=())
thread.daemon = True # Daemonize thread
thread.start() # Start the execution
def run(self):
#
# This might take several minutes to complete
someHeavyFunction()
app = Flask(__name__)
@app.route('/start', methods=['POST'])
try:
begin = threadClass()
except:
abort(500)
return "Task is in progress"
def main():
"""
Main entry point into program execution
PARAMETERS: none
"""
app.run(host='0.0.0.0',threaded=True)
main()
I just want it to be able to handle a few concurrent requests (it's not gonna be used in production)
Could i have done this better? Did i miss anything? I was going through python's multi-threading package and found this
multiprocessing is a package that supports spawning processes using an API similar to the threading module. The multiprocessing package offers both local and remote concurrency, effectively side-stepping the Global Interpreter Lock by using subprocesses instead of threads. Due to this, the multiprocessing module allows the programmer to fully leverage multiple processors on a given machine. It runs on both Unix and Windows.
Can i demonize a process using multi-processing? How can i achieve better than what i have with threading module?
EDIT
okay so i went through the multi-processing package of python, it is similar to threading.
from flask import Flask
from flask import request
from multiprocessing import Process
class processClass:
def __init__(self):
p = Process(target=self.run, args=())
p.daemon = True # Daemonize it
p.start() # Start the execution
def run(self):
#
# This might take several minutes to complete
someHeavyFunction()
app = Flask(__name__)
@app.route('/start', methods=['POST'])
try:
begin = processClass()
except:
abort(500)
return "Task is in progress"
def main():
"""
Main entry point into program execution
PARAMETERS: none
"""
app.run(host='0.0.0.0',threaded=True)
main()
Does the above approach looks good?
Route messed up:
Another unix approach would probably be to use a global variable connection variable that the script runs more then once)
import sys
p = subprocess.Popen(['python, f', 'strings'], delimiter=',')
p .side_effects(p. split, continue)
TABS uses an added pipe, so you will need to do something recursively to replace, and inspect as the descriptor for each.
This just short side, a real painful practice can do this also is pravming the shell interface using the tube sun shell script.
If you actually get the echo refused on as a string loop you'd need a restful copy on each side when you try to read the string it contains. To get a chip X X number of queries, you have 2 libraries, arrays in that category and REST services. Each of them returned the same results.
If you're trying to find some way that you imported this from the command line, you need missing one argument and it has nothing to do with the first call to the developer.service
package while however ending a caller with the method 'python'. So deploy your environment command on them like this:
foo.py ou.com
graph.py
Since you are using PYTHON:
for _ in man.cluster.names():
print()
This will do the broker for you with an empty bash.
And contains a python script in your system.
You then need to go in an IP machine.
<-->>def show_retry(fetching_count):
#use retry to return
#todo_count = 400
#do rows here
#Keep a list of the possibility for the portion
#junk to get that count
for item in list:
list_id = item['id']
update_list.put(item)
tag.remove(date)
#should update the row at the second line that was removed
count = not-there(request, 'set_count', 0)
#set the count in the list
item = [item for item in jars for item in body for item in set(to_two) for item in not_made_list ]
-Socket will duplicates on you outside a block, so you can use replace_state is recognized as plain Python.
- Exists threading
- Inject your data into a container
- Define your route object exactly like
__init__
- for delegate:
class Ftp(object):
"""Runs sample applications outside of the Memory Class.
:environment
:It-need-this-or-has-no-serverconverter
:t
@threads:
def __init__(self):
super(ImageReleased, self).removemodel
parameters parameters parameters parameters {
'goMax': 60,
'maxParams': 200,
'=ofRequest': True,
'maxRows': 2,
'sizeLimit': 0,
'listenPriority': 1,
'posts': 1,
'reloadFromFixedRate': false,
'suitable': false}
def expressInt(url):
"""S is an actual (j) value in [name]." new initialize(keepVal="%d",resolveString(i))
int pos = None
return url #shall made out to use 3rd `${id} and `doc` (besides columns) as **%(+Id)*
form []div
requires:
"json_ doesn't support field with return value"
return return_value
def infinite():
finally:
StaticPrecosexholdOnNullNotNull()
class ReadabilityService(help(accountManager):
#OR
starting_number,initialize,neither22,any_object=create_its_instance,all_with_accounts=True,
allow_non_empty=True,
third=False,
default_parameter=3000,
initialize_any=TRUE,
probability=4,
correct=TRUE,
messagebinder=1,
convert_currency_values=True,
brew=Armap)
else:
blank=1
def extending_2frames(self):
template = mkicon.InitLocale (template=text)
print(' When saved to the router implicitly scoped')
a=save()
authrepo = "INTRO"
# Calculate how many converted avoid the problem.
aucp= patch.convert_to_32()
#efficiently through the pysale and allowing a kinds of systems to allocate a very flexible list foreach as milen,
# and a lookup is click from WEB-INF
balisch=dirs[0]
if factory:
print "logging ["+ freq[0] + "] at /* constructor, to find it in a "=TAG" solution (downloaded from "scripting/apt" smart)" WWW has a beginning < 1.003
return ..
else:
return RSS.http://www.bootstrant.com/code/1. html
And the whole head it's simple: http://www.mysysesql.com/skydifficulty/?rpassword=52
Can you share some data to some records that will contain quotes?
Branches are now a separately specifically written by Python and is nprotioly.
When you are using Python, it should be easier to use. We have to switch between MOST nssas while chose Nudger as stand-alone.
That is when the backend has written window, it really has some reason, cannot refactor it with Python.
There is no "make reference to project" files or whatever it does finding. His board just uses mongo to add classes to nesterhands.
Order of arguments controller for django protocol is really bad, I want to read them and comprience 'things like 'are you going to onto element through a js code(inserts/updated/allowed actions and all standard DELETE, THEN all click operations).
import os
import will do
import closed
def check_connection(self):
# create browser if its not available
# mean install navigate
self.driver = webdriver.Ie()
try:
url = Client.Driver()
self.driver = driver.get_element(DIR "/tmp/firefox.file")
handler.post_url("http://www.example.com", "my info")
config.add_handler('urllib2.pdfitem', url_for('css_new_url'))
]
Yes, asked
as such is not suitable (at least after the main thread with STATIC). So if your main()
has time to run run()
, then it is compatible with running
, and the status
is descriptor of keep
.
However, if your variable has the private state set to 0, you let's inspect logical 202 bits so that you can mix only start
and end
uitableview (like possibly test
first)
Change the statically fairly much, but you should be close enough:
Now those are where you can create an instance of a themselves
constructor (i.e. a __strong__
class, just a distribution of the resource file and folders):
http://docs.python.org/library/zip.html?zip=zip.ret
With some zip
code you can use only a while
statement:
- Adds an object
(a.zip(b. zipCode), zipFile.zip(a. zipCode))
- Copy the zip file
The process_args
method defines the parameters which in effect do not each point in the code. The main question is module
isn't args
, the default is not known. You need to use service.join()
. Any value of length
will be 10+ greater than 50 character long value.
In some cases the String type setting is terminates when instantiating a Tree crlf with utf8
used with StringBuilder
.
The GET /
images in URL-style means people have seen filtering the urls; the engine tries to verify vw. But AbsoluteURL contains some *required* string, which within Django might even print on the display-name.
But they are not aug-based stuff. No activities are attention to them. Was considering upload-url's? Does the second site show that they create a new web page that had no access by going to some color, then the rest and then throwing back me in the back-end system?
Live example list must be a tricks given add feature
http://docs.djangoproject.com/en/dev/topics/images/# for refresh help
The first thing I suggest you read is "How to solve the pen"?
I don't think that documentation were properly carefully provided. These two was similar, but let me try to thinking a process showing up, looking at the problem for 2 days... to check for this. messages are being @anohighings. Any help on how to coding that would be greatly appreciated!
def produces_result_json(json.loads(subject)):
if not dialog:
return
buffer = Queue.object_list
def success(response):
return "Successful detecting dialog debuguekesen?"
return response
response = render_to_response("app/visualyrr.html", output)

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It was generated by a neural network.