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Oct 1st, 2009

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separate process

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Hi all.

i want to make separate process with python.

for example i have python code. for example:

Python Syntax (Toggle Plain Text)
import time
time.sleep(5)
print "Time Over"
import time
time.sleep(5)
print "Time Over"

named: t.py

and i want to do all ^^that^^ just on other process

i hope you understand.

AND DONT GIVE ME LINKS PLS. I GOOGLED THAT MUCH.
BUT NOTHING HELPFUL,
just WRITE CODE WHICH WOULD BE HELPFUL FOR ME!

sorry for My english

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Dixtosa

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Oct 1st, 2009

Re: separate process

One way to do it is to use the subprocess module

python Syntax (Toggle Plain Text)
import subprocess as SP
child_process = SP.Popen(["python", "t.py"])
import subprocess as SP
child_process = SP.Popen(["python", "t.py"])

Gribouillis

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Posting Maven

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Oct 1st, 2009

Re: separate process

Not sure what your asking?

Do you mean you want to create:

1. a thread which exists in the current process
2. a new process which exists independently

gerard4143

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Postaholic

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Oct 1st, 2009

Re: separate process

you're not making much sense... Do you want to have that processes running on another thread so you can continue doing something else? Do you just want to execute that little script then after it finishes it moves on? What are you trying to do EXACTLY?

ov3rcl0ck

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Oct 1st, 2009

Re: separate process

Gribouillis

and where can i donwload thatmodule?

gerard4143
2

ov3rcl0ck
I want to have that processes running on another thread and ability to continue doing something else.

and
I DONT want just to execute that little script then after it finishes it moves on.

Dixtosa

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Oct 1st, 2009

Re: separate process

ov3rcl0ck, for example, i have code:

...commands1...
...commands2...
call to t.py and imediately go on next command3
...commands3...
...commands4...

and i think separate process is the best in this time

Last edited by Dixtosa; Oct 1st, 2009 at 4:29 pm.

Dixtosa

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Oct 1st, 2009

Re: separate process

Click to Expand / Collapse Quote originally posted by Dixtosa ...

Gribouillis

and where can i donwload thatmodule?

gerard4143
2

ov3rcl0ck
I want to have that processes running on another thread and ability to continue doing something else.
and
I DONT want just to execute that little script then after it finishes it moves on.

Click to Expand / Collapse Quote originally posted by Dixtosa ...

ov3rcl0ck, for example, i have code:

...commands1...
...commands2...
call to t.py and imediately go on next command3
...commands3...
...commands4...

and i think separate process is the best in this time

First off Subprocess is a default module for python, next subprocess doesn't spawn a new thread, you need the multithreading module that comes default with the interpreter, also knowing object orientated programming will help. Try this little example:

Python Syntax (Toggle Plain Text)
import threading
 
class THREAD(threading.Thread):
	def __init__(self,ARG1,ARG2):
		#If you change the arugments of __init__ modify the bellow also
		self.arg1=ARG1
		self.arg2=ARG2
	def run(self):
		#THIS IS WERE YOUR CODE GOES!
 
t=THREAD(ARG1,ARG2)
t.start()
t.join()
import threading

class THREAD(threading.Thread):
	def __init__(self,ARG1,ARG2):
		#If you change the arugments of __init__ modify the bellow also
		self.arg1=ARG1
		self.arg2=ARG2
	def run(self):
		#THIS IS WERE YOUR CODE GOES!

t=THREAD(ARG1,ARG2)
t.start()
t.join()

The easiest way to do it is make a thread out of a function but this will lose alot of functionality and is a messy way of doing things IMO. Here it is:

Python Syntax (Toggle Plain Text)
import threading,thread
 
def THREAD(ARG1,ARG2):
	#YOUR CODE
thread.start_new_thread(THREAD, (ARG1,ARG2))
import threading,thread

def THREAD(ARG1,ARG2):
	#YOUR CODE
thread.start_new_thread(THREAD, (ARG1,ARG2))

ov3rcl0ck

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Oct 2nd, 2009

Re: separate process

code:

Python Syntax (Toggle Plain Text)
import threading
 
class THREAD(threading.Thread):
	def __init__(self,ARG1,ARG2):
		#If you change the arugments of __init__ modify the bellow also
		self.arg1=ARG1
		self.arg2=ARG2
	def run(self):
		print "RUN"
		#THIS IS WERE YOUR CODE GOES!
ARG1,ARG2=1,2
 
t=THREAD(ARG1,ARG2)
t.start()
t.join()
import threading
 
class THREAD(threading.Thread):
	def __init__(self,ARG1,ARG2):
		#If you change the arugments of __init__ modify the bellow also
		self.arg1=ARG1
		self.arg2=ARG2
	def run(self):
		print "RUN"
		#THIS IS WERE YOUR CODE GOES!
ARG1,ARG2=1,2

t=THREAD(ARG1,ARG2)
t.start()
t.join()

error:
Traceback (most recent call last):
File "D:\Desktop_MARI\threading\th.py", line 14, in <module>
t.start()
File "C:\Python25\lib\threading.py", line 432, in start
raise RuntimeError("thread.__init__() not called")
RuntimeError: thread.__init__() not called

Dixtosa

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Oct 2nd, 2009

Re: separate process

Python Syntax (Toggle Plain Text)
import threading
 
class THREAD(threading.Thread):
	def __init__(self,ARG1,ARG2):
		threading.Thread.__init__(self)
		#If you change the arugments of __init__ modify the bellow also
		self.arg1=ARG1
		self.arg2=ARG2
	def run(self):
		print "RUN"
		#THIS IS WERE YOUR CODE GOES!
ARG1,ARG2=1,2
 
t=THREAD(ARG1,ARG2)
t.start()
t.join()
import threading
 
class THREAD(threading.Thread):
	def __init__(self,ARG1,ARG2):
		threading.Thread.__init__(self)
		#If you change the arugments of __init__ modify the bellow also
		self.arg1=ARG1
		self.arg2=ARG2
	def run(self):
		print "RUN"
		#THIS IS WERE YOUR CODE GOES!
ARG1,ARG2=1,2

t=THREAD(ARG1,ARG2)
t.start()
t.join()

Forgot a line. But you do realize this is an example and i posted it so you can adjust it to your needs, if you don't understand it you're not ready for threading, so this script probably won't work, and if it does its not gonna do anything.If you don't understand it you're not ready for threading.

ov3rcl0ck

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Oct 2nd, 2009

Re: separate process

overclock, that isnot what i need.however,thank you .

Gribouillis, that was usefull. however i want to know how to multiproceess. i dont believe that it isnt possible.

Dixtosa

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