stop thread from outside 'run'
Hi, I am using tornado web socket server to communicate between python(server) and browser(client). To mimic the behavior of sending data to client and get results back, I am using threaded approach: class JobThread(threading.Thread): "" def __init__(self, target): "" super(JobThread, self).__init__() self.target = target self.res = None self.stoprequest = threading.Event() self.start() self.join() # Execution stops here and wait return self.result() def run(self): """ Start this thread """ self.target() while not self.stoprequest.isSet(): print "running..." def result(self): "" return self.res def kill(self, result): """ Kill this thread """ self.res = result self.stoprequest.set() def ReceiveData(message): "" global t print str(message) t.kill(message) def SendData(data_string): "" sendMessageWS(data_string) result = JobThread(partial(SendData, data_string)) As soon as jobThread instance starts it sends data to websocket and wait for client to response. Client is sending back results but 'ReceiveData' is not getting called because of infinite loop in 'run' method. The only way you can stop the thread is from outside when "ReceiveData" executes and kill the threaded instance 't'. Any pointers? -- http://mail.python.org/mailman/listinfo/python-list
Another non blocking method in thread
Hi, I have created a very simple client-server model using sockets. Server is created by sub classing threading.thread. The 'run' method is continuously listening for client's response. When server send a string to client, client response back by changing that string into uppercase. I would like to synchronize send and receive. For example: def sendmsg(self, msg): self.client.send(msg) #wait until next msg is received in 'run' return self.response I tried using a while loop for waiting but it's blocking the 'run' method. Don't know much about threading event and lock and if they can help me here. Any pointers? Prashant -- http://mail.python.org/mailman/listinfo/python-list
post init call
class Shape(object): def __init__(self, shapename): self.shapename = shapename def update(self): print "update" class ColoredShape(Shape): def __init__(self, color): Shape.__init__(self, color) self.color = color print 1 print 2 print 3 self.update() User can sub-class 'Shape' and create custom shapes. How ever user must call 'self.update()' as the last argument when ever he is sub-classing 'Shape'. I would like to know if it's possible to call 'self.update()' automatically after the __init__ of sub-class is done? Cheers -- http://mail.python.org/mailman/listinfo/python-list
ImportError: No module named getopt
I am running a python script which has the line import getopt, sys, os, re, string And i get the error ImportError: No module named getopt Could you please point out a possible solution for this? -- http://mail.python.org/mailman/listinfo/python-list
Re: ImportError: No module named getopt
Thanks for the reply, I am actually using Cygwin to run a python script. I have python 2.5 installed. But when i ran the command mentioned by you... I see that it is looking in the wrong directories... how can i change these look up directories? Fredrik Lundh wrote: > "prashant" wrote: > > >I am running a python script which has the line > > > > import getopt, sys, os, re, string > > > > And i get the error > > > > ImportError: No module named getopt > > > > Could you please point out a possible solution for this? > > looks like a broken installation. try running the script as > > python -vv script.py > > and see where it looks for the getopt module. > > is the ImportError all you get, btw ? it doesn't complain about site.py > before > that ? > > -- http://mail.python.org/mailman/listinfo/python-list
Re: ImportError: No module named getopt
thanks a lot that helped... Fredrik Lundh wrote: > "prashant" wrote: > > > I am actually using Cygwin to run a python script. > > I have python 2.5 installed. But when i ran the command mentioned by > > you... I see that it is looking in the wrong directories... how can i > > change these look up directories? > > is PYTHONHOME perhaps set to the wrong thing? > > if not, you can point it to the root of your Python installation. use > "python -h" > for more alternatives. > > -- http://mail.python.org/mailman/listinfo/python-list
insert python script in current script
I was wondering is there any way to do this: I have written a class in python and __init__ goes like this: def __init__(self): self.name = 'jack' self.age = 50 import data now here there is data.py in the same directory and contents are like: self.address = 'your address' self.status = 'single' The problem is 'self' is giving some error here. I need to know if somehow I can do this. It's like inserting the script as it's part of the file itself. Cheers -- http://mail.python.org/mailman/listinfo/python-list
Temporary text for multiple entries
I am working to make a form where I have added multiple entries. I wish to add temporary text on all of them, as the text to be deleted when clicked and to inserted again when focused out. I have done with the single entry but not able to find a solution for multiple entries.Kindly suggest me a better way to do. -- https://mail.python.org/mailman/listinfo/python-list
Custom 'Float' class. Am I right here?
import sys
class Float(float):
"""
Custom float datatype with addtional attributes.
"""
def __new__(self,
value=0.0, #default value
name='', # string
range=(0.0, 1.0) # tuple
)
try:
self.name = name
self.range = range
self.pos = (1, 1)
return float.__new__(self, value)
except:
print ('Invalid value : Float = %s %s' % (str(value),
sys.exc_info()[:2]))
def setpos(self, value):
self.pos = value
def getpos(self):
return self.pos*2.0
p = property(getpos, setpos)
myFloat = Float(0.23)
print myFloat.pos
I am trying to create a custom 'float' datatype by subtyping default 'float'.
There are few things I would like to know here:
1. How to make 'name' & 'range' only readable attributes.
2. The property 'p' is not working as it has to. What's wrong here?
3. I would be heavily instancing this class, and I won't be creating any new
attribute on instance. Is there any way to optimize? __slots__?
Thanks
--
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subtype and super method. How to?
import sys
class Attribute(object):
"""
Common attributes and methods for custom types
"""
__slots__ = []
def __init__(self, name=None, type=None, range=(0,1)):
self.__name = name
self.__type = type
self.__range = range
#Read only attributes
name = property(lambda self: self.__name)
type = property(lambda self: self.__type)
range = property(lambda self: self.__range)
class Float(float, Attribute):
'''Custom Float type'''
__slots__ = ('__name', '__type', '__range')
def __new__(self, value=0.0, name=None, type=None, range=(0.0, 1.0)):
try:
super(Float, self).__init__(name=name, type=type, range=range)
return float.__new__(self, value)
except:
print 'Error : %s %s' % sys.exc_info()[:2]
class Int(int, Attribute):
'''Custom Int type'''
__slots__ = ('__name', '__type', '__range')
def __new__(self, value=0, name=None, type=None, range=(0, 1)):
try:
super(Int, self).__init__(name=name, type=type, range=range)
return int.__new__(self, value)
except:
print 'Error : %s %s' % sys.exc_info()[:2]
a = Float(2.0, name='myFloat')
print a
'Float' & 'Int' instances are not getting initialize. How to solve?
Thanks
--
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Volunteer help with porting
Hi everyone, My name is Prashant Kumar and I wish to contribute to the Python development process by helping convert certain existing python over to python3k. Is there anyway I could obtain a list of libraries which need to be ported over to python3k, sorted by importance(by importance i mean packages which serve as a dependency for larger number of packages being more important). I had originally mailed the python-dev mailing list and was pointed to this ML so that I could get details regarding 3rd party libraries which need to be ported. Thanks, Prashant Kumar -- http://mail.python.org/mailman/listinfo/python-list
