On 12/10/2011 8:46 AM Massimo Di Stefano said...
Hi All,
i'm tring to learn how to use threads in python to save a list of
object. i'm starting from this code :
Moving lista into the instance seems to do it...
Emile
#####
import threading
import urllib
from tempfile import NamedTemporaryFile
singlelock = threading.Lock()
class download(threading.Thread):
def __init__(self, sitecode, lista):
threading.Thread.__init__(self)
self.sitecode = sitecode
self.status = -1
self.lista = lista
def run(self):
url =
"http://waterdata.usgs.gov/nwis/monthly?referred_module=sw&site_no=";
url += self.sitecode
url +=
"&PARAmeter_cd=00060&partial_periods=on&format=rdb&submitted_form=parameter_selection_list"
tmp = NamedTemporaryFile(delete=False)
urllib.urlretrieve(url, tmp.name)
print "loaded Monthly data for sitecode : ", self.sitecode
self.lista.append(tmp.name)
print lista
sitecodelist = ["01046500", "01018500", "01010500", "01034500",
"01059000", "01066000", "01100000"]
lista = []
for k in sitecodelist:
get_data = download(k,lista)
get_data.start()
#####
it just print out the list generated during the thread execution, while
i'm tring to return it.
Trying to read the documentation, i'm looking on how to use "
threading.Lock() " and its methods "acquire() and release()" that seems
to be the solution to my issue
... but i'm really far to understand how to implement it in my example code.
thanks so much for any hints!
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