python-multithreading

I have a function foo that takes a pointer to memory as argument and both writes and reads to that memory: cdef void foo (double *data): data[some_index_int] = some_value_double do_something_dependent_on (data) I'm allocating to data like so: cdef int N = some_int cdef double *data = <double*> malloc (N * sizeof (double)) cdef int i for i in cython.parallel.prange (N, nogil=True): foo (data) readout (data) My question is now: how do the different threads treat this? My guess is that the memory pointed to by data will be shared by all threads and 'simultaneously' read from or written to while

I'm writing an app that appends lines to the same file from multiple threads. I have a problem in which some lines are appended without a new line. Any solution for this? class PathThread(threading.Thread): def __init__(self, queue): threading.Thread.__init__(self) self.queue = queue def printfiles(self, p): for path, dirs, files in os.walk(p): for f in files: print(f, file=output) def run(self): while True: path = self.queue.get() self.printfiles(path) self.queue.task_done() pathqueue = Queue.Queue() paths = getThisFromSomeWhere() output = codecs.open('file', 'a') # spawn threads for i in

I am trying to make a program that will launch both a view window (console) and a command line. In the view window, it would show constant updates, while the command line window would use raw_input() to accept commands that affect the view window. I am thinking about using threads for this, but I have no idea how to launch a thread in a new console window. How would I do that? Rather than use a console or terminal window, re-examine your problem. What you are trying to do is create a GUI. There are a number of cross-platform toolkits including Wx and Tkinter that have widgets to do exactly

I am trying to make a mailbox checker with imap lib, it work pretty fine with python, queue and multithread without gui. But when I try to put a gui, every fonction i made, make the gui freeze until finish . I tried many thing from various doc(add qthread, signal, cursorr etcc) and tutorials none worked for me . Can someone help me to understand how to set or append a text to a QtextEdit while running a function coz it work only after finish . Here is my code : class Checker(QtCore.QThread): signal = QtCore.pyqtSignal(object) def __init__(self, lignesmailtocheck): QtCore.QThread.__init__(self)

What's the difference between the threading and thread modules in Python? In Python 3, thread has been renamed to _thread . It is infrastructure code that is used to implement threading , and normal Python code shouldn't be going anywhere near it. _thread exposes a fairly raw view of the underlying OS level processes. This is almost never what you want, hence the rename in Py3k to indicate that it is really just an implementation detail. threading adds some additional automatic accounting, as well as several convenience utilities, all of which makes it the preferred option for standard Python