🌐 Mailman 3 September 2016 - Python-list - python.org

Class - error return
by Smith Sept. 6, 2016

Sept. 6, 2016

Hi, you can help me ? I can not understand where is the error in this script. Use Python3. In [71]: class Day(object): ...: def __init__(self,visits,contacts): ...: self.visits = visits ...: self.contacts = contacts ...: def __add__(self,other): ...: total_visits = self.visits + other.visits ...: total_contacts = self.contacts + other.contacts ...: return Day(total_visits,total_contacts) ...: def __radd__(self,other): ...: if other == 0: ...: return self ...: else: ...: return self.__add__(other) ...: def __str__(self): ...: return "Visitor: %i, Contacts: %i % (self.visits,self.contacts)" ...: ...: In [72]: day1 = Day(8,9) In [73]: day2 = Day(7,7) In [74]: print(day1) Visitor: %i, Contacts: %i % (self.visits,self.contacts) In [75]: print(day2) Visitor: %i, Contacts: %i % (self.visits,self.contacts)

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Python 3.5.0 python --version command reports 2.5.4
by nospam.Yang, Gang CTR (US) Sept. 6, 2016

Sept. 6, 2016

Hi, I just installed Python 3.5.0 (since 3.5.2 would not installed on Windows 2008 R2) and tried the python --version command. Surprisingly, the command reported 2.5.4. What's going on? Gang Yang Shonborn-Becker Systems Inc. (SBSI) Contractor Engineering Supporting SEC Office: 732-982-8561, x427 Cell: 732-788-7501<tel:732-740-4656> Email: gang.yang.ctr(a)mail.mil<mailto:gang.yang.ctr@mail.mil>

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Multiprocessing interactive processes with connections
by nospam.Charles Hixson Sept. 6, 2016

Sept. 6, 2016

I want to process a bunch of processes that all talk to each other. I've figured out how to do this using queues with the main process as the mail handler, but I'd rather have them talk directly. If I use connections, then I can pass the pipes to the processes, but there doesn't seem to be anything analogous to queue, so it looks like I need to divide each process into two threads, one of which does nothing but mail handling. Is this correct? FWIW, a small, unoptimized, test of the working "mailhandler" approach is: ## Multiprocessing: main thread as post office. # This is a bit clumsy, but it works. from multiprocessing import Process, Queue from queue import Empty def f(i, lim, q_rcv, q_snd): for j in range(lim): if i != j: q_snd.put([i, "message from process {0} to proess {1}".format(i, j), j]) if not q_rcv.empty(): val = q_rcv.get() print (val) q_snd.put([i, "done"]) while (not q_recv.empty()): val = q_rcv.get() print (val, " :: ", i) if val == "done": return if __name__ == '__main__': ps = [] qs = [] q_recv = Queue() for i in range(3): q = Queue() qs.append (q) ps.append (Process(target=f, args=(i, 3, q, q_recv)) ) for p in ps: p.start() dones = 0 try: v = q_recv.get(True, 1) while (v): print ("v = ", v) if v[1] == "done": dones = dones + 1 else: if len(v) == 3: assert v[2] < len(qs), "unexpected value" qs[v[2]].put(v[1]) else: print ("error: ", v, " was an unexpected value.") v = q_recv.get(True, 1) except Empty: print ("1: Timeout of maine receive queue") for q in qs: q.put("done") try: v = q_recv.get(True, 1) while (v): print ("2: v = ", v) if v[1] == "done": dones = dones + 1 else: if len(v) == 3: assert v[3] < len(qs), "2: unexpected value" qs[v[3]].put(v[2]) else: print ("2: error: ", v, " was an unexpected value.") v = q_recv.get(True, 1) except Empty: print ("2: Timeout of maine receive queue") for i in range(len(qs)): qs[i].close(); qs[i] = None

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Pythons for .Net
by Steven D'Aprano Sept. 6, 2016

Sept. 6, 2016

Yes, I said Pythons plural :-) For those wanting to use Python on .Net or Mono, there is some good news. Firstly, the venerable old "Python for .Net" project is still alive, and now supports up to Python 3.5 on .Net or Mono. PythonNet, as this is known, integrates the regular CPython interpreter with .Net or Mono. Secondly, we can also expect that IronPython will have a new lease of life. Continuing on the work of their predecessor, Jeff Hardy, the IronPython project now has two tech leads who will carry it forward: Alex Earl and Benedikt Eggers. https://thelasttechie.com/2016/07/24/its-back-python-for-net/ IronPython is a reimplementation of Python, written in C# as managed code for .Net. It doesn't use a GIL, and is sometimes considered a little faster than CPython, so this is good news for the Python ecosystem. IronPython: http://ironpython.net/ Python for .Net: https://github.com/pythonnet/pythonnet http://pythonnet.github.io/ https://pypi.python.org/pypi/pythonnet -- Steven “Cheer up,” they said, “things could be worse.” So I cheered up, and sure enough, things got worse.

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Re: Extend unicodedata with a name/pattern/regex search for character
by nospam.jladasky＠itu.edu Sept. 6, 2016

Sept. 6, 2016

On Saturday, September 3, 2016 at 7:49:14 PM UTC-7, Steve D'Aprano wrote: > On Sun, 4 Sep 2016 12:19 pm, Chris Angelico wrote: > > Killfile him and move on... > > But but but... I couldn't do that. > > https://www.xkcd.com/386/ I strongly suspected it would be that particular XKCD. :^)

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Installing python
by emaraiza98＠gmail.com Sept. 5, 2016

Sept. 5, 2016

I installed pycharm for a computer science class I'm taking, and also downloaded python 3.5.2. However, my computer for some reason won't use 3.5.2 and my professor told me I needed to download an earlier version to change the project interpreter. Whenever I try to use the earlier version of python for pycharm it says that "the SDK" seems invalid. I don't know what I'm doing wrong and was hoping someone would know what to do. I need to have everything installed and running by Wednesday.

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installing python
by emaraiza98＠gmail.com Sept. 5, 2016

Sept. 5, 2016

I installed pycharm for a computer science class, and installed python 3.5.2. However, my computer won't accept 3.5.2 so my teacher told me to install an earlier version to change the project interpreter. I did but when I tried to open python with pycharm it said that the "SKD is invalid". I don't know what I'm doing wrong and I have to have everything installed and running by Wednesday.

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manually sorting images?
by Ulli Horlacher Sept. 5, 2016

Sept. 5, 2016

I need to sort images (*.jpg), visually, not by file name. It looks, there is no standard UNIX tool for this job? So, I have to write one by myself, using Tkinter. Are there any high-level widgets which can help me, for example a file browser with thumbnails? -- Ullrich Horlacher Server und Virtualisierung Rechenzentrum TIK Universitaet Stuttgart E-Mail: horlacher(a)tik.uni-stuttgart.de Allmandring 30a Tel: ++49-711-68565868 70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/

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listdir
by Smith Sept. 5, 2016

Sept. 5, 2016

Hello to all, I wanted to know because even though the files are present on the directory I write input gives me "file not found". You can help me? Thank you a = input("Digita la directory dove vuoi trovare i file py: ") for file in os.listdir(a): if file.endswith(".py"): print(file) else: break print("File not found")

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Re: listdir
by Smith Sept. 5, 2016

Sept. 5, 2016

> > What exactly are you expecting the 'break' to do here? Can you explain > to me the intent of your code? > > ChrisA > I'd like to create a script that searches the directory .py files. If the script does not find the file extension .py would return the error message "File Not Found".

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