python-list@python.org discussions for November 2014

92	I love assert

I get the impression that most Pythonistas aren't as habituated with assert statements as I am. Is that just a misimpression on my part? If not, is there a good reason to assert less with Python than ...

Peter Cacioppi
Nov 11, 2014 at 7:40 pm
Nov 29, 2014 at 10:33 pm

83	python 2.7 and unicode (one more time)

Hello, My application is using gettext module to do the translation stuff. Translated messages are unicode on both python 2 and 3 (with python2.7 I had to explicitely asked for unicode). A problem ...

Francis Moreau
Nov 20, 2014 at 9:40 am
Nov 25, 2014 at 2:26 pm

51	PyWart: "Python's import statement and the history of external dependencies"

Python's attempt to solve the "external dependencies problem" has yet to produce the results that many people, including myself, would like. Actually, Python is not alone in this deficiency, no, ...

Rick Johnson
Nov 16, 2014 at 5:01 am
Nov 24, 2014 at 10:34 pm

37	How about some syntactic sugar for " __name__ == '__main__' "?

I have taught Python to several students over the past few years. As I have worked with my students, I find myself bothered by the programming idiom that we use to determine whether a module is being ...

John Ladasky
Nov 12, 2014 at 9:02 pm
Dec 2, 2014 at 8:47 pm

37	Quotation Ugliness

A problem for your consideration: We are given a tuple of delimiter string pairs to quote or comment text, possibly over multiple lines. Something like this: delims = (('"', '"'), ("'", "'"), ('#', ...

Tim Daneliuk
Nov 26, 2014 at 12:18 am
Nov 26, 2014 at 8:24 pm

35	BASTARDO CRIMINALE ASSASSINO DAVIDE SERRA TWITTER, ALGEBRIS E NAZI LEOPOLDA DI MERDA! LAVA EURO DI MAFIE DI MEZZO MONDO! INFILTRA & UCCIDE IL PD VIA CORROTTO MATTEO RENZI SU ORDINE (E MAZZETTE) DI FASCIOCAMORRISTA, STRAGISTA, PEDOFILO SILVIO BERLUSCO

BASTARDO CRIMINALE ASSASSINO DAVIDE SERRA TWITTER, ALGEBRIS E NAZI LEOPOLDA DI MERDA! LAVA EURO DI MAFIE DI MEZZO MONDO! INFILTRA & UCCIDE IL PD VIA CORROTTO MATTEO RENZI SU ORDINE (E MAZZETTE) DI ...

MICHELE CALZOLARI CREDIT SUISSE ASSOSIM
Nov 25, 2014 at 11:13 am
Jan 17, 2015 at 8:35 pm

29	How to access Qt components loaded from file?

I have this simple code that load any Qt Designer .UI file: from PySide.QtCore import QFile from PySide.QtGui import QApplication from PySide.QtUiTools import QUiLoader def loadui(file_name): loader ...

Juan Christian
Nov 18, 2014 at 12:18 pm
Nov 23, 2014 at 2:15 am

29	Understanding "help" command description syntax - explanation needed

Hello everyone, I'm a Python beginner and just getting familiar with it. (I need it for my EE B.Sc. project) For the learning purposes I use IDLE and (Learning Python by written by Mark Lutz). Let's ...

Ivan Evstegneev
Nov 5, 2014 at 11:00 am
Nov 7, 2014 at 3:03 pm

27	GUI toolkit(s) status

[A complementary info of my previous comment about "Leo 5.0 beta 2" not working] The single (not too buggy) GUI toolkit for CPython [*], which works smoothly, coherently and *SAFELY* is one of the Qt ...

Wxjmfauth
Nov 20, 2014 at 7:59 am
Nov 27, 2014 at 3:19 am

26	I have no class

What do I need to do to make a and b have different values? import random class RPS: throw=random.randrange(3) a=RPS b=RPS print ("a ",a.throw) print ("b ",b.throw) if a.throw == b.throw ...

Seymore4Head
Nov 23, 2014 at 2:47 am
Nov 24, 2014 at 1:48 pm

25	[Python-Dev] Dinamically set __call__ method

This list is for the development _of_ Python, not development _with_ Python. Try asking on Python List. (forwarding...) In 2.7 that would be a classic class, about which I know little. In 3.x you ...

Ethan Furman
Nov 4, 2014 at 6:23 pm
Nov 13, 2014 at 3:28 pm

24	Using Python for date calculations

I've finally found a use for Python. When, in the course of my genealogy research, I look at census or burial records, I often want to work out a person's date of birth from their age. It's a simple ...

Steve Hayes
Nov 21, 2014 at 8:35 am
Nov 22, 2014 at 5:34 am

23	[OFF-TOPIC] It is true that is impossible write in binary code, the lowest level of programming that you can write is in hex code?

I intend to write in lowest level of computer programming as a hobby. It is true that is impossible write in binary code, the lowest level of programming that you can write is in hex code? What is ...

Françai s
Nov 4, 2014 at 4:45 pm
Nov 6, 2014 at 5:24 pm

22	Communicating with a PHP script (and pretending I'm a browser)

I have a PHP app that I want to convert to django. But I want to do it stages. All the heavy lifting is in the PHP code, so first, I want to just use templates and views to generate the HTML, but ...

Larry Martell
Nov 11, 2014 at 3:48 pm
Nov 13, 2014 at 7:41 pm

21	Most gratuitous comments

And the award for the most gratuitous comments before an import goes to one of my (former) workmates, who wrote this piece of code: # Used for base64-decoding. import base64 # Used for ungzipping ...

Steven D'Aprano
Nov 20, 2014 at 4:58 am
Dec 4, 2014 at 5:12 pm

21	Python Signal/Slot + QThred code analysis

This is a continuation of my other topic "How to access Qt components loaded from file", it was getting big and the focus changed completely, the real question there was already answered, and we were ...

Juan Christian
Nov 23, 2014 at 1:44 pm
Nov 28, 2014 at 4:38 pm

20	caught in the import web again

Now, I'm getting these errors: ImportError: cannot import name ... and AttributeError: 'module' object has no attribute ... (what is 'module'?) Is there a way to resolve this without having to ...

Charles T. Smith
Nov 15, 2014 at 10:52 pm
Nov 18, 2014 at 10:58 pm

19	SQLite3 in Python 2.7 Rejecting Foreign Key Insert

I've built a database in SQLite3 to be embedded into a python application using wxPython 2.8.12 and Python 2.7.6. I'm using Sqliteman to manage the database directly and make changes to the structure ...

Llanitedave
Nov 23, 2014 at 2:11 am
Nov 25, 2014 at 6:40 am

19	I don't read docs and don't know how to use Google. What does the print function do?

Please help me this assignment is due in an hour. Don't give me hints, just give me the answer because I only want a grade. I'm not actually interested in learning how to program, but I know software ...

Sohcahtoa82
Nov 10, 2014 at 6:56 pm
Nov 14, 2014 at 11:15 am

19	Installing Parsers/Tree Builders to, and accessing these packages from Python2.7

Hi Programmers, I have downloaded, installed, and can access the LXMLTreeBuilder/lxml, from Python2.7. however I have also downloaded HTMLTreeBuilder/html5lib but cannot get console to recognize the ...

Simon Evans
Nov 1, 2014 at 2:17 pm
Nov 3, 2014 at 9:42 pm

18	I need algorithm for my task

I have line 'pythonpythonpyth'. How do I know which word is the foundation line?. Other examples: "pythonpythonpyth" is python "DOLORIUMD" is DOLORIUM "HELLOLHELLO" is HELLOL "thewordword" is ...

Lordvital21
Nov 5, 2014 at 11:58 am
Nov 7, 2014 at 1:42 am

17	Can you use self in __str__

def __str__(self): s = "Hand contains " for x in self.hand: s = s + str(x) + " " return s This is part of a Hand class. I need a hand for the dealer and a hand for the player. dealer=Hand() ...

Seymore4Head
Nov 28, 2014 at 1:26 am
Dec 4, 2014 at 7:52 pm

17	Challenge: optimizing isqrt

There is an algorithm for calculating the integer square root of any positive integer using only integer operations: def isqrt(n): if n < 0: raise ValueError if n == 0: return 0 bits = n.bit_length() ...

Steven D'Aprano
Nov 1, 2014 at 1:29 am
Nov 26, 2014 at 4:24 pm

17	unloading a module created with imp.new_module

If I create a module with imp.new_module(name), how can I unload it so that all the references contained in it are set to zero and the module is deleted? deleting the reference that is returned ...

Patrick Stinson
Nov 23, 2014 at 6:49 am
Nov 25, 2014 at 6:56 am

17	Comprehension with two variables - explanation needed

Hello guys, I would like to ask you for some explanations on comprehensions. (Don't be scared, it just some particular example ^_^) I found this little "find prime number" example over the internet ...

Ivan Evstegneev
Nov 23, 2014 at 2:56 pm
Nov 25, 2014 at 12:42 am

17	Infinitely nested containers

[[...]] The list appears to be ... infinitely nested: True Similar things can be done with non-empty list and dict: [1, [...]] True {0: {...}} True How is this behavior implemented under the hood? ...

Gill Shen
Nov 21, 2014 at 5:54 am
Nov 23, 2014 at 6:39 am

17	How to fix those errors?

Hello, I'm walking through an example that goes as follows: from PIL import Image import os for inputfile in filelist outputfile = os.path.splitext(inputfile)[0]+".jpg" if inputfile != outputfile ...

Abdul Abdul
Nov 16, 2014 at 9:32 pm
Nov 21, 2014 at 10:21 am

17	what can i do to improve my skill after finished python course on codecademy

i will finish the python course on codecademy soon,i dont konw how to improve my skill and what can i do to use it ,some projects ? should i learn others course ?

Fanhuhuai
Nov 1, 2014 at 3:01 pm
Nov 2, 2014 at 10:12 pm

16	A syntax question

I don't understand the following phenomenon. Could someone kindly explain it? Thanks in advance. M. K. Shen ------------------------------------------------- count=5 def test(): print(count) if ...

Mok-Kong Shen
Nov 10, 2014 at 11:07 am
Nov 11, 2014 at 9:04 am

15	generating unique variable name via loops

Hi, I want to generate a unique variable name for list using python. list1=... list2=... . . . listx=... where x is a number. You can remember it from saving a file in a directory. If you have ...

Fatih Güven
Nov 4, 2014 at 11:29 am
Nov 4, 2014 at 5:15 pm

14	Python IDE.

Can someone suggest a good python IDE.

Dvenkatj2eedev
Nov 20, 2014 at 7:01 pm
Nov 22, 2014 at 12:17 am

14	How modules work in Python

Hello, I'm new to Python, and just have a small question, and thought you might have an idea on it. I came across the following example that uses the Python Imaging Library (PIL): from PIL import ...

Abdul Abdul
Nov 16, 2014 at 7:36 pm
Nov 20, 2014 at 4:53 pm

14	Question about installing python and modules on Red Hat Linux 6

I am developing a python application as a contractor. I would like to know if someone can provide me with some insight into the problems that then infrastructure team has been having. The scope of ...

Pythonista
Nov 15, 2014 at 3:01 am
Nov 16, 2014 at 10:16 pm

13	How is max supposed to work, especially key.

In the Rosetta code I come across this part of LU-decomposition. def pivotize(m): """Creates the pivoting matrix for m.""" n = len(m) ID = [[float(i == j) for i in xrange(n)] for j in xrange(n)] for ...

Albert van der Horst
Nov 27, 2014 at 5:34 pm
Dec 4, 2014 at 3:47 pm

13	OTish: using short-term TCP connections to send to multiple slaves

Hi all This is a little bit OT for this newsgroup, but I intend to use python for prototyping at least, and I know there are a lot of knowledgeable people using Python in a Network context here... I ...

Jkn
Nov 16, 2014 at 12:02 pm
Nov 17, 2014 at 4:56 pm

12	Iterate over text file, discarding some lines via context manager

Hi all, I have a feeling that I should solve this by a context manager but since I've never used them I'm not sure what the optimal (in the python sense) solution is. So basically what I do all the ...

Fetchinson .
Nov 28, 2014 at 3:04 pm
Nov 29, 2014 at 8:00 am

12	fileno() not supported in Python 3.1

import sys for stream in (sys.stdin, sys.stdout, sys.stderr): print(stream.fileno()) io.UnsupportedOperation: fileno Is there a workaround?

Satishmlmlml
Nov 13, 2014 at 11:48 pm
Nov 16, 2014 at 5:29 am

12	Python script that does batch find and replace in txt files

Python script that does batch find and replace in txt files Need a python script that opens all .txt files in a folder find replace/delete text and save files. I have text files and I need to perform ...

Syed Khalid
Nov 9, 2014 at 7:58 pm
Nov 11, 2014 at 8:04 pm

11	"**" in python

Hello, I came across an example that showed the following: Wxy**2 What do ** mean here? Thanks. An HTML attachment was scrubbed... URL ...

Abdul Abdul
Nov 24, 2014 at 12:33 am
Dec 15, 2014 at 11:31 am

11	Call for information - What assumptions can I make about Unix users' access to Windows?

I'm in the process of developing an automated solution to allow users to quickly set up a Windows box so that it can be used to compile Python extensions and build wheels. While it can obviously be ...

Paul Moore
Nov 7, 2014 at 3:46 pm
Nov 20, 2014 at 9:51 pm

11	Using map()

I checked my modules with pylint and saw the following warning: W: 25,29: Used builtin function 'map' (bad-builtin) Why is the use of map() discouraged? It' such a useful thing.

Pavel Volkov
Nov 16, 2014 at 1:01 pm
Nov 17, 2014 at 6:56 am

11	Python extension using a C library with one 'hello' function

https://github.com/Veek/Python/tree/master/junk/hello doesn't work. I have: hello.c which contains: int hello(void); hello.h To wrap that up, i have: hello.py - _hello (c extension) - pyhello.c - ...

Veek M
Nov 4, 2014 at 9:52 am
Nov 4, 2014 at 6:28 pm

10	html page mail link to webmail program

Just in case that subject line is not perfectly clear: ;) My wife (using a Win7 machine) will be on a web page that has a link to mail somebody. She clicks on it, and it opens the currently installed ...

Ethan Furman
Nov 12, 2014 at 1:04 am
Dec 3, 2014 at 5:09 am

10	"Natural" use of cmp= in sort

Hi, I do agree with Raymond H. about the relative merits of cmp= and key= in sort/sorted, but I decided to also not let natural uses of cmp= pass silently. In answering this question, ...

Paddy
Nov 10, 2014 at 6:45 pm
Nov 12, 2014 at 8:09 am

9	Help with Python Multiprocessing

I am having trouble understanding the Multiprocessing module. I need to run three different files 'Worker1' , 'Worker2', 'Worker3' all at once. Currently I am doing this : from multiprocessing import ...

Anurag
Nov 13, 2014 at 6:07 pm
Nov 24, 2014 at 8:58 pm

9	io.UnsupportedOperation: fileno

import sys for stream in (sys.stdin, sys.stdout, sys.stderr): print(stream.fileno()) io.UnsupportedOperation: fileno

Satishmlmlml
Nov 13, 2014 at 11:23 pm
Nov 14, 2014 at 11:29 am

9	What does zip mean?

What does zip return in the following piece of code? curs.execute('select * from people') colnames = [desc[0] for desc in curs.description] rowdicts = [] for row in curs.fetchall() ...

Satishmlmlml
Nov 9, 2014 at 10:44 am
Nov 14, 2014 at 11:06 am

9	generating 2D bit array variants with specific algorythm

Hi, I need to generate all variants of a 2D array with variable dimension sizes which fit a specific rule. (up to 200*1000) The rules are: - Values are only 0 or 1 - the sum of each line bust be 1 - ...

Robert Voigtländer
Nov 7, 2014 at 3:39 pm
Nov 8, 2014 at 1:10 am

8	Db transactions and locking

Hi all I just learned something about database transactions, locking, and DB-API 2.0. I wondered why a PostgreSQL statement was hanging. On investigation, it was waiting to acquire a lock. On further ...

Frank Millman
Nov 27, 2014 at 10:24 am
Nov 28, 2014 at 3:44 pm

8	bug or feature in enum34 py2.7 backport?

Hi, Here are two programs both executed with Python 2.7 with the enum34 backport and their output. Is this a bug or intended behavior? (It may well be intended to help ensure that the class name is ...

Mark Summerfield
Nov 26, 2014 at 11:29 am
Nov 26, 2014 at 9:16 pm

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