Tree library that allows conditions on nodes and will return the node

LibreOffice has a huge class tree and I need to familiarize myself with it - trouble is, it won't fit on A4 because it has a flat hierarchy with loads of leaf nodes. I wanted to shove all the leaf nodes > x into a subgraph and style that differently using Graphviz. I tried treelib but while i

Re: Selenium script - stuck - could someone take a look?

On 2021-05-29, Dennis Lee Bieber wrote: > On Sat, 29 May 2021 09:40:35 - (UTC), Veek M declaimed > the following: > ah, yeah - man that took me a while to do (save to local file and use file:///). It's working now, basically xpath mistake because I've forgotten stuff.. but t

Selenium script - stuck - could someone take a look?

Script: http://paste.debian.net/1199271/ It mostly works but line 78 is supposed to extract 100 pieces / lot No matter what I try it's failed and I DON'T KNOW WHY? It's a simple div.classname match.. Could someone take a look and figure it out - I'm stuck.

Re: Selenium script - stuck - could someone take a look?

On 2021-05-29, Veek M wrote: fixed div './/' vs '//' -- https://mail.python.org/mailman/listinfo/python-list

Pandas: How does df.apply(lambda work to create a result

t = pd.DataFrame([[4,9],]*3, columns=['a', 'b']) a b 0 4 9 1 4 9 2 4 9 t.apply(lambda x: [x]) gives a[[1, 2, 2]] b[[1, 2, 2]] How?? When you 't' within console the entire data frame is dumped but how are the individual elements passed into .apply()? I can't do lambda x,y: [x,y]

Re: Why is a generator expression called a expression?

but one can do the following (x for x in 'apple').next() * 2 def foo(): (yield 2) foo().next() * 3 (lambda x: 2)()*4 generator expr, yield expr, lambda expression all require some modification (insertion of a .next or explicit () so it's quite confusing.. expression seems to mean

Re: Why is a generator expression called a expression?

Also you will note, one can do: ( 2 if 3 > 2 else 4 ) + 4 so the () is just for precedence but otherwise a Conditional Expression works as expected by returning a value to be added to + 4. -- https://mail.python.org/mailman/listinfo/python-list

Re: Why is a generator expression called a expression?

On Mon, 20 Apr 2020 19:19:31 +1000, Chris Angelico wrote: > In the case of a genexp, the expression has a value which is a generator > object. When you pass that to all(), it takes it and then iterates over but an object is NOT THE SAME as it's value! '2' is an object which happens to have a

Why is a generator expression called a expression?

The docs state that a expression is some combination of value, operator, variable and function. Also you cannot add or combine a generator expression with a value as you would do with 2 + 3 + 4. For example, someone on IRC suggested this all(a == 'a' for a in 'apple') but 1. all is a

Decorator as a class and Descriptor __get__ working? - cookbook, 9.9, pg 349

I did not follow the grok bit.. He's creating a Descriptor within class 'Spam' by doing @Profiled def bar() because Profiled replaces 'bar' with it's instance that contains __get__ which means I have to do s.grok = 20 to trigger it? Which would imply, s.__get__(instance, instance, value) NOT

Re: Extending property using a Subclass - single method - why Super(Baz, Baz).name.__set__ ?

you've misunderstood my question, let me try again: So this is a simple descriptor class and as you can see, dunder-set needs 3 args: the descriptor CONTAINER/Bar-instance is the first arg, then a reference to the using instance/Foo-instance class Bar(object): def __set__(self,

Extending property using a Subclass - single method - why Super(Baz, Baz).name.__set__ ?

class Foo(object): @property def name(self): if hasattr(self, '_name'): print('Foo name', self._name) return self._name else: return 'default' @name.setter def name(self, value): print('Foo', self) self._name =

Is there a piece of code ('inspect') that displays all/most of the attributes/methods in a frame, traceback, generator object in a readable fashion

Basically I want to call a method and pretty print the object contents for some code I'm playing with. Instead of manually writing all this crud. Something like a python object explorer. def foo(a, x = 10): 2 + 2 def bar(): pass class A: pass class Foo(A, object): def

Re: multiprocessing article on PYMOTW - subclassing with 'def run' and 'logging'

answered here https://www.reddit.com/r/Python/comments/dxhgec/ how_does_multiprocessing_convert_a_methodrun_in/ basically starts two PVMs - the whole fork, check 'pid' trick.. one process continues as the main thread and the other calls 'run' --

multiprocessing article on PYMOTW - subclassing with 'def run' and 'logging'

https://pymotw.com/2/multiprocessing/basics.html https://pymotw.com/2/threading/ I didn't follow this 1. >The logger can also be configured through the logging configuration file >API, using the name multiprocessing. and 2. >it is also possible to use a custom subclass. > import

Re: What is a backing store in the context of module io https://docs.python.org/3/library/io.html

On Mon, 11 Nov 2019 16:08:12 +, Veek M wrote: > So i was making some notes and: https://i.imgur.com/UATAKXh.png > > I did not understand this > > https://docs.python.org/3/library/io.html 'Text I/O expects and produces > str objects. This means that whenever the backing

What is a backing store in the context of module io https://docs.python.org/3/library/io.html

So i was making some notes and: https://i.imgur.com/UATAKXh.png I did not understand this https://docs.python.org/3/library/io.html 'Text I/O expects and produces str objects. This means that whenever the backing store is natively made of bytes (such as in the case of a file), encoding and

SSL/TLS in Python using STARTTLS and ssl/ssltelnet and telnetlib

Could someone suggest some introductory reading material that will allow me to use 'telnetlib' with 'ssl' or 'ssltelnet'. (currently using Pan since Knode is dropped on Debian) I'm trying to write something that will download the NNTP headers over TLS. The idea is to 1. telnet to port 119,

What PEPs are worth reading after you've read a textbook/Beazley but want to understand details/innerworkings

sez it all really, among the Finished PEPs, which ones should I pore through to teach Python competently! What PEPs are considered de rigueur? What PEPs do you guys consider note- worthy? https://www.python.org/dev/peps/ -- https://mail.python.org/mailman/listinfo/python-list

Re: __instancecheck__ metaclasses, how do they work: why do I get True when I tuple, why doesn't print run?

> > Aha. You're trying to fix up the metaclass after the fact, which is not > the right way to do it. If you change the class definitions to: > __metaclass__ = whatever; # is python2.x syntax > then you get the prints from MyMeta.__instancecheck__(). The > isinstance() still returns True,

__instancecheck__ metaclasses, how do they work: why do I get True when I tuple, why doesn't print run?

1. Why do I get True whenever i tuple the isinstance(f, (Bar, Foo)) (and why don't the print's run) The docs say that you can feed it a tuple and that the results are OR'd The form using a tuple, isinstance(x, (A, B, ...)), is a shortcut for isinstance(x, A) or isinstance(x, B) or ...

Re: PyQt: Parenting a Widget

On Tuesday, September 26, 2017 at 2:23:22 PM UTC+5:30, Thomas Jollans wrote: > On 2017-09-26 08:16, Veek M wrote: > > On Tuesday, September 26, 2017 at 11:18:54 AM UTC+5:30, Veek M wrote: > >> Summary: Could someone explain widget and dialog parenting - the text book > &

Re: PyQt: Parenting a Widget

On Tuesday, September 26, 2017 at 11:18:54 AM UTC+5:30, Veek M wrote: > Summary: Could someone explain widget and dialog parenting - the text book is > not making sense. > ## > I'm trying to understand widget parenting, from the book: Rapid GUI > Prog

Re: PyQt: viewport vs window - how do you translate co-ordinates?

On Saturday, September 23, 2017 at 8:44:25 PM UTC+5:30, Michael Torrie wrote: > On 09/23/2017 05:38 AM, Veek M wrote: > > I didn't understand any of that - could someone expand on that para? > > Is there a reading resource that explains the Viewport and translations? I > > a

PyQt: viewport vs window - how do you translate co-ordinates?

pg 329, Rapid GUI Programming http://storage4.static.itmages.com/i/17/0923/h_1506165624_2588733_59fdfcd4cc.png In PyQt terminology the physical coordinate system is called the “viewport”, and confusingly, the logical coordinate system is called the “window”. In Figure 11.4,

Re: Signals and Slots - Summerfield - what exactly is a signal?

Steve D'Aprano wrote: > On Sun, 6 Aug 2017 12:28 am, veek wrote: > >> 1. What exactly is a signal. In hardware, an interrupt can be viewed as a >> signal and the voltage on a pin will suddenly jump to +5V as an indicator >> that an interrupt has occurred. With Qt signal

Signals and Slots - Summerfield - what exactly is a signal?

1. What exactly is a signal. In hardware, an interrupt can be viewed as a signal and the voltage on a pin will suddenly jump to +5V as an indicator that an interrupt has occurred. With Qt signals - if a widget-c++ code has to 'signal' an event - what does it do? As a consequence of not

Re: Is there a way to insert hooks into a native dictionary type to see when a query arrives and what's looked up?

Steven D'Aprano wrote: > On Wednesday 14 December 2016 17:11, Veek M wrote: > >> I know that with user classes one can define getattr, setattr to >> handle dictionary lookup. Is there a way to hook into the native >> dict() type and see in real time what's being

Is there a way to insert hooks into a native dictionary type to see when a query arrives and what's looked up?

I know that with user classes one can define getattr, setattr to handle dictionary lookup. Is there a way to hook into the native dict() type and see in real time what's being queried. I wanted to check if when one does: x.sin() if the x.__dict__ was queried or if the Foo.__dict__ was

Re: Nested functions, how do they work (stack related)

Marko Rauhamaa wrote: > Veek M <vek.m1...@gmail.com>: > >> https://en.wikipedia.org/wiki/Call_stack >> >> 'Programming languages that support nested subroutines also have a >> field in the call frame that points to the stack frame of the latest >> act

Re: Nested functions, how do they work (stack related)

http://web.archive.org/web/20111030134120/http://www.sidhe.org/~dan/blog/archives/000211.html (great tail recursion article - best i've seen! SO doesn't really explain it unless you already knew it to begin with, but here's the

Re: Nested functions, how do they work (stack related)

Veek M wrote: > I was reading the wiki on 'Call stack' because I wanted to understand > what a traceback object was. My C/C++ isn't good enough to deal with > raw python source since I have no background in CS. Also, you just > can't dive into the python src - it takes a good dea

Nested functions, how do they work (stack related)

I was reading the wiki on 'Call stack' because I wanted to understand what a traceback object was. My C/C++ isn't good enough to deal with raw python source since I have no background in CS. Also, you just can't dive into the python src - it takes a good deal of reading and background.. (the

Re: % string formatting - what special method is used for %d?

Ian Kelly wrote: > On Sat, Dec 10, 2016 at 11:40 PM, Veek M <vek.m1...@gmail.com> wrote: >> Well take a look at this: >> ### >> #!/usr/bin/python >> >> class Foo(int): >> def __init__(self, value): >&g

Re: % string formatting - what special method is used for %d?

Steve D'Aprano wrote: > On Sat, 10 Dec 2016 06:06 pm, Veek M wrote: > >> When we do: >> >> print '%s %d' % ('hello', 10) >> >> what special method is being invoked internally within the string- >> format-specifier? > > %d requires the argum

% string formatting - what special method is used for %d?

When we do: print '%s %d' % ('hello', 10) what special method is being invoked internally within the string- format-specifier? format() invokes format__ print invokes __str__ I'm basically trying to make sense of: raise TypeError('urkle urkle %s' % list(dictionary)) <=> raise

Re: Simple code and suggestion

g thakuri wrote: > Dear Python friends, > > I have a simple question , need your suggestion the same > > I would want to avoid using multiple split in the below code , what > options do we have before tokenising the line?, may be validate the > first line any other ideas > > cmd = 'utility

Re: Working around multiple files in a folder

Emile van Sebille wrote: > On 11/21/2016 11:27 AM, subhabangal...@gmail.com wrote: >> I have a python script where I am trying to read from a list of files >> in a folder and trying to process something. As I try to take out the >> output I am presently appending to a list. >> >> But I am trying

Re: variable argument unpacking

Peter Otten wrote: > Mehrzad Irani wrote: > >> Hi All, >> >> Consider the situation >> [cti@iranim-rhel python_cti]$ cat a.py >> def a(a = 1, b = 2, c = 3, *d, **e): >> print(a, b, c) >> print(d) >> print(e) >> >> r = {'e': 7, 'f': 8, 'g': 9} >> >> >> a(**r) >> a(3,

Re: dictionary mutability, hashability, __eq__, __hash__

Veek M wrote: > Jussi Piitulainen wrote: > >> Veek M writes: >> >> [snip] >> >>> Also if one can do x.a = 10 or 20 or whatever, and the class >>> instance is mutable, then why do books keep stating that keys need >>> to be >>

Re: dictionary mutability, hashability, __eq__, __hash__

Jussi Piitulainen wrote: > Veek M writes: > > [snip] > >> Also if one can do x.a = 10 or 20 or whatever, and the class instance >> is mutable, then why do books keep stating that keys need to be >> immutable? After all, __hash__ is the guy doing all the work

dictionary mutability, hashability, __eq__, __hash__

I was reading this: http://stackoverflow.com/questions/4418741/im-able-to-use-a-mutable-object-as-a-dictionary-key-in-python-is-this-not-disa In a User Defined Type, one can provide __hash__ that returns a integer as a key to a dictionary. so: d = { key : value } What is the significance of

Re: What is the difference between class Foo(): and class Date(object):

Steve D'Aprano wrote: > On Mon, 21 Nov 2016 11:15 pm, Veek M wrote: > >>>>> class Foo(): >> ... pass >> ... >>>>> class Bar(Foo): >> ... pass >> ... >>>>> b = Bar() >>>>> type(b) >> > [

What is the difference between class Foo(): and class Date(object):

>>> class Foo(): ... pass ... >>> class Bar(Foo): ... pass ... >>> b = Bar() >>> type(b) >>> class Date(object): ... pass ... >>> class EuroDate(Date): ... pass ... >>> x = EuroDate() >>> type(x) What is going on here? Shouldn't x = EuroDate(); type(x) give 'instance'?? Why is 'b'

What exactly is a python variable?

In C: int x = 10; results in storage being allocated and type and location are fixed for the life of the program. In Python, x = 10 causes an object '10' to be created but how exactly is 'x' handled? Symbol Table lookup at compile time? Is every 'x' being substituted out of existence?

__debug__ http://stackoverflow.com/questions/15305688/conditional-debug-statement-not-executed-though-debug-is-true

Trying to make sense of that article. My understanding of debug was simple: 1. __debug__ is always True, unless -O or -OO 2. 'if' is optimized out when True and the expr is inlined. So what does he mean by: 1. 'If you rebind __debug__, it can cause symptoms' 2. 'During module compilation, the

Re: __debug__ http://stackoverflow.com/questions/15305688/conditional-debug-statement-not-executed-though-debug-is-true

Veek M wrote: > Trying to make sense of that article. My understanding of debug was > simple: > 1. __debug__ is always True, unless -O or -OO > 2. 'if' is optimized out when True and the expr is inlined. > > So what does he mean by: > > 1. 'If you rebind __debug__, it

Re: Web Scraping

Steve D'Aprano wrote: > On Sat, 12 Nov 2016 11:07 pm, Veek M wrote: > >> 121sukha wrote: >> >>> I am new to python and I want to use web scraping to download songs >>> from website. how do I write code to check if the website has >>> uploade

Re: Web Scraping

121sukha wrote: > I am new to python and I want to use web scraping to download songs > from website. how do I write code to check if the website has uploaded > a new song and have that song automatically be downloaded onto my > computer. I know how to use the requests.get() module but i am more

Re: Need help in python program

id_1, clk, val = foo_function() id_2, key, units, delay = bar_function() if id_1 == id_2: print id_1, clk, val, key, units, delay -- https://mail.python.org/mailman/listinfo/python-list

Re: problem using pickle

Ben Finney wrote: > "Veek. M" <vek.m1...@gmail.com> writes: > >> class Foo(object): >> pass >> >> object is a keyword and you're using it as an identifier > > Python does not have ‘object’ as a keyword. ‘and’ is a keywo

Re: problem using pickle

Rustom Mody wrote: > On Saturday, July 2, 2016 at 9:17:01 AM UTC+5:30, Veek. M wrote: >> object is a keyword and you're using it as an identifier > > keyword and builtin are different > In this case though the advice remains the same > In general maybe not... > Ju

Re: Windows switch between python 2 and 3

Daiyue Weng wrote: > Hi, I installed Python 2.7 and Python 3.5 64 bit versions on Win 10. > Under > > C:\Python35 > > C:\Python27 > > Both have been set in environment variable Path. > > When I type python in cmd, it only gives me python 2.7, I am wondering > how to switch between 2 and 3 in

Re: Iteration, while loop, and for loop

Elizabeth Weiss wrote: > words=["hello", "world", "spam", "eggs"] > counter=0 > max_index=len(words)-1 > > while counter<=max_index: > word=words[counter] > print(word + "!") > counter=counter + 1 while 0 < 10: get 0'th element do something with element increment 0 to 1 (repeat)

Re: PyQT - Signals and Slots?

Mark Summerfield wrote: > > The ZeroSpinBox is a tiny example designed to show how the signal/slot > mechanism works. It is just a QSpinBox with the addition of > remembering how many times (all the) ZeroSpinBox(es) have had a 0 > value. > > Nowadays the connections would be made with a new

PyQT - Signals and Slots?

I'm reading Rapid GUI Programming - Mark Summerfield with Python and QT pg 131. Basically the mechanism is an event table which maps a 'signal' to a 'function/slot' -correct? self.connect(dial, SIGNAL("valueChanged(int)"), spinbox.setValue) Here, dial.valueChanged -> spinbox.setValue

Re: h(re) for help, import re - on NameError

Chris Angelico wrote: > On Thu, Sep 22, 2016 at 8:10 PM, Veek M <vek.m1...@gmail.com> wrote: >> Is there a way to use .pythonrc.py to provide a help function that >> autoloads whatever module name is passed like so: >> \>>> h(re) >> >> I tried

Re: Pasting code into the cmdline interpreter

eryk sun wrote: > On Thu, Sep 22, 2016 at 12:40 PM, Gregory Ewing > wrote: >> eryk sun wrote: >>> >>> Actually in a Unix terminal the cursor can also be at >>> the end of a line, but a bug in Python requires pressing Ctrl+D >>> twice in that case. >> >> I wouldn't

h(re) for help, import re - on NameError

Is there a way to use .pythonrc.py to provide a help function that autoloads whatever module name is passed like so: \>>> h(re) I tried inheriting site._Helper and overriding __init__ and __call__ but that didn't work, also I don't know how to deal/trap/catch the NameError (no quotes on h(re))

Re: Pasting code into the cmdline interpreter

Ben Finney wrote: > Veek M <vek.m1...@gmail.com> writes: > >> Ben Finney wrote: >> >> > Since you are writing code into a module file, why not just run the >> > module from that file with the non-interactive Python interpreter? >> > >>

Re: Pasting code into the cmdline interpreter

eryk sun wrote: > On Thu, Sep 22, 2016 at 5:12 AM, Veek M <vek.m1...@gmail.com> wrote: >> 2. Blank lines in my code within the editor are perfectly acceptable >> for readability but they act as a block termination on cmd line. > > You can write a simple pa

Re: Pasting code into the cmdline interpreter

Ben Finney wrote: > Veek M <vek.m1...@gmail.com> writes: > >> 1. I had to turn on highlighting to catch mixed indent (which >> is a good thing anyways so this was resolved - not sure how tabs got >> in anyhow) > > The EditorConfig system is a growing con

Pasting code into the cmdline interpreter

I wanted to test this piece of code which is Kate (editor) on the cmd line python >>> prompt: tex_matches = re.findall(r'(\\\w+{.+?})|(\\\w+)', msg) for tex_word in tex_matches: repl = unicode_tex.tex_to_unicode_map.get(tex_word) if repl is None: repl = 'err' msg =

Re: Extend unicodedata with a name/pattern/regex search for character entity references?

Veek 'this_is_not_my_name' M wrote: > Rustom Mody wrote: > >> On Saturday, September 3, 2016 at 5:25:48 PM UTC+5:30, Veek. M wrote: >>> https://mail.python.org/pipermail//python-ideas/2014-October/029630.htm >>> >>> Wanted to know if the above link idea,

Re: Extend unicodedata with a name/pattern/regex search for character entity references?

Rustom Mody wrote: > On Saturday, September 3, 2016 at 5:25:48 PM UTC+5:30, Veek. M wrote: >> https://mail.python.org/pipermail//python-ideas/2014-October/029630.htm >> >> Wanted to know if the above link idea, had been implemented and if >> there's a module that

Re: Extend unicodedata with a name/pattern/regex search for character entity references?

ier. > > In fact, I have recommended doing that several times to people who > only used their nickname in the “From” header field value. > >> So Veek should be able to appease P.E. by calling >> himself 'Veek "David Smith" M'. > > That would not help. “Veek” mig

Re: Extend unicodedata with a name/pattern/regex search for character entity references?

have absolutely no legitimate > reason to believe that Veek is not his or her real name. > > You owe Veek an apology, and a promise to the entire community that > you will not act in such a bigoted, racist manner again. > > > ah umm.. I'm not overly offended - it was more

Re: Extend unicodedata with a name/pattern/regex search for character entity references?

Thomas 'PointedEars' Lahn wrote: > Veek. M wrote: > >> https://mail.python.org/pipermail//python-ideas/2014-October/029630.htm >> >> Wanted to know if the above link idea, > > … which is 404-compliant; the Internet Archive does not have it either > … > &

Extend unicodedata with a name/pattern/regex search for character entity references?

https://mail.python.org/pipermail//python-ideas/2014-October/029630.htm Wanted to know if the above link idea, had been implemented and if there's a module that accepts a pattern like 'cap' and give you all the instances of unicode 'CAP' characters. ⋂ \bigcap ⊓ \sqcap ∩ \cap ♑ \capricornus

Scapy: sniff(filter='icmp', iface='ppp0', prn=icmp_callback)

#!/usr/bin/python import logging logging.getLogger("scapy.runtime").setLevel(logging.ERROR) from scapy.all import TCP, IP, ICMP, sniff def ip_callback(pkt): print '--- IP--' pkt.show() print 'IP', pkt.src, pkt.sport, '--->', pkt.dst,

How do you guys tackle a package with poorish documentation?

I've been messing with QQ (a Chinese chat app) and started receiving a lot of shady traffic partly because I was stupid enough to install the insecure QQ=international version. Anyway, so I decided to write something to provide me with a diff for networks. Basically track my current n/w with

Re: subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window

Steven D'Aprano wrote: > On Tuesday 12 July 2016 13:20, Veek. M wrote: > >> Script grabs some image data and runs imagemagick on it to extract >> some chinese. Then tesseract OCR to get the actual unicode. >> >> I then need to get it translated which also work

subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window

Script grabs some image data and runs imagemagick on it to extract some chinese. Then tesseract OCR to get the actual unicode. I then need to get it translated which also works and then display in XTerm using cat. I could cat << named_pipe but I was wondering if this was the only way? Could I

Re: super and mix-in class: how exactly is the search order altered?

dieter wrote: > "Veek. M" <vek.m1...@gmail.com> writes: >> ... >> I'm reading this article: >> https://rhettinger.wordpress.com/2011/05/26/super-considered-super/ >> >> He's trying to explain the purpose of a 'mix-in class' and he says >>

Re: Descriptor: class name precedence over instance name

Ian Kelly wrote: > On Sat, Jul 2, 2016 at 3:34 AM, Veek. M <vek.m1...@gmail.com> wrote: >> So essentially from what Ian said: >> data_descriptor_in_instance -> instance_attribute -> non- >> data_descriptor_in_instance -->__mro__ >> >> is how th

Re: Descriptor: class name precedence over instance name

Ben Finney wrote: > "Veek. M" <vek.m1...@gmail.com> writes: > >> Trying to make sense of this para: > > At the risk of being ruse, I am trying to make sense of some > paragraphs in the messages you write here. Could you take a little > more time to

Descriptor: class name precedence over instance name

Trying to make sense of this para: -- Also, the attribute name used by the class to hold a descriptor takes prece- dence over attributes stored on instances. In the previous example, this is why the descriptor object takes a name parameter and why

Re: problem using pickle

Nicky Mac wrote: > Dear Python team, > I have studied the excellent documentation, and attempted to make use > of pickle thus: > > filename = 'my_saved_adventure' > import pickle > class object: > def __init__(self,i,.t) : > self.id = i > . > > class

Re: subprocess startup error

Shweta Dinnimani wrote: > hi > > hello, I'm begineer to python programming.. I had installed python > 3.5.1 version on my windows 7 system. I was fine earlier and now when > i was trying the programs on string i'm facing the subprocess startup > error. IDLE is not connecting. And python shell is

Re: why x is changed in the following program?

maurice.char...@telecom-paristech.fr wrote: > from numpy import random > x=random.randn(6) > y=x > y[0]=12 > print x[0] > > > random.rand returns a list. x is a label to this list (container). y=x creates another label to the same container/list. y[0[ = 12 alters the 0th position of the

super and mix-in class: how exactly is the search order altered?

I had posted this on StackOverflow - it's an excellent example of why SO sucks (don't want that happening here so please read carefully): http://stackoverflow.com/questions/38145818/super-and-mix-in-class-how-exactly-is-the-search-order-altered?noredirect=1#comment63722336_38145818 I'm reading

Re: Descriptors vs Property

Thomas 'PointedEars' Lahn wrote: >>> Nobility lies in action, not in name. >>> —Surak Someone called Ned.B who i know elsewhere spoke on your behalf. I'm glad to say I like/trust Ned a bit so *huggles* to you, and I shall snip. Also, sorry about the 'Steve' thing - bit shady dragging in

Re: Descriptors vs Property

Thomas 'PointedEars' Lahn wrote: > Veek. M wrote: > >> Thomas 'PointedEars' Lahn wrote: >>>> I haven't read the descriptor protocol as yet. >>> You should. You should also trim your quotations to the relevant >>> minimum, and post using your real na

Re: Descriptors vs Property

Thomas 'PointedEars' Lahn wrote: >> I haven't read the descriptor protocol as yet. > > You should. You should also trim your quotations to the relevant > minimum, and post using your real name. > I don't take advice from people on USENET who DON'T have a long history of helping ME - unless

Re: Descriptors vs Property

Ian Kelly wrote: > On Fri, Mar 11, 2016 at 10:59 PM, Veek. M <vek.m1...@gmail.com> wrote: >> A property uses the @property decorator and has @foo.setter >> @foo.deleter. >> >> A descriptor follows the descriptor protocol and implements the >

Re: Descriptors vs Property

Veek. M wrote: > A property uses the @property decorator and has @foo.setter > @foo.deleter. > > A descriptor follows the descriptor protocol and implements the > __get__ __set__ __delete__ methods. > > But they both do essentially the same thing, allow us to do: > foo

Descriptors vs Property

A property uses the @property decorator and has @foo.setter @foo.deleter. A descriptor follows the descriptor protocol and implements the __get__ __set__ __delete__ methods. But they both do essentially the same thing, allow us to do: foo = 10 del foo x = foo So why do we have two ways of

Re: Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172

Ian Kelly wrote: > On Wed, Mar 9, 2016 at 2:14 AM, Veek. M <vek.m1...@gmail.com> wrote: >> what i wanted to know was, x = Client('192.168.0.1') will create an >> object 'x' with the IP inside it. When I do: >> pickle.dump(x) >> pickle doesn't know where in th

Re: Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172

dieter wrote: > "Veek. M" <vek.m1...@gmail.com> writes: > >> import socket >> class Client(object): >> def __init__(self,addr): >> self.server_addr = addr >> self.sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM) >> self.soc

Re: exec "x = 3; print x" in a - How does it work?

Steven D'Aprano wrote: > On Wednesday 09 March 2016 16:27, Veek. M wrote: > >> What is the return value of `exec`? Would that object be then used to >> iterate the sequence in 'a'? I'm reading this: >> https://www.python.org/download/releases/2.2.3/descrintro/ >

Re: exec "x = 3; print x" in a - How does it work?

Ben Finney wrote: > "Veek. M" <vek.m1...@gmail.com> writes: > >> What is the return value of `exec`? > > You can refer to the documentation for questions like that. > <URL:https://docs.python.org/3/library/functions.html#exec> > >> Wo

exec "x = 3; print x" in a - How does it work?

What is the return value of `exec`? Would that object be then used to iterate the sequence in 'a'? I'm reading this: https://www.python.org/download/releases/2.2.3/descrintro/ -- https://mail.python.org/mailman/listinfo/python-list

Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172

import socket class Client(object): def __init__(self,addr): self.server_addr = addr self.sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM) self.sock.connect(addr) def __getstate__(self): return self.server_addr def __setstate__(self,value): self.server_addr = value

Re: __del__: when to use it? What happens when you SystemExit/NameError wrt del? Method vs function calls.

Steven D'Aprano wrote: > On Monday 07 March 2016 17:13, Veek. M wrote: > >> import foo >> class Bar(object): >> def __del__(self, foo=foo): >> foo.bar()# Use something in module foo >> >> ### Why the foo=foo? import foo, would increment

Re: __del__: when to use it? What happens when you SystemExit/NameError wrt del? Method vs function calls.

Veek. M wrote: > 1. What are the rules for using __del__ besides: 'don't use it'. > > 2. What happens when I SystemExit? __del__ and gc are not invoked when > I SystemExit and there's a circular reference - but why? The OS is > going to reclaim the memory anyways so why be finicky

__del__: when to use it? What happens when you SystemExit/NameError wrt del? Method vs function calls.

1. What are the rules for using __del__ besides: 'don't use it'. 2. What happens when I SystemExit? __del__ and gc are not invoked when I SystemExit and there's a circular reference - but why? The OS is going to reclaim the memory anyways so why be finicky about circular references - why can't

Re: Lookahead while doing: for line in fh.readlines():

MRAB wrote: > On 2016-03-04 13:04, Veek. M wrote: >> Terry Reedy wrote: >> >>> On 2/27/2016 4:39 AM, Veek. M wrote: >>>> I want to do something like: >>>> >>>> #!/usr/bin/env python3 >>>> >>>> fh = open('/etc/motd

Re: Lookahead while doing: for line in fh.readlines():

Terry Reedy wrote: > On 2/27/2016 4:39 AM, Veek. M wrote: >> I want to do something like: >> >> #!/usr/bin/env python3 >> >> fh = open('/etc/motd') >> for line in fh.readlines(): >> print(fh.tell()) >> >> why doesn't this work as expe

Lookahead while doing: for line in fh.readlines():

I want to do something like: #!/usr/bin/env python3 fh = open('/etc/motd') for line in fh.readlines(): print(fh.tell()) why doesn't this work as expected.. fh.readlines() should return a generator object and fh.tell() ought to start at 0 first. Instead i get the final count repeated for

threading - Doug Hellman stdlib book, Timer() subclassing etc

In Doug Hellman's book on the stdlib, he does: import threading import logging logging.basicConfig(level=logging.DEBUG, format=’(%(threadName)-10s) %(message)s’, ) class MyThreadWithArgs(threading.Thread): def __init__(self, group=None, target=None, name=None, args=(),

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