Re: [Tutor] Problem with calling class methods stored in a list
Tobias M. wrote:
Am 10.01.2013 15:15, schrieb Peter Otten:
Of course handle_1_42() is not exactly the method name one would hope
for. You could, again, strive for simplicity and add a lookup table that
maps protocol tuples to function /names/ , but as simplicity doesn't seem
to be your cup of tea:
class HandlersType(type):
def __init__(cls, name, bases, classdict):
cls.lookup_protocol = lookup = {}
for k, v in classdict.items():
if isinstance(v, protocol_method):
lookup[v.protocol] = getattr(cls, k)
class protocol_method(classmethod):
pass
def protocol(x, y):
def attach_protocol(f):
f = protocol_method(f)
f.protocol = x, y
return f
return attach_protocol
class D:
__metaclass__ = HandlersType
@protocol(42, 17)
def foo(cls):
print Hi
D.lookup_protocol[42, 17]()
;)
In my eyes this is anything but simple.
Correct me if I'm wrong:
I already use a lookup table in my code, called method_list in my
first post. The advantage of your above code is that I don't need to
manually take care of the lookup table and extension by subclassing is
easier.
You are right; the misunderstanding is that I wasn't advertising the above
fancy solution (which is buggy, btw).
I have now implemented what I had in mind with the protocol to function name
mapping, and I think /that/ is reasonably complex. I'm using instance
methods in the demo, but it should work with class methods as well.
class Error(Exception):
def __init__(self, protocol):
Exception.__init__(self, self.template.format(protocol))
class UnknownProtocolError(Error):
template = Unknown protocol {}
class ProtocolNotSupportedError(Error):
template = Protocol {} not supported
FOO = (42, 17)
BAR = (1, 2)
BAZ = (3, 4)
HAM = (4, 5)
SPAM = (5, 6)
class HandlersBase(object):
protocol_to_methodname = {
FOO: foo,
BAR: bar,
BAZ: baz,
HAM: ham,
}
def get_handler(self, protocol):
try:
methodname = self.protocol_to_methodname[protocol]
except KeyError:
raise UnknownProtocolError(protocol)
method = getattr(self, methodname, None)
if method is None:
raise ProtocolNotSupportedError(protocol)
return method
class A(HandlersBase):
def foo(self): print A.foo
def bar(self): print A.bar
def baz(self): print A.baz
class B(A):
def bar(self): print B.bar
baz = None # hide parent implementation
if __name__ == __main__:
for Class in A, B:
inst = Class()
print ---, Class.__name__, ---
for protocol in FOO, BAR, BAZ, SPAM:
try:
inst.get_handler(protocol)()
except Error as err:
print err
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[Tutor] OT: brainf**k program
Not quite PEP8 compliant, but quite nifty:
http://www.cs.princeton.edu/~ynaamad/misc/bf.htm
The program below interprets the follwing string as Hello World:
++[+-]++.+.+++..+++.++.+++..+++.--..+..
(lambda t:(lambda a:(lambda b:(lambda
l,e,s:((lambda(Y,o,N,A,t),a,n:e('v',(Y,o,N,A,t))or[e('v',(lambda(Y,o,N,A,t):({'':(lambda(Y,o,N,A,t),a,n:(Y,o,N+1,A+1,t)),'':(lambda(Y,o,N,A,t),a,n:(Y,o,N-1,A+1,t)),'+':(lambda(Y,o,N,A,t),a,n:((Y[:N]+[Y[N]+1]+Y[N+1:],o,N,A+1,t)if
N=0
else(Y,o[:-N-1]+[o[-N-1]+1]+o[-N:],N,A+1,t))),'-':(lambda(Y,o,N,A,t),a,n:((Y[:N]+[Y[N]-1]+Y[N+1:],o,N,A+1,t)if
N=0
else(Y,o[:-N-1]+[o[-N-1]-1]+o[-N:],N,A+1,t))),'.':(lambda(Y,o,N,A,t),a,n:__import__('sys').stdout.write(chr(Y[N]
if N=0 else
o[-N-1]))or(Y,o,N,A+1,t)),',':(lambda(Y,o,N,A,t),a,n:(Y[:N]+[ord(t[0])if
len(t)else -1]+Y[N+1:]if A=0 else Y,o[:-N-1]+[ord(t[0])if len(t)else
-1]+o[-N:]if A0 else o,N,A+1,t[1:])),'[':(lambda(Y,o,N,A,t),a,n:(Y,o,N,n[A]+1
if(Y[N]==0 if N=0 else o[-N-1]==0)else
A+1,t)),']':(lambda(Y,o,N,A,t),a,n:(Y,o,N,n[A]+1 if(Y[N]=1 if N=0 else
o[-N-1]=1)else A+1,t))}[a[A]]((Y+[0]*(9+len(Y)) if A=len(Y)-5 else
Y,o+[0]*(9+len(o)) if -A=len(o)-5 else
o,N,A,t),a,n)if Alen(a)else False))(l('v')))for i in s.takewhile(lambda
x:l('v')!=False,s.count())])(([],[],0,0,t),a,dict(e('g',[])or
e('l',[])or[e('l',l('l')+[i])if
a[i]=='['else(e('g',l('g')+[(l('l')[-1],i),(i,l('l')[-1])])or
e('l',l('l')[:-1]))for i in range(len(a))if a[i] in'[]'][:0]or
l('g'[:0])(b.__getattribute__,b.__setattr__,__import__('itertools')))(lambda:a)or
None)(filter(.+[,-].count,open(__import__('sys').argv[1]).read((raw_input())
Regards,
Albert-Jan
~~
All right, but apart from the sanitation, the medicine, education, wine, public
order, irrigation, roads, a
fresh water system, and public health, what have the Romans ever done for us?
~~ ___
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[Tutor] Books for Learning Python
Hello all, I've began my journey into Python (2.7 currently) and I'm finding it a bit rough using the python.org tutorials. Although chalked full of information I find it a bit overwhelming. Can anyone recommend a book, or two, or three that would be great material for really learning the language. I tend to learn better with a little structure and I feel a good book would be the best approach for myself. Any advice would be greatly appreciated. --Thanks! ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Books for Learning Python
Not Books but have you tried any of the online learning courses? They're free and look very good from my equally beginner perspective as I struggle through them(allow more time than you think :[ ) www.coursera.org www.edx.org www.udacity.com all very good, take you pick! From: quent...@gmail.com Date: Fri, 11 Jan 2013 08:10:46 -0600 To: tutor@python.org Subject: [Tutor] Books for Learning Python Hello all, I've began my journey into Python (2.7 currently) and I'm finding it a bit rough using the python.org tutorials. Although chalked full of information I find it a bit overwhelming. Can anyone recommend a book, or two, or three that would be great material for really learning the language. I tend to learn better with a little structure and I feel a good book would be the best approach for myself. Any advice would be greatly appreciated. --Thanks! ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Books for Learning Python
There is also this - http://www.codecademy.com/#!/exercises/0 From: Tutor [mailto:tutor-bounces+xperimental22=gmail@python.org] On Behalf Of Chris Rogers Sent: Friday, January 11, 2013 9:11 AM To: tutor@python.org Subject: [Tutor] Books for Learning Python Hello all, I've began my journey into Python (2.7 currently) and I'm finding it a bit rough using the python.org tutorials. Although chalked full of information I find it a bit overwhelming. Can anyone recommend a book, or two, or three that would be great material for really learning the language. I tend to learn better with a little structure and I feel a good book would be the best approach for myself. Any advice would be greatly appreciated. --Thanks! ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Books for Learning Python
On 11/01/13 14:10, Chris Rogers wrote: Hello all, I've began my journey into Python (2.7 currently) and I'm finding it a bit rough using the python.org http://python.org tutorials. You don't tell us your starting point. Are you experienced in programming in other languages or is python your first foray into Programming? Are you a professional or hobbyist? Do you have a scientific or math background? All of these influence what makes a book suitable. Some of the tutorials listed on Python.org are also paper books (including mine). Which tutorials have you looked at? The official tutor is good for people who can already program. The non-programmes ones are better if you can't already program (as you'd expect!). There are also several python videos available on sites like showmedo.com If you can answer the above questions we might be able to recommend some books. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] help for a beginner
Hi, I am a beginner to progrmming and want to learn basic python. I am a scientist (with less math background) with absolutely no programming experience. Are there any web based tutorials/videos/books to learn python. Any help is deeply appreciated, thanks Murail -- Murali Dharan Bashyam, PhD, MNAScI Staff Scientist and Chief, Laboratory of Molecular Oncology, Centre for DNA Fingerprinting and Diagnostics (CDFD), Tuljaguda complex, Nampally, Hyderabad 51, INDIA Ph: 91-40-24749383 Fax: 91-40-24749448 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] help for a beginner
On Sat, Jan 12, 2013 at 12:28 AM, MDB bashya...@gmail.com wrote: Hi, I am a beginner to progrmming and want to learn basic python. I am a scientist (with less math background) with absolutely no programming experience. Are there any web based tutorials/videos/books to learn python. The best book for beginners in my experience is Python for Absolute Beginners, I liked it's approach in making learning a bit fun. A good online resource is http://www.alan-g.me.uk/ Any help is deeply appreciated, thanks Murail -- Murali Dharan Bashyam, PhD, MNAScI Staff Scientist and Chief, Laboratory of Molecular Oncology, Centre for DNA Fingerprinting and Diagnostics (CDFD), Tuljaguda complex, Nampally, Hyderabad 51, INDIA Ph: 91-40-24749383 Fax: 91-40-24749448 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor -- Vishwajeet Singh +91-9657702154 | dextrou...@gmail.com | http://bootstraptoday.com Twitter: http://twitter.com/vishwajeets | LinkedIn: http://www.linkedin.com/in/singhvishwajeet ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] help for a beginner
Murail, Check out Udacity.com and the CS101 course. Great video lectures reinforced by homework and problems (with answers) that you can do yourself. Also has a very good forum and active user base to ask questions. It is a good starting point for a beginner and teaches the basics behind how to build a simple web crawler using Python. Cheers, Graham On Fri, Jan 11, 2013 at 1:58 PM, MDB bashya...@gmail.com wrote: Hi, I am a beginner to progrmming and want to learn basic python. I am a scientist (with less math background) with absolutely no programming experience. Are there any web based tutorials/videos/books to learn python. Any help is deeply appreciated, thanks Murail -- Murali Dharan Bashyam, PhD, MNAScI Staff Scientist and Chief, Laboratory of Molecular Oncology, Centre for DNA Fingerprinting and Diagnostics (CDFD), Tuljaguda complex, Nampally, Hyderabad 51, INDIA Ph: 91-40-24749383 Fax: 91-40-24749448 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] garbage collection/class question
On 10.01.2013 19:50, Mitya Sirenef wrote: On 01/10/2013 09:06 AM, richard kappler wrote: class Tree(object): height = 0 def grow(self): self.height += 1 You may have a dozen of related functions and you can logically group them together by making them methods of a class, making it easier to think about and work on the logic of your program. Actually one question about those dozens of related instances generated by: greenwoodTree = Tree() oakTree = Tree() Both, greenwoodTree and oakTree, are derived from Tree class, thus receiving the features and also - if so - holding unique values created in there __init__ generator method - self.height, self.color and so forth uniquely each. But do both share the same function memory space from the class Tree? I am currently trying also to get my head wrapped around OOP in general, but not 100% sure so that derived instances use the same functions (also memory wise speaking) - or are there several definitions of grow ? The confusion came somehow when reading about classmethods and staticmethods and patterns like Singleton, monostate, borg... from which I understand only ensure that the self.height properties are shared across multiple instances of a given class? From what I tried out using id() and generating functions in a loop - the id(class.function) provided the same result when printed out, according to that: http://stackoverflow.com/questions/121396/accessing-object-memory-address So I assume the functions are shared across thus one decleration has been made in Tree class and all siblings are using that one? Thank you in advance for clarification. Jan ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Books for Learning Python
On Jan 11, 2013, at 1:39 PM, Alan Gauld alan.ga...@btinternet.com wrote: On 11/01/13 14:10, Chris Rogers wrote: Hello all, I've began my journey into Python (2.7 currently) and I'm finding it a bit rough using the python.org http://python.org tutorials. You don't tell us your starting point. Are you experienced in programming in other languages or is python your first foray into Programming? Are you a professional or hobbyist? Do you have a scientific or math background? All of these influence what makes a book suitable. Some of the tutorials listed on Python.org are also paper books (including mine). Which tutorials have you looked at? The official tutor is good for people who can already program. The non-programmes ones are better if you can't already program (as you'd expect!). There are also several python videos available on sites likeshowmedo.com If you can answer the above questions we might be able to recommend some books. I am also looking for some good resources for learning Python. Here is my background. I did a lot of programming in Fortran 77 while working on my Ph.D. in engineering mechanics (graduated in 1993). I did some simple programming in Matlab and Mathematica in the 90s, but all the coding for my research since then has been done by my graduate students. I want to get back into programming so that I can create applications and animate the motion of objects for undergraduate and graduate dynamics courses I teach. Friends tell me Python is a good choice for an object oriented language (about which I know almost nothing) that has a readable syntax. With this in mind, I have two questions: (1) Will Python allow me to create applications that provide a simple GUI interface to something like an integrator for ODEs? Does it have graphics libraries that allow one to animate the motion of simple objects (e.g., spheres, ellipsoids, parallelepipeds, etc.) based on the results of numerical simulations? (2) If the answers to the above questions are generally yes, where are some good places to get started learning Python to achieve my goals? Thank you. Gary L. Gray ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] garbage collection/class question
On 01/11/2013 02:41 PM, Jan Riechers wrote: On 10.01.2013 19:50, Mitya Sirenef wrote: On 01/10/2013 09:06 AM, richard kappler wrote: class Tree(object): height = 0 def grow(self): self.height += 1 You may have a dozen of related functions and you can logically group them together by making them methods of a class, making it easier to think about and work on the logic of your program. Actually one question about those dozens of related instances generated by: greenwoodTree = Tree() oakTree = Tree() Both, greenwoodTree and oakTree, are derived from Tree class, It's important that we use correct, or at least close terminology. A derived class is VERY different from an instance. greenWoodTree and oakTree are bound to different instances of Tree. thus receiving the features and also - if so - holding unique values created in there __init__ generator method __init__ is not a generator. it's simply a method. A method is a function that's defined inside a class - self.height, self.color and so forth uniquely each. We have to be careful here. Such data can be attributes of an instance, or they can be attributes of a class. Strangely enough, this example has a self.height and tree.height that are both called height, but technically distinct values. I think it's best if you avoid such things, and use unique names till you've got the fundamentals straight. But do both share the same function memory space from the class Tree? I wouldn't use the term function memory space, but I'll say this much. Unless you do something tricky, there is only one method Tree.grow, and all instances share that same method. No duplicated memory at all. I am currently trying also to get my head wrapped around OOP in general, but not 100% sure so that derived instances use the same functions (also memory wise speaking) - or are there several definitions of grow ? Not yet. Creating instances don't duplicate any methods. You'd have to do something explicit, and advanced. The confusion came somehow when reading about classmethods and staticmethods and patterns like Singleton, monostate, borg... from which I understand only ensure that the self.height properties are shared across multiple instances of a given class? I'd consider all of those as advanced techniques, and a complete confusion at your present stage. classmethods and staticmethods affect the parameters that a method gets, not whether data properties belong to the class or to the method. From what I tried out using id() and generating functions in a loop - the id(class.function) provided the same result when printed out, according to that: http://stackoverflow.com/questions/121396/accessing-object-memory-address So I assume the functions are shared across thus one decleration has been made in Tree class and all siblings are using that one? Without showing the code in this loop, I can't comment on what you observed. Don't have any idea what you mean by a sibling. The only meaning I can think of is that two classes each derived from a common base class can be considered siblings. But you don't do any deriving in this email. -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Binary/Decimal convertor
Hi, I made a program called binary/denary convertor. Can anyone tell me about
how I could stop the user entering a binary number with more than 8 numbers or
8 bit by repeating the question over and over until they do enter a correct
binary number( 8-bit or less)
Here is the code. I started off by entering 'len' function.
def add_binary_numbers(num1, num2):
return num1 + num2
num1 = int(input('please enter the first 8 bit binary number: '),2)
if len(num1) 8:
print(please enter an 8 bit binary number)
return int(num1,2)
num2 = int(input('please enter the second 8 bit binary number: '),2)
result = add_binary_numbers(num1, num2)
print('the result is', bin(result)[2:])
Thanks, Ghadir
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Re: [Tutor] Books for Learning Python
on line Python courses with labs google python the hard way udemy.com also has python courses https://developers.google.com/edu/python/ http://www.codecademy.com/tracks/python google free online python programming classes courses Len On Friday 11/01/2013 at 3:18 pm, Gary L. Gray wrote: On Jan 11, 2013, at 1:39 PM, Alan Gauld alan.ga...@btinternet.com wrote: On 11/01/13 14:10, Chris Rogers wrote: Hello all, I've began my journey into Python (2.7 currently) and I'm finding it a bit rough using the python.org http://python.org tutorials. You don't tell us your starting point. Are you experienced in programming in other languages or is python your first foray into Programming? Are you a professional or hobbyist? Do you have a scientific or math background? All of these influence what makes a book suitable. Some of the tutorials listed on Python.org are also paper books (including mine). Which tutorials have you looked at? The official tutor is good for people who can already program. The non-programmes ones are better if you can't already program (as you'd expect!). There are also several python videos available on sites likeshowmedo.com If you can answer the above questions we might be able to recommend some books. I am also looking for some good resources for learning Python. Here is my background. I did a lot of programming in Fortran 77 while working on my Ph.D. in engineering mechanics (graduated in 1993). I did some simple programming in Matlab and Mathematica in the 90s, but all the coding for my research since then has been done by my graduate students. I want to get back into programming so that I can create applications and animate the motion of objects for undergraduate and graduate dynamics courses I teach. Friends tell me Python is a good choice for an object oriented language (about which I know almost nothing) that has a readable syntax. With this in mind, I have two questions: (1) Will Python allow me to create applications that provide a simple GUI interface to something like an integrator for ODEs? Does it have graphics libraries that allow one to animate the motion of simple objects (e.g., spheres, ellipsoids, parallelepipeds, etc.) based on the results of numerical simulations? (2) If the answers to the above questions are generally yes, where are some good places to get started learning Python to achieve my goals? Thank you. Gary L. Gray ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Binary/Decimal convertor
* Ghadir Ghasemi ghasemm...@leedslearning.net [2013-01-11 21:51]:
Hi, I made a program called binary/denary convertor. Can anyone tell
me about how I could stop the user entering a binary number with more
than 8 numbers or 8 bit by repeating the question over and over until
they do enter a correct binary number( 8-bit or less) Here is the
code. I started off by entering 'len' function.
def add_binary_numbers(num1, num2):
return num1 + num2
num1 = int(input('please enter the first 8 bit binary number: '),2)
if len(num1) 8:
print(please enter an 8 bit binary number)
return int(num1,2)
num2 = int(input('please enter the second 8 bit binary number: '),2)
result = add_binary_numbers(num1, num2)
print('the result is', bin(result)[2:])
It looks like the first thing you need to do is figure out how to use a
loop (eg, while loop, for loop). I would recommend thinking about some
pseudocode to determine your program's flow and then try to build
something to accomplish that.
--
David Rock
da...@graniteweb.com
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Re: [Tutor] Binary/Decimal convertor
On 01/11/2013 04:51 PM, Ghadir Ghasemi wrote:
Hi, I made a program called binary/denary convertor. Can anyone tell me about
how I could stop the user entering a binary number with more than 8 numbers
or 8 bit by repeating the question over and over until they do enter a
correct binary number( 8-bit or less)
Here is the code. I started off by entering 'len' function.
def add_binary_numbers(num1, num2):
return num1 + num2
num1 = int(input('please enter the first 8 bit binary number: '),2)
if len(num1) 8:
print(please enter an 8 bit binary number)
return int(num1,2)
num2 = int(input('please enter the second 8 bit binary number: '),2)
result = add_binary_numbers(num1, num2)
print('the result is', bin(result)[2:])
1. Specify the Python version. I'll assume version 3.3
2. Show whatever error you got. I'd guess something like the following:
File stdin, line 1, in module
TypeError: object of type 'int' has no len()
The len() function operates on strings, lists, and other sequences and
mappings. But although you had a string at first, you've already
converted it to an int, which has no len() method. It might be simplest
to compare the value num to 0 and 255. Alternatively, you could compare
it before doing the int function.
Since you're doing it twice, it probably makes sense to do this in a
function. Write a function that repeatedly asks the user till it gets a
value in the right range.
The other error that jumps out is that you have a return statement at
top-level, while the statement only makes sense inside a function. That
problem goes away once you put the input logic inside a function.
--
DaveA
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Re: [Tutor] garbage collection/class question
On 11/01/13 19:41, Jan Riechers wrote: class Tree(object): height = 0 def grow(self): self.height += 1 Actually one question about those dozens of related instances generated by: greenwoodTree = Tree() oakTree = Tree() Both, greenwoodTree and oakTree, are derived from Tree class, Ok, a small terminology issue. They are not derived from Tree, they are Trees. They are two instances of the same class. Derived is used to suggest that they are sub classes of Tree via inheritance, a whole different discussion. receiving the features and also - if so - holding unique values created in there __init__ generator method - self.height, self.color and so forth uniquely each. But do both share the same function memory space from the class Tree? Yes. each instance holds a reference to its class. The class holds the function definitions. That's why you need a self parameter, it tells the class method definition which instance is being operated upon. I am currently trying also to get my head wrapped around OOP in general, but not 100% sure so that derived instances use the same functions (also memory wise speaking) - or are there several definitions of grow ? instances all refer to their class which holds the methods for the class. Where inheritance is concerned the class then holds a further reference to its parent class and Python looks for the earliest method definition as it traverses that class hierarchy. In other words if the object class doesn't have a method definition to match the message name then it looks in the superclass's definition for such a method, and if not there it looks in the superclass's superclass and so on until it finds a match. It is this search that makes methods different to simple functions. The confusion came somehow when reading about classmethods and staticmethods and patterns like Singleton, monostate, borg... from which I understand only ensure that the self.height properties are shared across multiple instances of a given class? Not quite. Class attributes are common across *all* instances of the class. Class methods are, like instance methods, stored in the class but do not need an instance to exist to call them. In fact class methods can be used as factories to create instances. This is a common pattern where you want a way to recover stored classes from a database or file or over a network connection. For example: foo = MYClass() # create a brand new instance in memory id = foo.store(DB) # save it in database del(foo) # get rid of the object in memory foo2 =- MYClass.restore(db, id)# new instance loaded from DB. bar = MYClass.load(someSocket) #instance read from network port store() is an instance method that stores the instance data in a database. restore() is a class method that resurrects that instance by loading it from the database load() is a class method that reads the data on a network port and interprets it as instance data and returns a new instance with those values.. From what I tried out using id() and generating functions in a loop - the id(class.function) provided the same result when printed out, Yes, because they are shared. But note that this is all implementation detail, there are other OOP languages that do things differently. Python's approach is the most common but not guaranteed. In fact I'm not even sure if it's guaranteed across different Python implementations! -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Working with output of a subprocess
Hello, Need some help with working with a text file. Is it possible to get the values associated with each of the parameter in the below text file format? For example: 1. How can I check what the Min and Max values are? 2. How to check the second column value associated with epoch2? Your help is greatly appreciated. I'm using Python 2.7 on Windows7. Examining file: 5521W231.txt Duration : 0h : 59m First meas : week : 86 : 1721 Last meas : week : 89 : 1721 Min val : 15 Max val : 18 3D : 3600 100.0% summary Total MissedRate epoch1:1378 0 0\1000 epoch2:2154 1 0\1000 Thanks, Tim ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Books for Learning Python
I did a lot of programming in Fortran 77 while working on my Ph.D. in engineering mechanics That's OK, it's not permanent damage. :-) (1) Will Python allow me to create applications that provide a simple GUI interface to something like an integrator for ODEs? No idea what an ODE is but yes Python can do simple graphics/GUIs. The Tkinter GUI library and friends are part of the standard library. Other tookits exist such as wxPython, pyGTK etc. Does it have graphics libraries that allow one to animate the motion of simple objects (e.g., spheres, ellipsoids, parallelepipeds, etc.) based on the results of numerical simulations? Yes, you can use things like gnuplot for grpahs/chartys or more dynamic you can use pyGame to define your own sprites and manoevre them around the screen. You can also access libraries such as Scipy and R for heavyweight number crunching. Start with the official tutorial, supplement with some of themore basic for new concepts like OOP (mine if you like! :-). Once confident with vanila python look at specialist tutorials for TKinter, PyGame, Scipy, R etc. Python is well suited to your needs, obnce you have the foundation in place (and that should take only 2 or 3 days effort to polish up the rusty bits) the new stuff can be learned as needed. HTH Alan g. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Books for Learning Python
On Fri, Jan 11, 2013 at 3:14 PM, Gary L. Gray g...@psu.edu wrote: On Jan 11, 2013, at 1:39 PM, Alan Gauld alan.ga...@btinternet.com wrote: (1) Will Python allow me to create applications that provide a simple GUI interface to something like an integrator for ODEs? Does it have graphics libraries that allow one to animate the motion of simple objects (e.g., spheres, ellipsoids, parallelepipeds, etc.) based on the results of numerical simulations? Ordinary Differential Equations, I'm assuming. Python has tons of math / sci libraries. Matplotlib, scipy, pylab etc. Under Windows, get Python(X,Y) and you will get an IDE, Python, and all the modules I've mentionned. A quick google, for those coming from a matlab background: http://www.christopheralbert.net/2011/03/equivalent-ode-integrators-in-matlab.html What OS will you be using? Francois -- www.pyptug.org - raspberry-python.blogspot.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Working with output of a subprocess
On 01/11/2013 05:29 PM, 3n2 Solutions wrote: Hello, Need some help with working with a text file. Is it possible to get the values associated with each of the parameter in the below text file format? For example: There are no intrinsic parameters and values in a text file. it's free form characters. On the other hand, if the format is a standard one, there may be a library that parses it for you. For example, configparser. On the other hand, if you have a spec, you can write a parser. Your example doesn't look like any standard, so we'd be guessing. 1. How can I check what the Min and Max values are? Assuming that the value of Min is val : 15 then you could get it by scanning through the file looking for the line that begins with the string Min ... if line.startswith(Min ): result = line[4:] 2. How to check the second column value associated with epoch2? Use the same approach to find the value of epoch2: Then split based on the colon, and then on whitespace. parts = line.split(:) subparts = parts[1].split() Your help is greatly appreciated. I'm using Python 2.7 on Windows7. Examining file: 5521W231.txt Duration : 0h : 59m First meas : week : 86 : 1721 Last meas : week : 89 : 1721 Min val : 15 Max val : 18 3D : 3600 100.0% summary Total MissedRate epoch1:1378 0 0\1000 epoch2:2154 1 0\1000 Thanks, Tim -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] pexports python27.dll python27.def (pygraphviz 1.1 package )
Actually the problem was the access permission for the destination folder. I changed to my account-specific path and it worked. Thanks Somnath On Fri, Jan 11, 2013 at 7:08 PM, Prasad, Ramit ramit.pra...@jpmorgan.comwrote: somnath chakrabarti wrote: I have mingw and python 2.7 in a Windows 7 box and trying to install PyGraphViz-1.1 using the following CLI utility python setup.py install build --compiler=mingw32 However, it ends up compiling error with undefined references as follows: ... build\temp.win-amd64-2.7\Release\pygraphviz\graphviz_wrap.o:graphviz_wrap.c:(.text+0x5a73): undefined reference to '_imp__PyInt_FromLong' collect2: ld returned 1 exit status error: command 'gcc' failed with exit status 1 I checked in the link (see here) which suggests exporting definitions from C:\Windows\System32\python27.dll to python27.def and then using dlltool to create libpython27.a and finally placing the libpython.a file under C:\Python27\libs of the Python distribution for MinGW to interpret Python libraries. I have the C:\MinGW\bin added to my system path and been trying to do the export using pexports C:\Windows\System32\python27.dll C:\Windows\System32\python27.def but each time I am receiving Access is Denied Message. I did some searching and found that MS Visual Studio users can avail another export option with DUMPBIN but since I don't have MSVS installed, I would like to get some alternative to get rid of the problem and need to use the PyGraphViz-1.1 package. Any suggestions will be very helpful Somnath Chakrabarti MS Student CSEE Department University of Maryland Baltimore County 1000 Hilltop Circle Baltimore, MD 21250 M: 443-812-5609 mail: chak...@umbc.edu gmail: chakrabarti.somn...@gmail.com Do you *need* to build PygraphViz? Seems like you can download binaries or just install from pypi. See: http://networkx.lanl.gov/pygraphviz/install.html Not sure you will have great luck here, as this list is about learning Python. You might have better luck in the Google Group [1], on the developer's site[2], or as a last resort the main Python mailing list. [1] http://groups.google.com/group/pygraphviz-discuss [2] http://networkx.lanl.gov/trac/wiki/PyGraphviz This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. -- Somnath Chakrabarti MS Student CSEE Department University of Maryland Baltimore County 1000 Hilltop Circle Baltimore, MD 21250 M: 443-812-5609 mail: chak...@umbc.edu gmail: chakrabarti.somn...@gmail.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] garbage collection/class question
On 01/11/2013 02:41 PM, Jan Riechers wrote: On 10.01.2013 19:50, Mitya Sirenef wrote: On 01/10/2013 09:06 AM, richard kappler wrote: class Tree(object): height = 0 def grow(self): self.height += 1 You may have a dozen of related functions and you can logically group them together by making them methods of a class, making it easier to think about and work on the logic of your program. Actually one question about those dozens of related instances generated by: greenwoodTree = Tree() oakTree = Tree() I just want to clarify, I meant you may have dozens of related functions and then move them all into a single class (i.e. I wasn't talking about instances, although you can of course have dozens of instances, too). So, let's say, you have: def f1(): .. def f2(): .. def f3(): .. And it occurs to you, since they're all related, it's good to have them all in the same class: class F(object): def f1(self): .. def f2(self): .. def f3(self): .. There are already really good answers so I'll just add a few notes below... Both, greenwoodTree and oakTree, are derived from Tree class, thus receiving the features and also - if so - holding unique values created in there __init__ generator method - self.height, self.color and so forth uniquely each. But do both share the same function memory space from the class Tree? I am currently trying also to get my head wrapped around OOP in general, but not 100% sure so that derived instances use the same functions (also memory wise speaking) - or are there several definitions of grow ? Functions are the same, (called methods), but the self object is different for each instance, and represents the instance. Consider that since the logic performed by the method is the same (if it wasn't, you'd define it as a separate method, right?), there would be no reason to make a separate method for each instance. As you know from working with functions, the same function may create different output if its arguments are different (from another call), but if the arguments are the same, it will create the same output (I'm ignoring things like random module). Well, that's why the first argument for a method is 'self', which is different for each instance. The confusion came somehow when reading about classmethods and staticmethods and patterns like Singleton, monostate, borg... from which I understand only ensure that the self.height properties are shared across multiple instances of a given class? The core idea of having a class and one or more instances is very versatile and powerful, all of the other concepts are much less needed especially as you're starting out. For example, you can have a class tree and methods and a bunch of tree instances; a classmethod would allow you to perform an action without making an instance first, but it's not like it's hard to make an instance -- it's just that in some cases it's clearer and more straightforward to use a classmethod, like Alan pointed out, but if you happen to forget about classmethods, you could easily get by without them. The same applies to Borg pattern, etc. Learn to be comfortable with classes and instances and you'll be able to make a wide range of programs. From what I tried out using id() and generating functions in a loop - the id(class.function) provided the same result when printed out, according to that: http://stackoverflow.com/questions/121396/accessing-object-memory-address So I assume the functions are shared across thus one decleration has been made in Tree class and all siblings are using that one? They are usually called methods if they belong to a class, and yes they're shared. HTH, - mitya -- Lark's Tongue Guide to Python: http://lightbird.net/larks/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] writing effective unittests
Japhy Bartlett wrote: TDD is a good principle but usually seems a little too pedantic for real world programming. Where tests (in my experience) get really useful is in making sure that a new change hasn't unexpectedly broken something already written. I would argue that TDD is a pedantic for non-real world (i.e. academic) programming and not at all for real world programming. In the academic world, manually testing is fine assuming sufficient manual testing (unless the professor is testing your testing). It was rare for me to use a project more than once or edit it enough that to find automated testing (TDD/unit) useful. Now group projects are a completely different story. Of course, this depends on your level of degree and subject matter. In the working world, testing is much more essential because money (yours or your company's) relies on the code being correct. ~Ramit This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] garbage collection/class question
On 01/11/2013 04:32 PM, Dave Angel wrote: On 01/11/2013 02:41 PM, Jan Riechers wrote: On 10.01.2013 19:50, Mitya Sirenef wrote: On 01/10/2013 09:06 AM, richard kappler wrote: class Tree(object): height = 0 def grow(self): self.height += 1 You may have a dozen of related functions and you can logically group them together by making them methods of a class, making it easier to think about and work on the logic of your program. Actually one question about those dozens of related instances generated by: greenwoodTree = Tree() oakTree = Tree() Both, greenwoodTree and oakTree, are derived from Tree class, It's important that we use correct, or at least close terminology. A derived class is VERY different from an instance. greenWoodTree and oakTree are bound to different instances of Tree. thus receiving the features and also - if so - holding unique values created in there __init__ generator method __init__ is not a generator. it's simply a method. A method is a function that's defined inside a class - self.height, self.color and so forth uniquely each. We have to be careful here. Such data can be attributes of an instance, or they can be attributes of a class. Strangely enough, this example has a self.height and tree.height that are both called height, but technically distinct values. I think it's best if you avoid such things, and use unique names till you've got the fundamentals straight. But do both share the same function memory space from the class Tree? I wouldn't use the term function memory space, but I'll say this much. Unless you do something tricky, there is only one method Tree.grow, and all instances share that same method. No duplicated memory at all. I am currently trying also to get my head wrapped around OOP in general, but not 100% sure so that derived instances use the same functions (also memory wise speaking) - or are there several definitions of grow ? Not yet. Creating instances don't duplicate any methods. You'd have to do something explicit, and advanced. The confusion came somehow when reading about classmethods and staticmethods and patterns like Singleton, monostate, borg... from which I understand only ensure that the self.height properties are shared across multiple instances of a given class? I'd consider all of those as advanced techniques, and a complete confusion at your present stage. classmethods and staticmethods affect the parameters that a method gets, not whether data properties belong to the class or to the method. From what I tried out using id() and generating functions in a loop - the id(class.function) provided the same result when printed out, according to that: http://stackoverflow.com/questions/121396/accessing-object-memory-address So I assume the functions are shared across thus one decleration has been made in Tree class and all siblings are using that one? Without showing the code in this loop, I can't comment on what you observed. Don't have any idea what you mean by a sibling. The only meaning I can think of is that two classes each derived from a common base class can be considered siblings. But you don't do any deriving in this email. I think it's very intuitive (at least, it was to me when I was learning), to view it as a common starting point for all instances. In this example it makes sense that all trees (or a general idea of a tree) starts with a 0 height, and then each particular tree ends up with a different height after a while. -m -- Lark's Tongue Guide to Python: http://lightbird.net/larks/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] run perl script files and capture results
eryksun wrote: [snip] 1. Using a forward slash in paths is OK for DOS/Windows system calls (e.g. opening a file or setting the cwd of a new process), dating back to the file system calls in MS-DOS 2.0 (1983). Otherwise a backslash is usually required (e.g. shell commands and paths in commandline arguments, where forward slash is typically used for options). In this case use a raw string or os.path.join. For a raw string, note that a trailing backslash is not allowed, e.g. r'C:\Python27\'. Instead you could use r'C:\Python27' '\\', among other options: http://docs.python.org/2/faq/design.html#why-can-t-raw-strings-r-strings-end-with-a-backslash Why not just use r'C:\Python27\\'? Might be too confusing for a beginner to remember, I suppose. ~Ramit This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] pexports python27.dll python27.def (pygraphviz 1.1 package )
somnath chakrabarti wrote: I have mingw and python 2.7 in a Windows 7 box and trying to install PyGraphViz-1.1 using the following CLI utility python setup.py install build --compiler=mingw32 However, it ends up compiling error with undefined references as follows: ... build\temp.win-amd64-2.7\Release\pygraphviz\graphviz_wrap.o:graphviz_wrap.c:(.text+0x5a73): undefined reference to '_imp__PyInt_FromLong' collect2: ld returned 1 exit status error: command 'gcc' failed with exit status 1 I checked in the link (see here) which suggests exporting definitions from C:\Windows\System32\python27.dll to python27.def and then using dlltool to create libpython27.a and finally placing the libpython.a file under C:\Python27\libs of the Python distribution for MinGW to interpret Python libraries. I have the C:\MinGW\bin added to my system path and been trying to do the export using pexports C:\Windows\System32\python27.dll C:\Windows\System32\python27.def but each time I am receiving Access is Denied Message. I did some searching and found that MS Visual Studio users can avail another export option with DUMPBIN but since I don't have MSVS installed, I would like to get some alternative to get rid of the problem and need to use the PyGraphViz-1.1 package. Any suggestions will be very helpful Somnath Chakrabarti MS Student CSEE Department University of Maryland Baltimore County 1000 Hilltop Circle Baltimore, MD 21250 M: 443-812-5609 mail: chak...@umbc.edu gmail: chakrabarti.somn...@gmail.com Do you *need* to build PygraphViz? Seems like you can download binaries or just install from pypi. See: http://networkx.lanl.gov/pygraphviz/install.html Not sure you will have great luck here, as this list is about learning Python. You might have better luck in the Google Group [1], on the developer's site[2], or as a last resort the main Python mailing list. [1] http://groups.google.com/group/pygraphviz-discuss [2] http://networkx.lanl.gov/trac/wiki/PyGraphviz This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] pexports python27.dll python27.def (pygraphviz 1.1 package )
somnath chakrabarti wrote: Actually I embedded a link to the refer site from where I have been following the procedure. I am new to Python too and have been following the book Mining the Social Web by Matthew Russell and thought Tutor mailing list would be the right place to post the question. Anyways will try to post in text and more python generic questions next time. Thanks for pointing out though! :) -Somnath And try and post in-line or after quoting relevant text (and trimming irrelevant text). Thanks! ~Ramit This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Binary/Decimal convertor
On 11/01/13 21:51, Ghadir Ghasemi wrote:
Hi, I made a program called binary/denary convertor.
Can anyone tell me about how I could stop the user entering a binary
number with more than 8 numbers or 8 bit
Why would you want to? Your code can handle much bigger binary numbers,
why limit the user to 8 bits?
Here is the code. I started off by entering 'len' function.
num1 = int(input('please enter the first 8 bit binary number: '),2)
Here hyou read the number as a string and already convert it to a real
number in Python. So the conversion from binary has already happened
regardless of how long the string was.
if len(num1) 8:
print(please enter an 8 bit binary number)
You now try to see how long the number is, but numvers don;t have a length.
So to do what you claim you want you need to do the len() check before
you do the inty() conversion.
Something like:
num1 = input('please enter the first 8 bit binary number: ')
if len(num1) 8:
print(please enter an 8 bit binary number)
else:
num = int(num,2)
Then put that in while a loop that repeats until the length is =8
return int(num1,2)
And here you return which would terminate your function except you don't
have a function so it will give a syntax error. And trying to convert a
num as a binary won't work because its already stored internally as a
binary number. This only works if you still have the string as described
above.
num2 = int(input('please enter the second 8 bit binary number: '),2)
And this doesn't do any len() checks
result = add_binary_numbers(num1, num2)
print('the result is', bin(result)[2:])
I'd suggest that you make your add_binary_numbers() function return
the binary string. Otherwise it doesn't add any value over the
standard plus sign...
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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Re: [Tutor] Working with output of a subprocess
On 11/01/13 22:29, 3n2 Solutions wrote:
Need some help with working with a text file.
Is it possible to get the values associated with each of the parameter
in the below text file format? For example:
Yes, but it's non trivial. You need to parse the text.
1. How can I check what the Min and Max values are?
2. How to check the second column value associated with epoch2?
In both cases you can extract the line using the startswith() string
method. You can then use a combination of split() and strip(), lstrip()
and rstrip() and slicing to extract the substrings you need.
Then convert the strings to numbers as necessary.
I'd probably write value extraction functions for each required
parameter, given a line of input. Then iterate over the text and all the
appropriate function based on the startswith() result:
for line in open('myfile.txt'):
if line.startswith('Min'): min = getSingleNumber(line)
elif line startswith('Max'): max = getSingleNumber(line)
elif
elif line.startswith('epoch2'): epoch2 = getCol2(line)
HTH
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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[Tutor] a Pygtk question sort of
Before anybody jumps me about this question being inappropriate for this
list, yes, I know it probably is BUT, the two places where it might be
appropriate are down pretty hard, so this is my only option (I think).
The question is in regards to pygtk I think, and pocketsphinx obliquely.
Appended below is code from the CMU Sphinx website that I wish to ever so
slightly modify, but am not quite sure how to proceed. This code creates a
gui with a button that stops and starts the pocketsphinx speech recognition
engine. When the button reads speak and you push it, the button goes
blank iirc, pocketsphinx listens, performs speech recognition and sends the
resulting text to the gui, changing the button text back to speak and
putting the pocketsphinx engine ostensibly (though not in actuality) on
pause.
I understand how the below code does all of this, including how
pocketsphinx works. Here's the issue: I want to use this code or code like
it (pocketsphinx can be imported and run directly in python but apparently
only to decode wav files, not as a real-time decoder unless you run it
through gst as shown in the appended code as I understand it) in my bot
program, so I don't need the gui, button or any of that. I need
pocketsphinx to work exactly as below, but send the text output back to the
main program or to a different program (chatbot) instead of the gui. Make
sense? I've been pouring over this code off and on for months as I've been
learning, and it's not quite as simple as dump the gui method and the
button. The problem is the button controls the vader (determines begin and
end of utterances) as well. Detailed explanation here:
http://cmusphinx.sourceforge.net/wiki/gstreamer
So can anyone give me some guidance here or point me towards a place to
discuss this? The forums at Python.org are under construction, the
CMUSphinx forums at Sourceforge are down (404) so I'm not quite sure where
to go for help.
regards, Richard
#!/usr/bin/env python
# Copyright (c) 2008 Carnegie Mellon University.
#
# You may modify and redistribute this file under the same terms as
# the CMU Sphinx system. See
# http://cmusphinx.sourceforge.net/html/LICENSE for more information.
import pygtk
pygtk.require('2.0')
import gtk
import gobject
import pygst
pygst.require('0.10')
gobject.threads_init()
import gst
class DemoApp(object):
GStreamer/PocketSphinx Demo Application
def __init__(self):
Initialize a DemoApp object
self.init_gui()
self.init_gst()
def init_gui(self):
Initialize the GUI components
self.window = gtk.Window()
self.window.connect(delete-event, gtk.main_quit)
self.window.set_default_size(400,200)
self.window.set_border_width(10)
vbox = gtk.VBox()
self.textbuf = gtk.TextBuffer()
self.text = gtk.TextView(self.textbuf)
self.text.set_wrap_mode(gtk.WRAP_WORD)
vbox.pack_start(self.text)
self.button = gtk.ToggleButton(Speak)
self.button.connect('clicked', self.button_clicked)
vbox.pack_start(self.button, False, False, 5)
self.window.add(vbox)
self.window.show_all()
def init_gst(self):
Initialize the speech components
self.pipeline = gst.parse_launch('gconfaudiosrc ! audioconvert
! audioresample '
+ '! vader name=vad
auto-threshold=true '
+ '! pocketsphinx name=asr ! fakesink')
asr = self.pipeline.get_by_name('asr')
asr.connect('partial_result', self.asr_partial_result)
asr.connect('result', self.asr_result)
asr.set_property('configured', True)
bus = self.pipeline.get_bus()
bus.add_signal_watch()
bus.connect('message::application', self.application_message)
self.pipeline.set_state(gst.STATE_PAUSED)
def asr_partial_result(self, asr, text, uttid):
Forward partial result signals on the bus to the main thread.
struct = gst.Structure('partial_result')
struct.set_value('hyp', text)
struct.set_value('uttid', uttid)
asr.post_message(gst.message_new_application(asr, struct))
def asr_result(self, asr, text, uttid):
Forward result signals on the bus to the main thread.
struct = gst.Structure('result')
struct.set_value('hyp', text)
struct.set_value('uttid', uttid)
asr.post_message(gst.message_new_application(asr, struct))
def application_message(self, bus, msg):
Receive application messages from the bus.
msgtype = msg.structure.get_name()
if msgtype == 'partial_result':
self.partial_result(msg.structure['hyp'], msg.structure['uttid'])
elif msgtype == 'result':
self.final_result(msg.structure['hyp'], msg.structure['uttid'])
self.pipeline.set_state(gst.STATE_PAUSED)
self.button.set_active(False)
def partial_result(self, hyp, uttid):
Re: [Tutor] a Pygtk question sort of
On 12/01/13 01:18, richard kappler wrote: Before anybody jumps me about this question being inappropriate for this list, yes, I know it probably is BUT, the two places where it might be appropriate are down pretty hard, so this is my only option (I think). I'm not sure what you mean by down pretty hard but this definitely looks like a question for a pocketsphinx forum... I want to use this code or code like it in my bot program, so I don't need the gui, button or any of that. I need pocketsphinx to work exactly as below, but send the text output back to the main program or to a different program (chatbot) instead of the gui. Make sense? Sadly no. Can you explain exactly how you intend running pocketspinx? What is the main program? A Python script? Or some other external program? Where does chatbot fit in? Is it just an arbitrary example or is there some specific symbiosis going on? gui method and the button. The problem is the button controls the vader (determines begin and end of utterances) as well. Detailed explanation Nope, you lost me again... So can anyone give me some guidance here or point me towards a place to discuss this? The forums at Python.org are under construction, the CMUSphinx forums at Sourceforge are down (404) so I'm not quite sure where to go for help. Googling pocketsphinx python threw up at least half a dozen useful looking links You could also try the main python mailing list (or its mirror on the comp.lang.python newsgroup) -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] run perl script files and capture results
On 01/11/2013 07:33 PM, Prasad, Ramit wrote: [snip] Why not just use r'C:\Python27\\'? Might be too confusing for a beginner to remember, I suppose. Because that'd have two trailing backslashes. (in Python 2.7 anyway) -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Is a link broken?
I'm still working through Chun's Core Python Applications. I got the
web crawler (Example 9-2) working after I found a ':' typing error. Now
I'm trying to convert that to a program that checks for broken links.
This is not in the book. The problem I'm having now is knowing whether
a link is working.
I've written an example that I hope illustrates my problem:
#!/usr/bin/env python
import urllib2
sites = ('http://www.catb.org', 'http://ons-sa.org', 'www.notasite.org')
for site in sites:
try:
page = urllib2.urlopen(site)
print page.geturl(), didn't return error on open
print 'Reported server is', page.info()['Server']
except:
print site, 'generated an error on open'
try:
page.close()
print site, 'successfully closed'
except:
print site, 'generated error on close'
Site 1 is alive, the other two dead. Yet this code only returns an
error on site three. Notice that I checked for a redirection (I think)
of the site if it opened, and that didn't help with site two.
Is there an unambiguous way to determine if a link has died -- knowing
nothing about the link in advance?
Ed
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