Re: newbie problem with str.replace

On Aug 4, 9:10 am, BobAalsma wrote: >                         # >                         bestandsnaam_nieuw = bestandsnaam >                         bestandsnaam_nieuw.replace(KLANTNAAM_OUT,KLANTNAAM_IN) The replace method does not modify the string (strings are immutable). You need to use the

Re: A silly question on file opening

On Feb 10, 3:42 pm, joy99 wrote: > Dear Group, > [snip] > I tried to change the location to D:\file and as I saw in Python Docs > the file reading option is now "r+" so I changed the statement to >    file_open=open("D:\file","r+") > but it is still giving error. Only use "r+" if you need to also

Re: Need debugging knowhow for my creeping Unicodephobia

On Feb 10, 2:09 pm, kj wrote: > Some people have mathphobia.  I'm developing a wicked case of > Unicodephobia. > [snip] Some general advice (Looks like I am reiterating what MRAB said -- I type slower :): 1. If possible, use unicode strings for everything. That is, don't use both str and unicod

Re: interaction of mode 'r+', file.write(), and file.tell(): a bug or undefined behavior?

On Jan 28, 7:12 am, Lie Ryan wrote: > In the code: > > """ > f = open('input.txt', 'r+') > for line in f: >     s = line.replace('python', 'PYTHON') >     # f.tell() >     f.write(s) > """ > [snip] My guess is that there are a few possible problems: 1) In this case, writing to file opened with '

Re: Python OOP Problem

On Dec 28, 7:29 am, "Martin v. Loewis" wrote: > > In this case (you just started to learn Python), I recommend to take > an explicit approach. Create a dictionary that maps class names to > classes: > > name2class = { "MyObject" : MyObject, >                "MyOtherObject" : MyOtherObject, >      

Re: Windows file paths, again

On Oct 21, 3:20 pm, Dan Guido wrote: > Hi Diez, > > The source of the string literals is ConfigParser, so I can't just > mark them with an 'r'. > > config = ConfigParser.RawConfigParser() > config.read(filename) > crazyfilepath = config.get(name, "ImagePath") > normalfilepath = normalize_path(craz

Re: set using alternative hash function?

On Oct 16, 12:24 pm, Ethan Furman wrote: > [snip] > As for what you want:  No, it's not currently possible.  If it's so big > a deal that the various methods presented don't meet with your approval, > break out the C and write your own.  Then you could give that back to > the community instead of

Re: set using alternative hash function?

On Oct 15, 1:49 pm, Ethan Furman wrote: > I'm still not sure I understand your concern about the values in a set, > though.  Sets keep the first object of a given key, dicts keep the last > object of a given key; in both cases, all other objects with the same > key are lost. > > So is that the beh

Re: set using alternative hash function?

On Oct 15, 12:11 pm, Austin Bingham wrote: > To put it in code, I want this: > >   s = set(hash_func = lambda obj: hash(obj.name), eq_func = ...) >   ... >   x.name = 'foo' >   y.name = 'foo' >   s.add(x) >   s.add(y) # no-op because of uniqueness criteria >   assert len(s) == 1 I wrote a quick s

Re: set using alternative hash function?

On Oct 15, 10:42 am, Austin Bingham wrote: > On Thu, Oct 15, 2009 at 4:06 PM, Anthony Tolle > To reiterate, dict only gets > me part of what I want. Whereas a set > with uniqueness defined over 'obj.name' would guarantee no name > collisions, dict only sorta helps me

Re: set using alternative hash function?

On Oct 15, 7:24 am, Austin Bingham wrote: > [snip] I'd like to create a set of these > objects where the hashing is done on these names. [snip] Why not use a dict? The key would be the object name. Pretty much the same behavior as a set (via the key), and you can still easily iterate over the o

Re: Move dictionary from instance to class level

To take things one step further, I would recommend using decorators to allow symbolic association of functions with the message identifiers, as follows: == (MESSAGE_ONE ,MESSAGE_TWO ,MESSAGE_THREE ) = xrange(3) class MyClass(object): method_dict = {}

Re: Help understanding the decisions *behind* python?

On Jul 20, 12:27 pm, Phillip B Oldham wrote: > ... > Specifically the "differences" between lists and tuples have us > confused and have caused many "discussions" in the office. We > understand that lists are mutable and tuples are not, but we're a > little lost as to why the two were kept separat

Re: missing 'xor' Boolean operator

On Jul 15, 8:32 pm, Paul Rubin wrote: > Among other things, that uses quadratic time!  Why do you want to keep > popping items from that list instead of iterating through it anyway? > > Anyway, I think you wrote something close to this: > ... Very true! I didn't thi

Re: missing 'xor' Boolean operator

On Jul 14, 2:25 pm, "Dr. Phillip M. Feldman" wrote: > Current Boolean operators are 'and', 'or', and 'not'.  It would be nice to > have an 'xor' operator as well. My $0.02 on this discussion: There would be nothing gained by having non-bitwise XOR operator. You can't short-circuit XOR, because y

Re: why cannot assign to function call

On Dec 29, 1:01 am, scsoce wrote: > I have a function return a reference, and want to assign to the > reference, simply like this: >  >>def f(a) >           return a >      b = 0 >     * f( b ) = 1* > but the last line will be refused as "can't assign to function call". > In my thought , the assig

Re: How to read stdout from subprocess as it is being produced

On Dec 19, 9:34 am, Alex wrote: > Hi, > > I have a Pyhon GUI application that launches subprocess. > I would like to read the subprocess' stdout as it is being produced > (show it in GUI), without hanging the GUI. > > I guess threading will solve the no-hanging issue, but as far as I > searched fo

Re: Guido's new method definition idea

def createfunc(self, arg): def self.func(arg): return arg + 1 - Anthony Tolle -- http://mail.python.org/mailman/listinfo/python-list

Re: Guido's new method definition idea

On Dec 6, 4:15 pm, Carl Banks <[EMAIL PROTECTED]> wrote: > On Dec 6, 12:47 am, "Patrick Mullen" <[EMAIL PROTECTED]> wrote: > > > Could I do something like this: > > > def a.add(b): return a+b > > > Outside of a class?  Of course then that makes you think you could do > > 5.add(6) or something craaa

Re: Guido's new method definition idea

On Dec 6, 4:15 pm, Carl Banks <[EMAIL PROTECTED]> wrote: > On Dec 6, 12:47 am, "Patrick Mullen" <[EMAIL PROTECTED]> wrote: > > > Could I do something like this: > > > def a.add(b): return a+b > > > Outside of a class?  Of course then that makes you think you could do > > 5.add(6) or something craaa