unexpected behavior: did i create a pointer?

[gu]

hi to all!
after two days debugging my code, i've come to the point that the 
problem was caused by an unexpected behaviour of python. or by lack of 
some information about the program, of course! i've stripped down the 
code to reproduce the problem:


a = {}

for x in range(10):
 for y in range(10):
 a[x,y] = "0"

copyOfA = a

def functionA(x,y):
 print a[x,y],
 copyOfA[x,y] = "*"
 print a[x,y],copyOfA[x,y]


for x in range(10):
 for y in range(10):
 functionA(x,y)




now, in the second "for" cycle and in functionA() i only 'touch' copyOfA 
(altering it). as i don't touch the variable "a", i expect it not to be 
affected by any change, but copyOfA acts like a pointer to a and 
altering copyOfA's values result in altering the values of "a", so the 
result that i expect is:
0 0 *
0 0 *
0 0 *
0 0 *
[..]

but i get:
0 * *
0 * *
0 * *
0 * *
[..]

what's going on?
thanks in advance.
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Class behaving like a static class

[gu]

Hi to all,
i have a module (a single .py file, actually), with a class called 
HashedDir.


when i import the file and instanciate 2 instances of that class, when i 
check the object's fields they're always the same, even if the two 
objects should be different.


Eg:

h1 = HashedDir('someValue')
print h1.value # someValue
h2 = HashedDir('someOtherValue')
print h1.value # someOtherValue
print h2.value # someOtherValue

Any idea?
Thanks in advance
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Line completion with custom commands

[gu]

Hi, my Python program can be launched with a range of different options 
(or subcommands) like:


$ myProgram doSomething
$ myProgram doSomethingElse
$ myProgram nowDoSomethingDifferent

I want it to use auto-completion with so that if i type "myProgram d" it 
returns "myProgram doSomething" and if i type "myProgram n" it renders 
"myProgram nowDoSomethingDifferent". This is similar to the average use 
of the module rlcompleter, but it does not pick possible completion 
options from the filesystem (or from history) but from a custom set of 
strings (that correspond to the available options for my program)


Any idea on how to implement this?

I'm aware of the variable PYTHONSTARTUP (that should point to a file I 
don't know how to write).


As a working example, django-admin (from the django package) has the 
same exact feature i'm looking for

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Re: Line completion with custom commands

[gu]

Steve Holden wrote:

gu wrote:

Hi, my Python program can be launched with a range of different options
(or subcommands) like:

$ myProgram doSomething
$ myProgram doSomethingElse
$ myProgram nowDoSomethingDifferent

I want it to use auto-completion with so that if i type "myProgram d" it
returns "myProgram doSomething" and if i type "myProgram n" it renders
"myProgram nowDoSomethingDifferent". This is similar to the average use
of the module rlcompleter, but it does not pick possible completion
options from the filesystem (or from history) but from a custom set of
strings (that correspond to the available options for my program)

Any idea on how to implement this?

I'm aware of the variable PYTHONSTARTUP (that should point to a file I
don't know how to write).

As a working example, django-admin (from the django package) has the
same exact feature i'm looking for


The issue here is that Python doesn't get control until afer you've hit
RETURN on the command line. so nothing you can do in your program or
interpreter setup will have any effect on how the command shell behaves.

regards
 Steve


I see, but how does django-admin work, then?

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Re: Line completion with custom commands

[gu]

Marco Mariani wrote:

gu wrote:


I see, but how does django-admin work, then?


from bash:

complete -W "doSomething doSomethingElse doSomethingDifferent" myProgram


This worked like a charm, thank you so much. Is this available for bash 
only or any shell?

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