Nitin Das nitin@gmail.com wrote
class mymut(object):
def __setattr__(self,k,v):
if hasattr(self,k):
if self.__dict__.get(k) == None:
self.__dict__[k] = v
Do you need to look up the dict?
Surely you could just use
if self.k is None
self.k = v
which
Hello,
I follow the online book How to think like a computer scientist.
But now I have a problem with a exercise.
This is not homework.
The exercise is :
Using a text editor, create a Python script named tryme3.py . Write a function
in this file called nine_lines that uses
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On Thu, 19 Aug 2010 01:24:11 pm Nitin Das wrote:
Hello,
Can somebody help me how to make immutable objects in python. I
have seen overriding the __new__, __setattr__ methods.. but not
comfortable with how to use them to make the object immutable.
thanks in advance
--nitin
I have
Can you copy and paste the exact error message you receive in the traceback
when you run your program. Also, copy the complete program here since it is
only a handful of lines
On Thu, Aug 19, 2010 at 7:31 AM, Roelof Wobben rwob...@hotmail.com wrote:
Hello,
I follow the online book How to
Nitin Das wrote:
class mymut(object):
def __setattr__(self,k,v):
if hasattr(self,k):
if self.__dict__.get(k) == None:
self.__dict__[k] = v
else:
raise TypeError(Cant Modify Attribute Value)
else:
raise
Hello,
I don't see a traceback only this output.
regel 1
regel 2
script terminated.
And the code I gave you was the whole code because Im still working on this one.
I have learned to do one problem at the time so in mu opion first make the part
which prints out 3 lines
Peter Otten wrote:
Nitin Das wrote:
class mymut(object):
def __setattr__(self,k,v):
if hasattr(self,k):
if self.__dict__.get(k) == None:
self.__dict__[k] = v
else:
raise TypeError(Cant Modify Attribute Value)
else:
Roelof Wobben rwob...@hotmail.com wrote
I don't see a traceback only this output.
That looks about right to me, what did you expect to see that was
different?
regel 1
regel 2
script terminated.
=
I have learned to do one problem at
Hello All,
Please guide with the syntax.
All beginners tutorials on the web teach the syntax of python.. I am
unsure what your questions is.
My bad with code.
below is the existing program with Formula A (Mean). Formula B will be
Extrapolation,
also I have not been able to do
Thanks guys,
NamedTuple implementation is preety nice solution.
--nitin
On Thu, Aug 19, 2010 at 6:28 PM, Peter Otten __pete...@web.de wrote:
Peter Otten wrote:
Nitin Das wrote:
class mymut(object):
def __setattr__(self,k,v):
if hasattr(self,k):
if
Hi,
I've been reading up on list comprehensions lately, all userful and powerful
stuff - trying to wrap my brain around it :)
As the examples all seem to relate to lists, I was wondering if there is an
elegant similar way to apply a function to all keys in a dictionary?
(without looping over
Pete wrote:
Hi,
I've been reading up on list comprehensions lately, all userful and
powerful stuff - trying to wrap my brain around it :)
As the examples all seem to relate to lists, I was wondering if there is
an elegant similar way to apply a function to all keys in a dictionary?
On Thu, Aug 19, 2010 at 10:02 AM, Vince Spicer vi...@vinces.ca wrote:
Hey you can use list comprehension here
age_dict = { 'pete': 42, 'ann': 25, 'carl': 30, 'amanda': 64 }
you can create a dict from a list of tuples and you can access the dict as
a
list of tuples by accessing its items
On Thu, Aug 19, 2010 at 8:21 PM, Pete pkoe...@xs4all.nl wrote:
Hi,
I've been reading up on list comprehensions lately, all userful and
powerful stuff - trying to wrap my brain around it :)
As the examples all seem to relate to lists, I was wondering if there is an
elegant similar way to
On Fri, 20 Aug 2010 01:40:54 am Wayne Werner wrote:
age_dict = dict([(key.upper(), value) for key,value in
age_dict.items()])
This is a bad place to use a list comprehension. This will create a
list of values first and then create a dict from that list, so now
you have a list floating
(You top-posted, so now I have to delete the older part)
Vince Spicer wrote:
Hey you can use list comprehension here
age_dict = { 'pete': 42, 'ann': 25, 'carl': 30, 'amanda': 64 }
you can create a dict from a list of tuples and you can access the dict as
a
list of tuples by accessing its
Hello,
I have this exercise:
Now write the function is_odd(n) that returns True when n is odd and False
otherwise. Include doctests for this function as you write it.
Finally, modify it so that it uses a call to is_even to determine if its
argument is an odd integer.
So I thought
On Thu, Aug 19, 2010 at 3:01 PM, Roelof Wobben rwob...@hotmail.com wrote:
Hello,
I have this exercise:
Now write the function is_odd(n) that returns True when n is odd and
Falseotherwise. Include doctests for this function as you write it.
Finally, modify it so that it uses a call to
On Thu, Aug 19, 2010 at 2:01 PM, Roelof Wobben rwob...@hotmail.com wrote:
snip
def is_odd(argument):
uitkomst=is_even(argument)
return uitkomst
even=is_odd(1) ;
if even==True :
print Even getal
if even==False:
print Oneven getal
But now I get this error message :
return
On 8/19/10, Roelof Wobben rwob...@hotmail.com wrote:
Hello,
I have this exercise:
Now write the function is_odd(n) that returns True when n is odd and False
otherwise. Include doctests for this function as you write it.
Finally, modify it so that it uses a call to is_even to determine
Roelof Wobben wrote:
snip
def is_odd(argument):
uitkomst=is_even(argument)
return uitkomst
snip
You forgot to indent the return statement to match the other
statement(s) in the function.
DaveA
___
Tutor maillist -
On 8/19/2010 7:51 AM Pete said...
Hi,
I've been reading up on list comprehensions lately, all userful and powerful
stuff - trying to wrap my brain around it :)
As the examples all seem to relate to lists, I was wondering if there is an
elegant similar way to apply a function to all keys in a
On 2010-08-19, at 5:25 PM, Emile van Sebille wrote:
On 8/19/2010 7:51 AM Pete said...
Hi,
I've been reading up on list comprehensions lately, all userful and powerful
stuff - trying to wrap my brain around it :)
As the examples all seem to relate to lists, I was wondering if there is an
On Fri, 20 Aug 2010 09:51:08 am Pete wrote:
[...]
Ah, so list comprehensions are a purely syntactic construct?
No, I don't think that's what Emile was trying to say. It's not like
list comps are macros that are expanded into the explicit for-loop like
that. All he is saying is that both the
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