Re: Django python fuction

[hito koto]

hi, François :
Thanks

2014年6月11日水曜日 1時22分04秒 UTC+9 François Schiettecatte:
>
> Wouldn't the deep copy module handle this for you: 
>
> https://docs.python.org/2/library/copy.html 
>
> François 
>
> On Jun 10, 2014, at 12:17 PM, hito koto > 
> wrote: 
>
> > Hi,  Qiancong : 
> > 
> > I was looking for exactly this、 
> > Thank you ver much! 
> > 
> > 
> > 2014年6月10日火曜日 23時35分52秒 UTC+9 Qiancong: 
> >  
> > Hi, hito koto: 
> > I think you want to deep copy the list. The following code maybe 
>  helpful: 
> > def dcopy(obj): 
> > if not isinstance(obj, list): 
> > return obj 
> > return [dcopy(x) for x in obj] 
> >   
> > But this function only deep copy for list.  You can change code as what 
> I did for dic, set, tuple , etc .. 
> > moqia...@gmail.com 
> >   
> > From: François Schiettecatte 
> > Date: 2014-06-10 22:07 
> > To: django-users 
> > Subject: Re: Django python fuction 
> > You need to use .append() to add elements to a list, I suggest you take 
> a look at the python tutorial: 
> >   
> > https://docs.python.org/2/tutorial/ 
> >   
> > Not quite sure what you are doing with i or elem either. 
> >   
> > François 
> >   
> > On Jun 10, 2014, at 10:01 AM, hito koto  wrote: 
> >   
> > > So, I also have errors: 
> > > 
> > > 
> > > >>> def foo(x): 
> > > ... myList = [] 
> > > ... if isinstance(x, list): 
> > > ... for i in x: 
> > > ... elem = i 
> > > ... return myList + foo(elem) 
> > > ... else: 
> > > ... return 1 
> > > ... 
> > > >>> 
> > > >>> foo(a) 
> > > Traceback (most recent call last): 
> > >   File "", line 1, in  
> > >   File "", line 6, in foo 
> > >   File "", line 6, in foo 
> > > TypeError: can only concatenate list (not "int") to list 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 2014年6月10日火曜日 22時53分28秒 UTC+9 François Schiettecatte: 
> > > You are redefining 'list' on  line 2, rename list to myList as 
> follows: 
> > > 
> > > def foo(x): 
> > > myList = [] 
> > > if isinstance(x, list): 
> > > for i in x: 
> > > elem = i 
> > > return myList + foo(i) 
> > > else: 
> > > return 1 
> > > 
> > > And take this to a python list, this is for django. 
> > > 
> > > Cheers 
> > > 
> > > François 
> > > 
> > > 
> > > On Jun 10, 2014, at 9:43 AM, hito koto  wrote: 
> > > 
> > > > hi, 
> > > > 
> > > > I have this erroes: 
> > > > 
> > > > >>> def foo(x): 
> > > > ... list = [] 
> > > > ... if isinstance(x, list): 
> > > > ... for i in x: 
> > > > ... elem = i 
> > > > ... return list + foo(i) 
> > > > ... else: 
> > > > ... return 1 
> > > > ... 
> > > > >>> foo(a) 
> > > > Traceback (most recent call last): 
> > > >   File "", line 1, in  
> > > >   File "", line 3, in foo 
> > > > TypeError: isinstance() arg 2 must be a class, type, or tuple of 
> classes and types 
> > > > 
> > > > 
> > > > 
> > > > 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell: 
> > > > In general, I recommend adding the line "import pdb;pdb.set_trace()" 
> > > > to the top of your function and walking through it to see why it 
> doesn't work. 
> > > > 
> > > > def foo(x): 
> > > > import pdb;pdb.set_trace() 
> > > > 
> > > > list = [] 
> > > > if isinstance(x, list): 
> > > > for i in x: 
> > > > elem = i 
> > > > return list + foo(i) 
> > > > else: 
> > > > return 1 
> > > > 
> > > > See https://docs.python.org/2/library/pdb.html on how pdb works. 
> > > > There are faster ways to debug, but when starting out, pdb lets you 
> see what is happening as you run the function. 
> 

Re: Re: Django python fuction

[hito koto]

Thanks

2014年6月11日水曜日 10時37分43秒 UTC+9 Qiancong:
>
>  
> Yeah, I think hito koto need a function like copy.deepcopy.. I think he 
> known copy.deepcopy before(as his example said),  just not known how to 
> write a funtion work as copy.deecopy does for list.
>  
> --
>  moqia...@gmail.com 
>  
>  *From:* François Schiettecatte 
> *Date:* 2014-06-11 00:21
> *To:* django-users 
> *Subject:* Re: Django python fuction
>  Wouldn't the deep copy module handle this for you:
>  
> https://docs.python.org/2/library/copy.html
>  
> François
>  
> On Jun 10, 2014, at 12:17 PM, hito koto > 
> wrote:
>  
> > Hi,  Qiancong :
> > 
> > I was looking for exactly this、
> > Thank you ver much!
> > 
> > 
> > 2014年6月10日火曜日 23時35分52秒 UTC+9 Qiancong:
> > 
> > Hi, hito koto:
> > I think you want to deep copy the list. The following code maybe  
> helpful:
> > def dcopy(obj):
> > if not isinstance(obj, list):
> > return obj
> > return [dcopy(x) for x in obj]
> >  
> > But this function only deep copy for list.  You can change code as what 
> I did for dic, set, tuple , etc ..
> > moqia...@gmail.com
> >  
> > From: François Schiettecatte
> > Date: 2014-06-10 22:07
> > To: django-users
> > Subject: Re: Django python fuction
> > You need to use .append() to add elements to a list, I suggest you take 
> a look at the python tutorial:
> >  
> > https://docs.python.org/2/tutorial/
> >  
> > Not quite sure what you are doing with i or elem either.
> >  
> > François
> >  
> > On Jun 10, 2014, at 10:01 AM, hito koto  wrote:
> >  
> > > So, I also have errors:
> > >
> > >
> > > >>> def foo(x):
> > > ... myList = []
> > > ... if isinstance(x, list):
> > > ... for i in x:
> > > ... elem = i
> > > ... return myList + foo(elem)
> > > ... else:
> > > ... return 1
> > > ...
> > > >>>
> > > >>> foo(a)
> > > Traceback (most recent call last):
> > >   File "", line 1, in 
> > >   File "", line 6, in foo
> > >   File "", line 6, in foo
> > > TypeError: can only concatenate list (not "int") to list
> > >
> > >
> > >
> > >
> > >
> > > 2014年6月10日火曜日 22時53分28秒 UTC+9 François Schiettecatte:
> > > You are redefining 'list' on  line 2, rename list to myList as follows:
> > >
> > > def foo(x):
> > > myList = []
> > > if isinstance(x, list):
> > > for i in x:
> > > elem = i
> > > return myList + foo(i)
> > > else:
> > > return 1
> > >
> > > And take this to a python list, this is for django.
> > >
> > > Cheers
> > >
> > > François
> > >
> > >
> > > On Jun 10, 2014, at 9:43 AM, hito koto  wrote:
> > >
> > > > hi,
> > > >
> > > > I have this erroes:
> > > >
> > > > >>> def foo(x):
> > > > ... list = []
> > > > ... if isinstance(x, list):
> > > > ... for i in x:
> > > > ... elem = i
> > > > ... return list + foo(i)
> > > > ... else:
> > > > ... return 1
> > > > ...
> > > > >>> foo(a)
> > > > Traceback (most recent call last):
> > > >   File "", line 1, in 
> > > >   File "", line 3, in foo
> > > > TypeError: isinstance() arg 2 must be a class, type, or tuple of 
> classes and types
> > > >
> > > >
> > > >
> > > > 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell:
> > > > In general, I recommend adding the line "import pdb;pdb.set_trace()"
> > > > to the top of your function and walking through it to see why it 
> doesn't work.
> > > >
> > > > def foo(x):
> > > > import pdb;pdb.set_trace()
> > > >
> > > > list = []
> > > > if isinstance(x, list):
> > > > for i in x:
> > > > elem = i
> > > > return list + foo(i)
> > > > else:
> >

Re: Re: Django python fuction

[moqianc...@gmail.com]

Yeah, I think hito koto need a function like copy.deepcopy.. I think he known 
copy.deepcopy before(as his example said),  just not known how to write a 
funtion work as copy.deecopy does for list.




moqianc...@gmail.com

From: François Schiettecatte
Date: 2014-06-11 00:21
To: django-users
Subject: Re: Django python fuction
Wouldn't the deep copy module handle this for you:

https://docs.python.org/2/library/copy.html

François

On Jun 10, 2014, at 12:17 PM, hito koto  wrote:

> Hi,  Qiancong :
> 
> I was looking for exactly this、
> Thank you ver much!
> 
> 
> 2014年6月10日火曜日 23時35分52秒 UTC+9 Qiancong:
> 
> Hi, hito koto:
> I think you want to deep copy the list. The following code maybe  helpful:
> def dcopy(obj):
> if not isinstance(obj, list):
> return obj
> return [dcopy(x) for x in obj]
>  
> But this function only deep copy for list.  You can change code as what I did 
> for dic, set, tuple , etc ..
> moqia...@gmail.com
>  
> From: François Schiettecatte
> Date: 2014-06-10 22:07
> To: django-users
> Subject: Re: Django python fuction
> You need to use .append() to add elements to a list, I suggest you take a 
> look at the python tutorial:
>  
> https://docs.python.org/2/tutorial/
>  
> Not quite sure what you are doing with i or elem either.
>  
> François
>  
> On Jun 10, 2014, at 10:01 AM, hito koto  wrote:
>  
> > So, I also have errors:
> >
> >
> > >>> def foo(x):
> > ... myList = []
> > ... if isinstance(x, list):
> > ... for i in x:
> > ... elem = i
> > ... return myList + foo(elem)
> > ... else:
> > ... return 1
> > ...
> > >>>
> > >>> foo(a)
> > Traceback (most recent call last):
> >   File "", line 1, in 
> >   File "", line 6, in foo
> >   File "", line 6, in foo
> > TypeError: can only concatenate list (not "int") to list
> >
> >
> >
> >
> >
> > 2014年6月10日火曜日 22時53分28秒 UTC+9 François Schiettecatte:
> > You are redefining 'list' on  line 2, rename list to myList as follows:
> >
> > def foo(x):
> > myList = []
> > if isinstance(x, list):
> > for i in x:
> > elem = i
> > return myList + foo(i)
> > else:
> > return 1
> >
> > And take this to a python list, this is for django.
> >
> > Cheers
> >
> > François
> >
> >
> > On Jun 10, 2014, at 9:43 AM, hito koto  wrote:
> >
> > > hi,
> > >
> > > I have this erroes:
> > >
> > > >>> def foo(x):
> > > ... list = []
> > > ... if isinstance(x, list):
> > > ... for i in x:
> > > ... elem = i
> > > ... return list + foo(i)
> > > ... else:
> > > ... return 1
> > > ...
> > > >>> foo(a)
> > > Traceback (most recent call last):
> > >   File "", line 1, in 
> > >   File "", line 3, in foo
> > > TypeError: isinstance() arg 2 must be a class, type, or tuple of classes 
> > > and types
> > >
> > >
> > >
> > > 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell:
> > > In general, I recommend adding the line "import pdb;pdb.set_trace()"
> > > to the top of your function and walking through it to see why it doesn't 
> > > work.
> > >
> > > def foo(x):
> > > import pdb;pdb.set_trace()
> > >
> > > list = []
> > > if isinstance(x, list):
> > > for i in x:
> > > elem = i
> > > return list + foo(i)
> > > else:
> > > return 1
> > >
> > > See https://docs.python.org/2/library/pdb.html on how pdb works.
> > > There are faster ways to debug, but when starting out, pdb lets you see 
> > > what is happening as you run the function.
> > >
> > >
> > > Some questions I have about this function:
> > > - What is the purpose of the "elem" function? It is never accessed.
> > > - What is the purpose of returning 1 if the argument is not a list?
> > > - Why is it named "foo" rather than something that tells me what the 
> > > purpose of the function is?
> > >
> > >
> > > On Tue, Jun 10, 2014 at 8:16 AM, hito ko

Re: Django python fuction

[François Schiettecatte]

Wouldn't the deep copy module handle this for you:

https://docs.python.org/2/library/copy.html

François

On Jun 10, 2014, at 12:17 PM, hito koto  wrote:

> Hi,  Qiancong :
> 
> I was looking for exactly this、
> Thank you ver much!
> 
> 
> 2014年6月10日火曜日 23時35分52秒 UTC+9 Qiancong:
> 
> Hi, hito koto:
> I think you want to deep copy the list. The following code maybe  helpful:
> def dcopy(obj):
> if not isinstance(obj, list):
> return obj
> return [dcopy(x) for x in obj]
>  
> But this function only deep copy for list.  You can change code as what I did 
> for dic, set, tuple , etc ..
> moqia...@gmail.com
>  
> From: François Schiettecatte
> Date: 2014-06-10 22:07
> To: django-users
> Subject: Re: Django python fuction
> You need to use .append() to add elements to a list, I suggest you take a 
> look at the python tutorial:
>  
> https://docs.python.org/2/tutorial/
>  
> Not quite sure what you are doing with i or elem either.
>  
> François
>  
> On Jun 10, 2014, at 10:01 AM, hito koto  wrote:
>  
> > So, I also have errors:
> >
> >
> > >>> def foo(x):
> > ... myList = []
> > ... if isinstance(x, list):
> > ... for i in x:
> > ... elem = i
> > ... return myList + foo(elem)
> > ... else:
> > ... return 1
> > ...
> > >>>
> > >>> foo(a)
> > Traceback (most recent call last):
> >   File "", line 1, in 
> >   File "", line 6, in foo
> >   File "", line 6, in foo
> > TypeError: can only concatenate list (not "int") to list
> >
> >
> >
> >
> >
> > 2014年6月10日火曜日 22時53分28秒 UTC+9 François Schiettecatte:
> > You are redefining 'list' on  line 2, rename list to myList as follows:
> >
> > def foo(x):
> > myList = []
> > if isinstance(x, list):
> > for i in x:
> > elem = i
> > return myList + foo(i)
> > else:
> > return 1
> >
> > And take this to a python list, this is for django.
> >
> > Cheers
> >
> > François
> >
> >
> > On Jun 10, 2014, at 9:43 AM, hito koto  wrote:
> >
> > > hi,
> > >
> > > I have this erroes:
> > >
> > > >>> def foo(x):
> > > ... list = []
> > > ... if isinstance(x, list):
> > > ... for i in x:
> > > ... elem = i
> > > ... return list + foo(i)
> > > ... else:
> > > ... return 1
> > > ...
> > > >>> foo(a)
> > > Traceback (most recent call last):
> > >   File "", line 1, in 
> > >   File "", line 3, in foo
> > > TypeError: isinstance() arg 2 must be a class, type, or tuple of classes 
> > > and types
> > >
> > >
> > >
> > > 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell:
> > > In general, I recommend adding the line "import pdb;pdb.set_trace()"
> > > to the top of your function and walking through it to see why it doesn't 
> > > work.
> > >
> > > def foo(x):
> > > import pdb;pdb.set_trace()
> > >
> > > list = []
> > > if isinstance(x, list):
> > > for i in x:
> > > elem = i
> > > return list + foo(i)
> > > else:
> > > return 1
> > >
> > > See https://docs.python.org/2/library/pdb.html on how pdb works.
> > > There are faster ways to debug, but when starting out, pdb lets you see 
> > > what is happening as you run the function.
> > >
> > >
> > > Some questions I have about this function:
> > > - What is the purpose of the "elem" function? It is never accessed.
> > > - What is the purpose of returning 1 if the argument is not a list?
> > > - Why is it named "foo" rather than something that tells me what the 
> > > purpose of the function is?
> > >
> > >
> > > On Tue, Jun 10, 2014 at 8:16 AM, hito koto  wrote:
> > > Hello,
> > >
> > > I don't know how can i do to change to write python function
> > > I want to following code change to write python function　or change to 
> > > write  recursive definition
> > > >>> y = [10, 12, [13, [14, 9], 16], 7]

Re: Re: Django python fuction

[hito koto]

Hi,  Qiancong :

I was looking for exactly this、
Thank you ver much!


2014年6月10日火曜日 23時35分52秒 UTC+9 Qiancong:
>
>  
> Hi, hito koto:
> I think you want to deep copy the list. The following code maybe  helpful:
>  def dcopy(obj):
> if not isinstance(obj, list):
> return obj
> return [dcopy(x) for x in obj]
>  
> But this function only deep copy for list.  You can change code as what I 
> did for dic, set, tuple , etc ..
> --
>  moqia...@gmail.com 
>  
>  *From:* François Schiettecatte 
> *Date:* 2014-06-10 22:07
> *To:* django-users 
> *Subject:* Re: Django python fuction
>  You need to use .append() to add elements to a list, I suggest you take 
> a look at the python tutorial:
>  
> https://docs.python.org/2/tutorial/
>  
> Not quite sure what you are doing with i or elem either.
>  
> François
>  
> On Jun 10, 2014, at 10:01 AM, hito koto > 
> wrote:
>  
> > So, I also have errors:
> > 
> > 
> > >>> def foo(x):
> > ... myList = []
> > ... if isinstance(x, list):
> > ... for i in x:
> > ... elem = i
> > ... return myList + foo(elem)
> > ... else:
> > ... return 1
> > ...
> > >>>
> > >>> foo(a)
> > Traceback (most recent call last):
> >   File "", line 1, in 
> >   File "", line 6, in foo
> >   File "", line 6, in foo
> > TypeError: can only concatenate list (not "int") to list
> > 
> > 
> > 
> > 
> > 
> > 2014年6月10日火曜日 22時53分28秒 UTC+9 François Schiettecatte:
> > You are redefining 'list' on  line 2, rename list to myList as follows: 
> > 
> > def foo(x): 
> > myList = [] 
> > if isinstance(x, list): 
> > for i in x: 
> > elem = i 
> > return myList + foo(i) 
> > else: 
> > return 1 
> > 
> > And take this to a python list, this is for django. 
> > 
> > Cheers 
> > 
> > François 
> > 
> > 
> > On Jun 10, 2014, at 9:43 AM, hito koto  wrote: 
> > 
> > > hi, 
> > > 
> > > I have this erroes: 
> > > 
> > > >>> def foo(x): 
> > > ... list = [] 
> > > ... if isinstance(x, list): 
> > > ... for i in x: 
> > > ... elem = i 
> > > ... return list + foo(i) 
> > > ... else: 
> > > ... return 1 
> > > ... 
> > > >>> foo(a) 
> > > Traceback (most recent call last): 
> > >   File "", line 1, in  
> > >   File "", line 3, in foo 
> > > TypeError: isinstance() arg 2 must be a class, type, or tuple of 
> classes and types 
> > > 
> > > 
> > > 
> > > 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell: 
> > > In general, I recommend adding the line "import pdb;pdb.set_trace()" 
> > > to the top of your function and walking through it to see why it 
> doesn't work. 
> > > 
> > > def foo(x): 
> > > import pdb;pdb.set_trace() 
> > > 
> > > list = [] 
> > > if isinstance(x, list): 
> > > for i in x: 
> > > elem = i 
> > > return list + foo(i) 
> > > else: 
> > > return 1 
> > > 
> > > See https://docs.python.org/2/library/pdb.html on how pdb works. 
> > > There are faster ways to debug, but when starting out, pdb lets you 
> see what is happening as you run the function. 
> > > 
> > > 
> > > Some questions I have about this function: 
> > > - What is the purpose of the "elem" function? It is never accessed. 
> > > - What is the purpose of returning 1 if the argument is not a list? 
> > > - Why is it named "foo" rather than something that tells me what the 
> purpose of the function is? 
> > > 
> > > 
> > > On Tue, Jun 10, 2014 at 8:16 AM, hito koto  
> wrote: 
> > > Hello, 
> > > 
> > > I don't know how can i do to change to write python function 
> > > I want to following code change to write python function or change to 
> write  recursive definition 
> > > >>> y = [10, 12, [13, [14, 9], 16], 7] 
> > > >>> z = copy.deepcopy(y) 
> > > >>> y 
> > &

Re: Re: Django python fuction

[moqianc...@gmail.com]

Hi, hito koto:
I think you want to deep copy the list. The following code maybe  helpful:
def dcopy(obj):
if not isinstance(obj, list):
return obj
return [dcopy(x) for x in obj]

But this function only deep copy for list.  You can change code as what I did 
for dic, set, tuple , etc ..



moqianc...@gmail.com

From: François Schiettecatte
Date: 2014-06-10 22:07
To: django-users
Subject: Re: Django python fuction
You need to use .append() to add elements to a list, I suggest you take a look 
at the python tutorial:

https://docs.python.org/2/tutorial/

Not quite sure what you are doing with i or elem either.

François

On Jun 10, 2014, at 10:01 AM, hito koto  wrote:

> So, I also have errors:
> 
> 
> >>> def foo(x):
> ... myList = []
> ... if isinstance(x, list):
> ... for i in x:
> ... elem = i
> ... return myList + foo(elem)
> ... else:
> ... return 1
> ...
> >>>
> >>> foo(a)
> Traceback (most recent call last):
>   File "", line 1, in 
>   File "", line 6, in foo
>   File "", line 6, in foo
> TypeError: can only concatenate list (not "int") to list
> 
> 
> 
> 
> 
> 2014年6月10日火曜日 22時53分28秒 UTC+9 François Schiettecatte:
> You are redefining 'list' on  line 2, rename list to myList as follows: 
> 
> def foo(x): 
> myList = [] 
> if isinstance(x, list): 
> for i in x: 
> elem = i 
> return myList + foo(i) 
> else: 
> return 1 
> 
> And take this to a python list, this is for django. 
> 
> Cheers 
> 
> François 
> 
> 
> On Jun 10, 2014, at 9:43 AM, hito koto  wrote: 
> 
> > hi, 
> > 
> > I have this erroes: 
> > 
> > >>> def foo(x): 
> > ... list = [] 
> > ... if isinstance(x, list): 
> > ... for i in x: 
> > ... elem = i 
> > ... return list + foo(i) 
> > ... else: 
> > ... return 1 
> > ... 
> > >>> foo(a) 
> > Traceback (most recent call last): 
> >   File "", line 1, in  
> >   File "", line 3, in foo 
> > TypeError: isinstance() arg 2 must be a class, type, or tuple of classes 
> > and types 
> > 
> > 
> > 
> > 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell: 
> > In general, I recommend adding the line "import pdb;pdb.set_trace()" 
> > to the top of your function and walking through it to see why it doesn't 
> > work. 
> > 
> > def foo(x): 
> > import pdb;pdb.set_trace() 
> > 
> > list = [] 
> > if isinstance(x, list): 
> > for i in x: 
> > elem = i 
> > return list + foo(i) 
> > else: 
> > return 1 
> > 
> > See https://docs.python.org/2/library/pdb.html on how pdb works. 
> > There are faster ways to debug, but when starting out, pdb lets you see 
> > what is happening as you run the function. 
> > 
> > 
> > Some questions I have about this function: 
> > - What is the purpose of the "elem" function? It is never accessed. 
> > - What is the purpose of returning 1 if the argument is not a list? 
> > - Why is it named "foo" rather than something that tells me what the 
> > purpose of the function is? 
> > 
> > 
> > On Tue, Jun 10, 2014 at 8:16 AM, hito koto  wrote: 
> > Hello, 
> > 
> > I don't know how can i do to change to write python function 
> > I want to following code change to write python function　or change to write 
> >  recursive definition 
> > >>> y = [10, 12, [13, [14, 9], 16], 7] 
> > >>> z = copy.deepcopy(y) 
> > >>> y 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> z 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> z[2][1][1] 
> > 9 
> > >>> z[2][1][1] = 88 
> > >>> z 
> > [10, 12, [13, [14, 88], 16], 7] 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> 
> > 
> > this is my use function but not work: 
> > 
> > def foo(x): 
> > list = [] 
> > if isinstance(x, list): 
> > for i in x: 
> > elem = i 
> > return list + foo(i) 
> > else: 
> > return 1 
> > 
> > 
> > 
> > 
> > 
> > -- 
> > You received this message because you are subscribed to the Google Groups 
> > 

Re: Django python fuction

[François Schiettecatte]

You need to use .append() to add elements to a list, I suggest you take a look 
at the python tutorial:

https://docs.python.org/2/tutorial/

Not quite sure what you are doing with i or elem either.

François

On Jun 10, 2014, at 10:01 AM, hito koto  wrote:

> So, I also have errors:
> 
> 
> >>> def foo(x):
> ... myList = []
> ... if isinstance(x, list):
> ... for i in x:
> ... elem = i
> ... return myList + foo(elem)
> ... else:
> ... return 1
> ...
> >>>
> >>> foo(a)
> Traceback (most recent call last):
>   File "", line 1, in 
>   File "", line 6, in foo
>   File "", line 6, in foo
> TypeError: can only concatenate list (not "int") to list
> 
> 
> 
> 
> 
> 2014年6月10日火曜日 22時53分28秒 UTC+9 François Schiettecatte:
> You are redefining 'list' on  line 2, rename list to myList as follows: 
> 
> def foo(x): 
> myList = [] 
> if isinstance(x, list): 
> for i in x: 
> elem = i 
> return myList + foo(i) 
> else: 
> return 1 
> 
> And take this to a python list, this is for django. 
> 
> Cheers 
> 
> François 
> 
> 
> On Jun 10, 2014, at 9:43 AM, hito koto  wrote: 
> 
> > hi, 
> > 
> > I have this erroes: 
> > 
> > >>> def foo(x): 
> > ... list = [] 
> > ... if isinstance(x, list): 
> > ... for i in x: 
> > ... elem = i 
> > ... return list + foo(i) 
> > ... else: 
> > ... return 1 
> > ... 
> > >>> foo(a) 
> > Traceback (most recent call last): 
> >   File "", line 1, in  
> >   File "", line 3, in foo 
> > TypeError: isinstance() arg 2 must be a class, type, or tuple of classes 
> > and types 
> > 
> > 
> > 
> > 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell: 
> > In general, I recommend adding the line "import pdb;pdb.set_trace()" 
> > to the top of your function and walking through it to see why it doesn't 
> > work. 
> > 
> > def foo(x): 
> > import pdb;pdb.set_trace() 
> > 
> > list = [] 
> > if isinstance(x, list): 
> > for i in x: 
> > elem = i 
> > return list + foo(i) 
> > else: 
> > return 1 
> > 
> > See https://docs.python.org/2/library/pdb.html on how pdb works. 
> > There are faster ways to debug, but when starting out, pdb lets you see 
> > what is happening as you run the function. 
> > 
> > 
> > Some questions I have about this function: 
> > - What is the purpose of the "elem" function? It is never accessed. 
> > - What is the purpose of returning 1 if the argument is not a list? 
> > - Why is it named "foo" rather than something that tells me what the 
> > purpose of the function is? 
> > 
> > 
> > On Tue, Jun 10, 2014 at 8:16 AM, hito koto  wrote: 
> > Hello, 
> > 
> > I don't know how can i do to change to write python function 
> > I want to following code change to write python function　or change to write 
> >  recursive definition 
> > >>> y = [10, 12, [13, [14, 9], 16], 7] 
> > >>> z = copy.deepcopy(y) 
> > >>> y 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> z 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> z[2][1][1] 
> > 9 
> > >>> z[2][1][1] = 88 
> > >>> z 
> > [10, 12, [13, [14, 88], 16], 7] 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> 
> > 
> > this is my use function but not work: 
> > 
> > def foo(x): 
> > list = [] 
> > if isinstance(x, list): 
> > for i in x: 
> > elem = i 
> > return list + foo(i) 
> > else: 
> > return 1 
> > 
> > 
> > 
> > 
> > 
> > -- 
> > You received this message because you are subscribed to the Google Groups 
> > "Django users" group. 
> > To unsubscribe from this group and stop receiving emails from it, send an 
> > email to django-users...@googlegroups.com. 
> > To post to this group, send email to django...@googlegroups.com. 
> > Visit this group at http://groups.google.com/group/django-users. 
> > To view this discussion on the web visit 
> > https://groups.google.com/d/msgid/django-users/cf982ef6-1398-4292-9001-eab418f2035a%40googlegroups.com.
> >  
> > For more options, visit https://groups.google.com/d/optout. 
> > 
> > 
> > -- 
> > You received this message because you are subscribed to the Google Groups 
> > "Django users" group. 
> > To unsubscribe from this group and stop receiving emails from it, send an 
> > email to django-users...@googlegroups.com. 
> > To post to this group, send email to django...@googlegroups.com. 
> > Visit this group at http://groups.google.com/group/django-users. 
> > To view this discussion on the web visit 
> > https://groups.google.com/d/msgid/django-users/2347967a-55c4-400b-9bf3-7aacc4f27311%40googlegroups.com.
> >  
> > For more options, visit https://groups.google.com/d/optout. 
> 
> 
> -- 
> You received this message because you are subscribed to the Google Groups 
> "Django users" group.
> To unsubscribe from this group and stop receiving emails from it, send an 

Re: Django python fuction

[hito koto]

So, I also have errors:


>>> def foo(x):
... myList = []
... if isinstance(x, list):
... for i in x:
... elem = i
... return myList + foo(elem)
... else:
... return 1
...
>>>
>>> foo(a)
Traceback (most recent call last):
  File "", line 1, in 
  File "", line 6, in foo
  File "", line 6, in foo
TypeError: can only concatenate list (not "int") to list





2014年6月10日火曜日 22時53分28秒 UTC+9 François Schiettecatte:
>
> You are redefining 'list' on  line 2, rename list to myList as follows: 
>
> def foo(x): 
> myList = [] 
> if isinstance(x, list): 
> for i in x: 
> elem = i 
> return myList + foo(i) 
> else: 
> return 1 
>
> And take this to a python list, this is for django. 
>
> Cheers 
>
> François 
>
>
> On Jun 10, 2014, at 9:43 AM, hito koto > 
> wrote: 
>
> > hi, 
> > 
> > I have this erroes: 
> > 
> > >>> def foo(x): 
> > ... list = [] 
> > ... if isinstance(x, list): 
> > ... for i in x: 
> > ... elem = i 
> > ... return list + foo(i) 
> > ... else: 
> > ... return 1 
> > ... 
> > >>> foo(a) 
> > Traceback (most recent call last): 
> >   File "", line 1, in  
> >   File "", line 3, in foo 
> > TypeError: isinstance() arg 2 must be a class, type, or tuple of classes 
> and types 
> > 
> > 
> > 
> > 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell: 
> > In general, I recommend adding the line "import pdb;pdb.set_trace()" 
> > to the top of your function and walking through it to see why it doesn't 
> work. 
> > 
> > def foo(x): 
> > import pdb;pdb.set_trace() 
> > 
> > list = [] 
> > if isinstance(x, list): 
> > for i in x: 
> > elem = i 
> > return list + foo(i) 
> > else: 
> > return 1 
> > 
> > See https://docs.python.org/2/library/pdb.html on how pdb works. 
> > There are faster ways to debug, but when starting out, pdb lets you see 
> what is happening as you run the function. 
> > 
> > 
> > Some questions I have about this function: 
> > - What is the purpose of the "elem" function? It is never accessed. 
> > - What is the purpose of returning 1 if the argument is not a list? 
> > - Why is it named "foo" rather than something that tells me what the 
> purpose of the function is? 
> > 
> > 
> > On Tue, Jun 10, 2014 at 8:16 AM, hito koto  wrote: 
> > Hello, 
> > 
> > I don't know how can i do to change to write python function 
> > I want to following code change to write python function or change to 
> write  recursive definition 
> > >>> y = [10, 12, [13, [14, 9], 16], 7] 
> > >>> z = copy.deepcopy(y) 
> > >>> y 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> z 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> z[2][1][1] 
> > 9 
> > >>> z[2][1][1] = 88 
> > >>> z 
> > [10, 12, [13, [14, 88], 16], 7] 
> > [10, 12, [13, [14, 9], 16], 7] 
> > >>> 
> > 
> > this is my use function but not work: 
> > 
> > def foo(x): 
> > list = [] 
> > if isinstance(x, list): 
> > for i in x: 
> > elem = i 
> > return list + foo(i) 
> > else: 
> > return 1 
> > 
> > 
> > 
> > 
> > 
> > -- 
> > You received this message because you are subscribed to the Google 
> Groups "Django users" group. 
> > To unsubscribe from this group and stop receiving emails from it, send 
> an email to django-users...@googlegroups.com. 
> > To post to this group, send email to django...@googlegroups.com. 
> > Visit this group at http://groups.google.com/group/django-users. 
> > To view this discussion on the web visit 
> https://groups.google.com/d/msgid/django-users/cf982ef6-1398-4292-9001-eab418f2035a%40googlegroups.com.
>  
>
> > For more options, visit https://groups.google.com/d/optout. 
> > 
> > 
> > -- 
> > You received this message because you are subscribed to the Google 
> Groups "Django users" group. 
> > To unsubscribe from this group and stop receiving emails from it, send 
> an email to django-users...@googlegroups.com . 
> > To post to this group, send email to django...@googlegroups.com 
> . 
> > Visit this group at http://groups.google.com/group/django-users. 
> > To view this discussion on the web visit 
> https://groups.google.com/d/msgid/django-users/2347967a-55c4-400b-9bf3-7aacc4f27311%40googlegroups.com.
>  
>
> > For more options, visit https://groups.google.com/d/optout. 
>
>

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Re: Django python fuction

[François Schiettecatte]

You are redefining 'list' on  line 2, rename list to myList as follows:

def foo(x):
myList = []
if isinstance(x, list):
for i in x:
elem = i
return myList + foo(i)
else:
return 1

And take this to a python list, this is for django.

Cheers

François


On Jun 10, 2014, at 9:43 AM, hito koto  wrote:

> hi,
> 
> I have this erroes:
> 
> >>> def foo(x):
> ... list = []
> ... if isinstance(x, list):
> ... for i in x:
> ... elem = i
> ... return list + foo(i)
> ... else:
> ... return 1
> ...
> >>> foo(a)
> Traceback (most recent call last):
>   File "", line 1, in 
>   File "", line 3, in foo
> TypeError: isinstance() arg 2 must be a class, type, or tuple of classes and 
> types
> 
> 
> 
> 2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell:
> In general, I recommend adding the line "import pdb;pdb.set_trace()"
> to the top of your function and walking through it to see why it doesn't work.
> 
> def foo(x):
> import pdb;pdb.set_trace()
> 
> list = []
> if isinstance(x, list):
> for i in x:
> elem = i
> return list + foo(i)
> else:
> return 1
> 
> See https://docs.python.org/2/library/pdb.html on how pdb works.
> There are faster ways to debug, but when starting out, pdb lets you see what 
> is happening as you run the function.
> 
> 
> Some questions I have about this function:
> - What is the purpose of the "elem" function? It is never accessed.
> - What is the purpose of returning 1 if the argument is not a list?
> - Why is it named "foo" rather than something that tells me what the purpose 
> of the function is?
> 
> 
> On Tue, Jun 10, 2014 at 8:16 AM, hito koto  wrote:
> Hello,
> 
> I don't know how can i do to change to write python function
> I want to following code change to write python function　or change to write  
> recursive definition
> >>> y = [10, 12, [13, [14, 9], 16], 7]
> >>> z = copy.deepcopy(y)
> >>> y
> [10, 12, [13, [14, 9], 16], 7]
> >>> z
> [10, 12, [13, [14, 9], 16], 7]
> >>> z[2][1][1]
> 9
> >>> z[2][1][1] = 88
> >>> z
> [10, 12, [13, [14, 88], 16], 7]
> [10, 12, [13, [14, 9], 16], 7]
> >>>
> 
> this is my use function but not work:
> 
> def foo(x):
> list = []
> if isinstance(x, list):
> for i in x:
> elem = i
> return list + foo(i)
> else:
> return 1
> 
> 
> 
> 
> 
> -- 
> You received this message because you are subscribed to the Google Groups 
> "Django users" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to django-users...@googlegroups.com.
> To post to this group, send email to django...@googlegroups.com.
> Visit this group at http://groups.google.com/group/django-users.
> To view this discussion on the web visit 
> https://groups.google.com/d/msgid/django-users/cf982ef6-1398-4292-9001-eab418f2035a%40googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
> 
> 
> -- 
> You received this message because you are subscribed to the Google Groups 
> "Django users" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to django-users+unsubscr...@googlegroups.com.
> To post to this group, send email to django-users@googlegroups.com.
> Visit this group at http://groups.google.com/group/django-users.
> To view this discussion on the web visit 
> https://groups.google.com/d/msgid/django-users/2347967a-55c4-400b-9bf3-7aacc4f27311%40googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.

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Re: Django python fuction

[hito koto]

hi,

I have this erroes:

>>> def foo(x):
... list = []
... if isinstance(x, list):
... for i in x:
... elem = i
... return list + foo(i)
... else:
... return 1
...
>>> foo(a)
Traceback (most recent call last):
  File "", line 1, in 
  File "", line 3, in foo
TypeError: isinstance() arg 2 must be a class, type, or tuple of classes 
and types



2014年6月10日火曜日 22時27分42秒 UTC+9 Andrew Farrell:
>
> In general, I recommend adding the line "import pdb;pdb.set_trace()"
> to the top of your function and walking through it to see why it doesn't 
> work.
>
> def foo(x):
> import pdb;pdb.set_trace()
>
> list = []
> if isinstance(x, list):
> for i in x:
> elem = i
> return list + foo(i)
> else:
> return 1
>
> See https://docs.python.org/2/library/pdb.html on how pdb works.
> There are faster ways to debug, but when starting out, pdb lets you see 
> what is happening as you run the function.
>
>
> Some questions I have about this function:
> - What is the purpose of the "elem" function? It is never accessed.
> - What is the purpose of returning 1 if the argument is not a list?
> - Why is it named "foo" rather than something that tells me what the 
> purpose of the function is?
>
>
> On Tue, Jun 10, 2014 at 8:16 AM, hito koto  > wrote:
>
>> Hello,
>>
>> I don't know how can i do to change to write python function
>> I want to following code change to write python function or change to 
>> write  recursive definition
>> >>> y = [10, 12, [13, [14, 9], 16], 7]
>> >>> z = copy.deepcopy(y)
>> >>> y
>> [10, 12, [13, [14, 9], 16], 7]
>> >>> z
>> [10, 12, [13, [14, 9], 16], 7]
>> >>> z[2][1][1]
>> 9
>> >>> z[2][1][1] = 88
>> >>> z
>> [10, 12, [13, [14, 88], 16], 7]
>> [10, 12, [13, [14, 9], 16], 7]
>> >>>
>>
>> this is my use function but not work:
>>
>> def foo(x):
>> list = []
>> if isinstance(x, list):
>> for i in x:
>> elem = i
>> return list + foo(i)
>> else:
>> return 1
>>
>>
>>
>>
>>  -- 
>> You received this message because you are subscribed to the Google Groups 
>> "Django users" group.
>> To unsubscribe from this group and stop receiving emails from it, send an 
>> email to django-users...@googlegroups.com .
>> To post to this group, send email to django...@googlegroups.com 
>> .
>> Visit this group at http://groups.google.com/group/django-users.
>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/django-users/cf982ef6-1398-4292-9001-eab418f2035a%40googlegroups.com
>>  
>> 
>> .
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>

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Re: Django python fuction

[Andrew Farrell]

In general, I recommend adding the line "import pdb;pdb.set_trace()"
to the top of your function and walking through it to see why it doesn't
work.

def foo(x):
import pdb;pdb.set_trace()

list = []
if isinstance(x, list):
for i in x:
elem = i
return list + foo(i)
else:
return 1

See https://docs.python.org/2/library/pdb.html on how pdb works.
There are faster ways to debug, but when starting out, pdb lets you see
what is happening as you run the function.


Some questions I have about this function:
- What is the purpose of the "elem" function? It is never accessed.
- What is the purpose of returning 1 if the argument is not a list?
- Why is it named "foo" rather than something that tells me what the
purpose of the function is?


On Tue, Jun 10, 2014 at 8:16 AM, hito koto  wrote:

> Hello,
>
> I don't know how can i do to change to write python function
> I want to following code change to write python function or change to
> write  recursive definition
> >>> y = [10, 12, [13, [14, 9], 16], 7]
> >>> z = copy.deepcopy(y)
> >>> y
> [10, 12, [13, [14, 9], 16], 7]
> >>> z
> [10, 12, [13, [14, 9], 16], 7]
> >>> z[2][1][1]
> 9
> >>> z[2][1][1] = 88
> >>> z
> [10, 12, [13, [14, 88], 16], 7]
> [10, 12, [13, [14, 9], 16], 7]
> >>>
>
> this is my use function but not work:
>
> def foo(x):
> list = []
> if isinstance(x, list):
> for i in x:
> elem = i
> return list + foo(i)
> else:
> return 1
>
>
>
>
>  --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to django-users+unsubscr...@googlegroups.com.
> To post to this group, send email to django-users@googlegroups.com.
> Visit this group at http://groups.google.com/group/django-users.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/django-users/cf982ef6-1398-4292-9001-eab418f2035a%40googlegroups.com
> 
> .
> For more options, visit https://groups.google.com/d/optout.
>

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