Re: Re: Django Python roop

[Javier Guerra Giraldez]

On Wed, Jun 11, 2014 at 8:12 AM, moqianc...@gmail.com
 wrote:
> write right code, write clean code,  It's a basic rule for our develope
> work.


for that you have to learn what the code means.  "while x !=[]:" will
always be an endless loop.  the "[]" doesn't do what you think.

-- 
Javier

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Re: Django Python roop

[hito koto]

Ok, thank you!

2014年6月11日水曜日 21時52分54秒 UTC+9 Qiancong:
>
>  
> Hi, hito koto:
> I think  the problems you asked should be post in python-lang mail-list. 
> For python program,  I prefer "for", not "while";  It's more simpler.
> But  if you like while, I think the following code maybe helpful:
>  
> *def fff(x):*
> *y = []*
> *i = 0*
> *xlen = len(x)*
> *while i< xlen:*
> *y.append(x[i])*
> *i += 1*
> *return y*
>  
> but I more like the follow writing:
> *def fff(x):*
> *return x[:]*
>  
> or you just do as following:
> *y  = x[:]*
>  
> python is a power & beautiful language,   
> please read the  https://docs.python.org/2/tutorial/ at first like 
>  François said.
>  
> With Regards.
>  
> --
>  moqia...@gmail.com 
>  
>  *From:* hito koto 
> *Date:* 2014-06-11 19:21
> *To:* django-users 
> *Subject:* Django Python roop
>  Hello, all
>
> I want to change to while statement from for statement, so how can i do 
> to?
>
> this is my correct for statement codes:
>
> def fff(x):
> y = []
> for i in range(len(x)):
> y.append(x[i])
> return y
>
> and i want change to while statement 
>
> So, this code have erroes:
> TypeError: list indices must be integers, not list
> def fff(x):
> y = []
> while x !=[]:
>for i in x:
>y.append(x[i])
> return y
>
> -- 
>
>

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Re: Django Python roop

[Erik Cederstrand]

Den 11/06/2014 kl. 14.49 skrev hito koto :

> MemoryError , Why? idon't know.
> I try this have Traceback (most recent call last):
>   File "", line 1, in 
>   File "", line 5, in foo
> MemoryError errors:  
> 
> I'm change to this code: have the Memory Error,
> 
> def foo(x):
> y = []
> while x != []:
> for i in range(len(x)):
> y.append(x[i])
> return y

Your function doesn't modify "x", so "x != []" is always true. You created an 
endless loop which appends "y" until memory is exhausted. Hence the MemoryError.

These aren't Django-specific questions anymore, so you should head over to a 
Python mailing list to get further help with basic Python programming.

Erik

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Re: Re: Django Python roop

[moqianc...@gmail.com]

Sometimes, I have to use while statement too. But any time, I think 
write right code, write clean code,  It's a basic rule for our develope work.




moqianc...@gmail.com

From: hito koto
Date: 2014-06-11 21:05
To: django-users
Subject: Re: Django Python roop

Hi, qiancong:
Thank you,
Do you not use the while statement to Django?


2014年6月11日水曜日 21時52分54秒 UTC+9 Qiancong:
 
Hi, hito koto:
I think  the problems you asked should be post in python-lang mail-list. 
For python program,  I prefer "for", not "while";  It's more simpler.
But  if you like while, I think the following code maybe helpful:

def fff(x):
y = []
i = 0
xlen = len(x)
while i< xlen:
y.append(x[i])
i += 1
return y

but I more like the follow writing:
def fff(x):
return x[:]

or you just do as following:
y  = x[:]

python is a power & beautiful language,   
please read the  https://docs.python.org/2/tutorial/ at first like  François 
said.

With Regards.




moqia...@gmail.com

From: hito koto
Date: 2014-06-11 19:21
To: django-users
Subject: Django Python roop
Hello, all

I want to change to while statement from for statement, so how can i do to?

this is my correct for statement codes:

def fff(x):
y = []
for i in range(len(x)):
y.append(x[i])
return y

and i want change to while statement 

So, this code have erroes:
TypeError: list indices must be integers, not list
def fff(x):
y = []
while x !=[]:
   for i in x:
   y.append(x[i])
return y

-- 


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Re: Re: Django Python roop

[moqianc...@gmail.com]

In your function, if x is not a empty list,  then while will be a infinite 
loop, x always not be  [];
then the inner for-loop  will append many many items into y list, Then your 
computer will say "have the Memory Error",  to tell you the memory not enought.





moqianc...@gmail.com

From: hito koto
Date: 2014-06-11 20:49
To: django-users
Subject: Re: Django Python roop
MemoryError , Why? idon't know.
I try this have Traceback (most recent call last):
  File "", line 1, in 
  File "", line 5, in foo
MemoryError errors:  

I'm change to this code: have the Memory Error,

def foo(x):
y = []
while x != []:
for i in range(len(x)):
y.append(x[i])
return y



2014年6月11日水曜日 20時21分42秒 UTC+9 hito koto:
Hello, all

I want to change to while statement from for statement, so how can i do to?

this is my correct for statement codes:

def fff(x):
y = []
for i in range(len(x)):
y.append(x[i])
return y

and i want change to while statement 

So, this code have erroes:
TypeError: list indices must be integers, not list
def fff(x):
y = []
while x !=[]:
   for i in x:
   y.append(x[i])
return y

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Re: Django Python roop

[hito koto]

Hi, qiancong:
Thank you,
Do you not use the while statement to Django?


2014年6月11日水曜日 21時52分54秒 UTC+9 Qiancong:
>
>  
> Hi, hito koto:
> I think  the problems you asked should be post in python-lang mail-list. 
> For python program,  I prefer "for", not "while";  It's more simpler.
> But  if you like while, I think the following code maybe helpful:
>  
> *def fff(x):*
> *y = []*
> *i = 0*
> *xlen = len(x)*
> *while i< xlen:*
> *y.append(x[i])*
> *i += 1*
> *return y*
>  
> but I more like the follow writing:
> *def fff(x):*
> *return x[:]*
>  
> or you just do as following:
> *y  = x[:]*
>  
> python is a power & beautiful language,   
> please read the  https://docs.python.org/2/tutorial/ at first like 
>  François said.
>  
> With Regards.
>  
> --
>  moqia...@gmail.com 
>  
>  *From:* hito koto 
> *Date:* 2014-06-11 19:21
> *To:* django-users 
> *Subject:* Django Python roop
>  Hello, all
>
> I want to change to while statement from for statement, so how can i do 
> to?
>
> this is my correct for statement codes:
>
> def fff(x):
> y = []
> for i in range(len(x)):
> y.append(x[i])
> return y
>
> and i want change to while statement 
>
> So, this code have erroes:
> TypeError: list indices must be integers, not list
> def fff(x):
> y = []
> while x !=[]:
>for i in x:
>y.append(x[i])
> return y
>
> -- 
>
>

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Re: Django Python roop

[hito koto]

hi, Ilya Kazakevich:

I would like to change the while statement from the for statement

2014年6月11日水曜日 21時49分32秒 UTC+9 hito koto:
>
> MemoryError , Why? idon't know.
> I try this have Traceback (most recent call last):
>   File "", line 1, in 
>   File "", line 5, in foo
> MemoryError errors:  
>
> I'm change to this code: have the Memory Error,
>
> def foo(x):
> y = []
> while x != []:
> for i in range(len(x)):
> y.append(x[i])
> return y
>
>
>
> 2014年6月11日水曜日 20時21分42秒 UTC+9 hito koto:
>>
>> Hello, all
>>
>> I want to change to while statement from for statement, so how can i do 
>> to?
>>
>> this is my correct for statement codes:
>>
>> def fff(x):
>> y = []
>> for i in range(len(x)):
>> y.append(x[i])
>> return y
>>
>> and i want change to while statement 
>>
>> So, this code have erroes:
>> TypeError: list indices must be integers, not list
>> def fff(x):
>> y = []
>> while x !=[]:
>>for i in x:
>>y.append(x[i])
>> return y
>>
>

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Re: Django Python roop

[moqianc...@gmail.com]

Hi, hito koto:
I think  the problems you asked should be post in python-lang mail-list. 
For python program,  I prefer "for", not "while";  It's more simpler.
But  if you like while, I think the following code maybe helpful:

def fff(x):
y = []
i = 0
xlen = len(x)
while i< xlen:
y.append(x[i])
i += 1
return y

but I more like the follow writing:
def fff(x):
return x[:]

or you just do as following:
y  = x[:]

python is a power & beautiful language,   
please read the  https://docs.python.org/2/tutorial/ at first like  François 
said.

With Regards.




moqianc...@gmail.com

From: hito koto
Date: 2014-06-11 19:21
To: django-users
Subject: Django Python roop
Hello, all

I want to change to while statement from for statement, so how can i do to?

this is my correct for statement codes:

def fff(x):
y = []
for i in range(len(x)):
y.append(x[i])
return y

and i want change to while statement 

So, this code have erroes:
TypeError: list indices must be integers, not list
def fff(x):
y = []
while x !=[]:
   for i in x:
   y.append(x[i])
return y

-- 

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Re: Django Python roop

[hito koto]

MemoryError , Why? idon't know.
I try this have Traceback (most recent call last):
  File "", line 1, in 
  File "", line 5, in foo
MemoryError errors:  

I'm change to this code: have the Memory Error,

def foo(x):
y = []
while x != []:
for i in range(len(x)):
y.append(x[i])
return y



2014年6月11日水曜日 20時21分42秒 UTC+9 hito koto:
>
> Hello, all
>
> I want to change to while statement from for statement, so how can i do 
> to?
>
> this is my correct for statement codes:
>
> def fff(x):
> y = []
> for i in range(len(x)):
> y.append(x[i])
> return y
>
> and i want change to while statement 
>
> So, this code have erroes:
> TypeError: list indices must be integers, not list
> def fff(x):
> y = []
> while x !=[]:
>for i in x:
>y.append(x[i])
> return y
>

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RE: Django Python roop

[Ilya Kazakevich]

Hello,

What are you trying to do? Split string? Copy array? You probably need to use 
builtin functions for that.


Ilya Kazakevich,
JetBrains PyCharm (Best Python/Django IDE)
http://www.jetbrains.com/pycharm/
"Develop with pleasure!"


>-Original Message-
>From: django-users@googlegroups.com
>[mailto:django-users@googlegroups.com] On Behalf Of hito koto
>Sent: Wednesday, June 11, 2014 3:22 PM
>To: django-users@googlegroups.com
>Subject: Django Python roop
>
>Hello, all
>
>I want to change to while statement from for statement, so how can i do to?
>
>this is my correct for statement codes:
>
>def fff(x):
>y = []
>for i in range(len(x)):
>y.append(x[i])
>return y
>
>and i want change to while statement
>
>So, this code have erroes:
>TypeError: list indices must be integers, not list def fff(x):
>y = []
>while x !=[]:
>   for i in x:
>   y.append(x[i])
>return y
>
>
>--
>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/1f5ae7ed-6fa2-4cf0-8ba7-d59
>088ba1cf5%40googlegroups.com
><https://groups.google.com/d/msgid/django-users/1f5ae7ed-6fa2-4cf0-8ba7-d5
>9088ba1cf5%40googlegroups.com?utm_medium=email_source=footer> .
>For more options, visit https://groups.google.com/d/optout.


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Django Python roop

[hito koto]

Hello, all

I want to change to while statement from for statement, so how can i do to?

this is my correct for statement codes:

def fff(x):
y = []
for i in range(len(x)):
y.append(x[i])
return y

and i want change to while statement 

So, this code have erroes:
TypeError: list indices must be integers, not list
def fff(x):
y = []
while x !=[]:
   for i in x:
   y.append(x[i])
return y

-- 
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