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ജഗന്നാഥ്  
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 More options Jul 23 2008, 10:51 am
Newsgroups: comp.lang.python
From: ജഗന്നാഥ് <jagana...@gmail.com>
Date: Wed, 23 Jul 2008 07:51:17 -0700 (PDT)
Local: Wed, Jul 23 2008 10:51 am
Subject: Doubt
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Friends

I am a Perl programmer new to Python. I have a small doubt.
How to convert the perl notation
$a = ""; expression in Python ?

How to represent the loop
for ($a = $b; $a<=$c;$a++){

} in Python

Jagan
Linguist

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Guilherme Polo  
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 More options Jul 23 2008, 11:07 am
Newsgroups: comp.lang.python
From: "Guilherme Polo" <ggp...@gmail.com>
Date: Wed, 23 Jul 2008 12:07:33 -0300
Local: Wed, Jul 23 2008 11:07 am
Subject: Re: Doubt
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On Wed, Jul 23, 2008 at 11:51 AM, ജഗന്നാഥ് <jagana...@gmail.com> wrote:
> Friends

> I am a Perl programmer new to Python. I have a small doubt.
> How to convert the perl notation
> $a = ""; expression in Python ?

a = ""

> How to represent the loop
> for ($a = $b; $a<=$c;$a++){
> } in Python

for a in range(b, c + 1): pass

--
-- Guilherme H. Polo Goncalves

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Sean DiZazzo  
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 More options Jul 23 2008, 3:22 pm
Newsgroups: comp.lang.python
From: Sean DiZazzo <half.ital...@gmail.com>
Date: Wed, 23 Jul 2008 12:22:42 -0700 (PDT)
Local: Wed, Jul 23 2008 3:22 pm
Subject: Re: Doubt
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On Jul 23, 7:51 am, ജഗന്നാഥ് <jagana...@gmail.com> wrote:

> Friends

> I am a Perl programmer new to Python. I have a small doubt.
> How to convert the perl notation
> $a = ""; expression in Python ?

> How to represent the loop
> for ($a = $b; $a<=$c;$a++){

> } in Python

> Jagan
> Linguist

On most occasions you don't need to use the incrementing loop
behavior.  Lists are the main data structure comparable to an array,
and you can iterate over them without using a counter.  If you have:

aList = [1, 2, 3]

you can do

for item in aList:
    print item

Hope this helps.

~Sean


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Paddy  
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 More options Jul 23 2008, 3:56 pm
Newsgroups: comp.lang.python
From: Paddy <paddy3...@googlemail.com>
Date: Wed, 23 Jul 2008 12:56:35 -0700 (PDT)
Local: Wed, Jul 23 2008 3:56 pm
Subject: Re: Doubt
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On Jul 23, 3:51 pm, ജഗന്നാഥ് <jagana...@gmail.com> wrote:

> Friends

> I am a Perl programmer new to Python. I have a small doubt.
> How to convert the perl notation
> $a = ""; expression in Python ?

> How to represent the loop
> for ($a = $b; $a<=$c;$a++){

> } in Python

> Jagan
> Linguist

This might help you generally:
  http://wiki.python.org/moin/PerlPhrasebook

- Paddy.


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Fredrik Lundh  
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 More options Jul 23 2008, 4:13 pm
Newsgroups: comp.lang.python
From: Fredrik Lundh <fred...@pythonware.com>
Date: Wed, 23 Jul 2008 22:13:32 +0200
Local: Wed, Jul 23 2008 4:13 pm
Subject: Re: Doubt
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ജഗന്നാഥ് wrote:
> I am a Perl programmer new to Python. I have a small doubt.

I suspect you mean "question", not "doubt".  It's not quite the same thing.

> How to convert the perl notation
> $a = ""; expression in Python ?

> How to represent the loop
> for ($a = $b; $a<=$c;$a++){
> } in Python

Start here:

     http://www.lucasmanual.com/mywiki/PerlPythonPhrasebook

and then read either of these (preferably both):

     http://www.swaroopch.com/byteofpython/
     http://docs.python.org/tut/

</F>


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ജഗന്നാഥ്  
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 More options Jul 24 2008, 1:57 am
Newsgroups: comp.lang.python
From: ജഗന്നാഥ് <jagana...@gmail.com>
Date: Wed, 23 Jul 2008 22:57:51 -0700 (PDT)
Local: Thurs, Jul 24 2008 1:57 am
Subject: Re: Doubt
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On Jul 24, 1:13 am, Fredrik Lundh <fred...@pythonware.com> wrote:
> ജഗന്നാഥ് wrote:
> > I am a Perl programmer new to Python. I have a small doubt.

> I suspect you mean "question", not "doubt".  It's not quite the same thing.

> > How to convert the perl notation
> > $a = ""; expression in Python ?

Thank you for all to giving suggestions .

With regards

Jaganadh G


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Diez B. Roggisch  
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 More options Jul 24 2008, 9:19 am
Newsgroups: comp.lang.python
From: "Diez B. Roggisch" <de...@nospam.web.de>
Date: Thu, 24 Jul 2008 15:19:09 +0200
Local: Thurs, Jul 24 2008 9:19 am
Subject: Re: Doubt
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Fredrik Lundh wrote:
> ജഗന്നാഥ് wrote:

>> I am a Perl programmer new to Python. I have a small doubt.

> I suspect you mean "question", not "doubt".  It's not quite the same
> thing.

It seems to be an Indian/Asian thing. By now, I tuned myself to read "doubt"
as "question/problem"...

Diez


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Tobiah  
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 More options Jul 24 2008, 2:46 pm
Newsgroups: comp.lang.python
From: Tobiah <t...@tobiah.org>
Date: Thu, 24 Jul 2008 11:46:49 -0700
Local: Thurs, Jul 24 2008 2:46 pm
Subject: Re: Doubt
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>> How to convert the perl notation
>> $a = ""; expression in Python ?

a = ""

>> How to represent the loop
>> for ($a = $b; $a<=$c;$a++){

>> } in Python

for a in range(b, c + 1):
        do_something()
** Posted from http://www.teranews.com **

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Michael Torrie  
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 More options Jul 25 2008, 1:37 am
Newsgroups: comp.lang.python
From: Michael Torrie <torr...@gmail.com>
Date: Thu, 24 Jul 2008 23:37:50 -0600
Local: Fri, Jul 25 2008 1:37 am
Subject: Re: Doubt
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You wrote:
> How to represent the loop
> for ($a = $b; $a<=$c;$a++){
> } in Python

As other pointed out, iterating through a list or range is often a far
more elegant way to do a loop than a C-style loop.  But the C-style for
loop is just syntactic sugar for a while loop.  In some cases, C-style
for loops can have an initializer, a set of conditions, and incrementer
parts that are all based on different variables.  For example:

for (a=begin_func() ; x < 3 and sometest(b) ; i=somefunc() )

This highly illogical and contrived function could not be represented in
python with a simple "for x in blah" statement.  Rather you have to
represent it in its true form, which is a while loop:

a=begin_func()
while x < 3 and sometest(b):
        #do stuff
        #loop body
        i=somefunc()

In fact, the perl/c for loop of the form:

for (<initializer>;<condition>;<incrementer>)

always translates directly to:

<initializer>
while <condition>:
        #loop body

        <incrementer>


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