[Tutor] IF Statements
Rajeev Nair
rajeev1204 at gmail.com
Mon Oct 6 13:24:57 CEST 2008
also i believe the first line can also be written as 'x = input('enter
.......') instead of using x=int(raw_input('......') . use raw_input for
string and just input for integer.
regards
rajeev
On Mon, Oct 6, 2008 at 3:30 PM, <tutor-request at python.org> wrote:
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> Today's Topics:
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> 1. Re: Tutor Digest, Vol 56, Issue 22 (Lie Ryan)
> 2. Re: Tutor Digest, Vol 56, Issue 22 (Lie Ryan)
> 3. Re: IF statements (Alan Gauld)
> 4. Re: first call - newcomer (Alan Gauld)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 06 Oct 2008 12:46:49 +0700
> From: Lie Ryan <lie.1296 at gmail.com>
> Subject: Re: [Tutor] Tutor Digest, Vol 56, Issue 22
> To: tutor at python.org
> Message-ID: <1223272009.6409.8.camel at lieryan-laptop>
> Content-Type: text/plain
>
> On Mon, 2008-10-06 at 05:32 +0200, tutor-request at python.org wrote:
> >
> > Message: 8
> > Date: Sun, 5 Oct 2008 20:27:39 -0700
> > From: Anthony Smith <gods_bud666 at hotmail.com>
> > Subject: [Tutor] first call - newcomer
> > To: <tutor at python.org>
> > Message-ID: <BLU146-W21D0F815F794C49517F301CA390 at phx.gbl>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> >
> > This is my first post - I will be brief...
> >
> > One: I have programmed before - but it has been DECADES...so just a
> > few simple queries:
> >
> > 1. A brief (but complete) description regarding the use of script
> > editor (I will be using
>
> Your script editor can be any plain text-editing tools, Notepad could
> do.
>
> > command prompt in Windows), as:
> >
> > a. details about loading and saving programs (not in that
> > order) and little
> > specs about pathnames or other requirements (I will
> > probably store all
> > my little goodies in one folder or space).
>
> Pathnames is free, you can name your program anything your OS allows for
> a file. A convention is to name the script ending with .py/.pyw
> extension (command-line script/GUI script), although python doesn't
> complain if it is not in those extension (in Windows, the extension is
> associated with the interpreter). Calling a program from command line is
> done like this:
>
> python filename.py
>
> > That should get me going ... a book and manual by my side should
> > suffice for
> > the rest - - - except for one thing:
>
> > 2. I have been unable to locate the gizmo in the literature to get
> > ascii codes
> > in python. In the old days, it was a list of 256 (or so)
> > characters that
> > represented all keyboard symbols (A equalled 36; B equalled 37; et
> > cetera).
> > To assign a value, you used "Let A$ = ASC (36)" where A$ was a
> > variable
> > and 36 was the ASCII value for 'A'. I believe the reverse of this
> > process
> > was PRINT VAL(A$) or something. I want to play with a program
> > that will
> > assign a number to a word (using a simple algorhythm that will give
> > a
> > specific number to every word). Other stuff is pretty easy to
> > find with
> > the book and on-line literature. I will need to get an ascii code
> > out of
> > a string (whose content is not known to the programmer, as
> > raw_input).
> > Then to assign, I will need the actual list with assigned numbers.
>
> a = ord('A')
> b = chr(36)
>
> -- read on the help file: Built-in Functions
>
> > You will be giving me probably the only boost I will need! I will be
> > available later on,
> > if I want to take part in the ask/answer system here.
>
>
>
> ------------------------------
>
> Message: 2
> Date: Mon, 06 Oct 2008 12:46:49 +0700
> From: Lie Ryan <lie.1296 at gmail.com>
> Subject: Re: [Tutor] Tutor Digest, Vol 56, Issue 22
> To: tutor at python.org
> Message-ID: <1223272009.6409.8.camel at lieryan-laptop>
> Content-Type: text/plain
>
> On Mon, 2008-10-06 at 05:32 +0200, tutor-request at python.org wrote:
> >
> > Message: 8
> > Date: Sun, 5 Oct 2008 20:27:39 -0700
> > From: Anthony Smith <gods_bud666 at hotmail.com>
> > Subject: [Tutor] first call - newcomer
> > To: <tutor at python.org>
> > Message-ID: <BLU146-W21D0F815F794C49517F301CA390 at phx.gbl>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> >
> > This is my first post - I will be brief...
> >
> > One: I have programmed before - but it has been DECADES...so just a
> > few simple queries:
> >
> > 1. A brief (but complete) description regarding the use of script
> > editor (I will be using
>
> Your script editor can be any plain text-editing tools, Notepad could
> do.
>
> > command prompt in Windows), as:
> >
> > a. details about loading and saving programs (not in that
> > order) and little
> > specs about pathnames or other requirements (I will
> > probably store all
> > my little goodies in one folder or space).
>
> Pathnames is free, you can name your program anything your OS allows for
> a file. A convention is to name the script ending with .py/.pyw
> extension (command-line script/GUI script), although python doesn't
> complain if it is not in those extension (in Windows, the extension is
> associated with the interpreter). Calling a program from command line is
> done like this:
>
> python filename.py
>
> > That should get me going ... a book and manual by my side should
> > suffice for
> > the rest - - - except for one thing:
>
> > 2. I have been unable to locate the gizmo in the literature to get
> > ascii codes
> > in python. In the old days, it was a list of 256 (or so)
> > characters that
> > represented all keyboard symbols (A equalled 36; B equalled 37; et
> > cetera).
> > To assign a value, you used "Let A$ = ASC (36)" where A$ was a
> > variable
> > and 36 was the ASCII value for 'A'. I believe the reverse of this
> > process
> > was PRINT VAL(A$) or something. I want to play with a program
> > that will
> > assign a number to a word (using a simple algorhythm that will give
> > a
> > specific number to every word). Other stuff is pretty easy to
> > find with
> > the book and on-line literature. I will need to get an ascii code
> > out of
> > a string (whose content is not known to the programmer, as
> > raw_input).
> > Then to assign, I will need the actual list with assigned numbers.
>
> a = ord('A')
> b = chr(36)
>
> -- read on the help file: Built-in Functions
>
> > You will be giving me probably the only boost I will need! I will be
> > available later on,
> > if I want to take part in the ask/answer system here.
>
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 6 Oct 2008 09:31:04 +0100
> From: "Alan Gauld" <alan.gauld at btinternet.com>
> Subject: Re: [Tutor] IF statements
> To: tutor at python.org
> Message-ID: <gccicb$436$1 at ger.gmane.org>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
> "WM" <WFERGUSON1 at SOCAL.RR.COM> wrote
>
> > to IF. The code below was not written by me. It is a copy/paste
> > job from the tutor. I do not have any idea what is going wrong.
>
> > >>> x = int(raw_input("Please enter an integer: "))
> > Please enter an integer: 42
> > >>> if x < 0:
> > ... x = 0
> > ... print 'Negative changed to zero'
> > ... elif x == 0:
> > ... print 'Zero'
> > ... elif x == 1:
> > ... print 'Single'
> > ... else:
> > ... print 'More'
> > ...
> > More
> > 12
> > SyntaxError: invalid syntax
>
> It looks as if you maybe cut more than you intended?
> Also I'm not sure about the ... prompts. I don't have 2.6 yet
> so maybe its an enhancement to IDLE but notmally IDLE
> doesn't print ... prompts. Did you cut n paste them too?
> If so that would confuse IDLE.
>
> HTH,
>
> --
> Alan Gauld
> Author of the Learn to Program web site
> http://www.freenetpages.co.uk/hp/alan.gauld
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Mon, 6 Oct 2008 09:38:14 +0100
> From: "Alan Gauld" <alan.gauld at btinternet.com>
> Subject: Re: [Tutor] first call - newcomer
> To: tutor at python.org
> Message-ID: <gccipp$5bk$1 at ger.gmane.org>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
>
> "Anthony Smith" <gods_bud666 at hotmail.com> wrote
>
> > This is my first post - I will be brief...
>
> Hi, welcome to tutor :-)
>
> > 1. A brief (but complete) description regarding the use of script
> > editor (I will be using command prompt in Windows), as:
>
> Brief and Complete don;t normally go together!
> If you are using IDLE then Danny yoo's intro is a good place to start.
> The IDLE section of the Python web site has a more detailed run
> through oof the faciilities.
>
> a. details about loading and saving programs (not in that
> order) and little
> specs about pathnames or other requirements (I will
> probably store all
> my little goodies in one folder or space).
>
> As to paths:
>
> PATH should be set to the folder where the Python interpreters live
> PYTHONPATH should be set to include the folder where your code lives
>
> > 2. I have been unable to locate the gizmo in the literature to get
> > ascii codes
> > in python.
>
> chr(n) is the function you need
> ord(c) is the one in the opposite direction
>
> but...
>
> > was PRINT VAL(A$) or something.
>
> Python will generally figure out what you want to print without
> explicit conversions, certainly fewer than you will be used to
> from the early BASIC versions.
>
> > assign a number to a word (using a simple algorhythm that will
> > give a
> > specific number to every word). Other stuff is pretty easy to
> > find with
> > the book and on-line literature. I will need to get an ascii
> > code out of
> > a string (whose content is not known to the programmer, as
> > raw_input).
> > Then to assign, I will need the actual list with assigned
> > numbers.
>
> OK, You lost me here.
> Can you give an example of what the data would look like?
>
> HTH,
>
> --
> Alan Gauld
> Author of the Learn to Program web site
> http://www.freenetpages.co.uk/hp/alan.gauld
>
>
>
>
> ------------------------------
>
> _______________________________________________
> Tutor maillist - Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor
>
>
> End of Tutor Digest, Vol 56, Issue 23
> *************************************
>
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