Typecasting

[Shah, Rajesh \(GE Consumer & Industrial\)]

Hi Everybody,

Can you guide me to convert string into Int datatype?
(i.e. How can we convert string into int? like '555' into 555)

Thanks in advance.

~Rajesh

[Duncan Booth]

Re: Typecasting

"Shah, Rajesh \(GE Consumer & Industrial\)" <Rajesh.Shah@ge .com> wrote in
news:mailman.19 8.1077534828.27 104.python-list@python.org :
[color=blue]
> Hi Everybody,
>
> Can you guide me to convert string into Int datatype?
> (i.e. How can we convert string into int? like '555' into 555)
>
> Thanks in advance.
>
> ~Rajesh
>
>[/color]
[color=blue][color=green][color=darkred]
>>> int('555')[/color][/color][/color]
555

In general, if there is a conversion defined between two types then you do
the conversion by calling the destination type. So calling int() will
convert a string, float, or long to an int (but it won't convert a complex
number); calling str() will convert just about anything to a string;
calling list will convert other sequences into a list and so on.
[color=blue][color=green][color=darkred]
>>> int(3j)[/color][/color][/color]

Traceback (most recent call last):
File "<pyshell#7 >", line 1, in -toplevel-
int(3j)
TypeError: can't convert complex to int; use int(abs(z))[color=blue][color=green][color=darkred]
>>> int(4.6)[/color][/color][/color]
4[color=blue][color=green][color=darkred]
>>> str(3.5)[/color][/color][/color]
'3.5'[color=blue][color=green][color=darkred]
>>> list('hello')[/color][/color][/color]
['h', 'e', 'l', 'l', 'o'][color=blue][color=green][color=darkred]
>>>[/color][/color][/color]

[Irmen de Jong]

Re: Typecasting

Duncan Booth wrote:
[color=blue]
> "Shah, Rajesh \(GE Consumer & Industrial\)" <Rajesh.Shah@ge .com> wrote in
> news:mailman.19 8.1077534828.27 104.python-list@python.org :
>
>[color=green]
>>Hi Everybody,
>>
>>Can you guide me to convert string into Int datatype?
>>(i.e. How can we convert string into int? like '555' into 555)
>>
>>Thanks in advance.
>>
>>~Rajesh
>>
>>[/color]
>
>[color=green][color=darkred]
>>>>int('555' )[/color][/color]
>
> 555
>
> In general, if there is a conversion defined between two types then you do
> the conversion by calling the destination type. So calling int() will
> convert a string, float, or long to an int (but it won't convert a complex
> number); calling str() will convert just about anything to a string;
> calling list will convert other sequences into a list and so on.[/color]

THe important word here is 'convert'. Python doesn't know about the
concept of type 'casting'... ;-)

--Irmen

[Harry George]

Re: Typecasting

"Shah, Rajesh \(GE Consumer & Industrial\)" <Rajesh.Shah@ge .com> writes:
[color=blue]
> Hi Everybody,
>
> Can you guide me to convert string into Int datatype?
> (i.e. How can we convert string into int? like '555' into 555)
>
> Thanks in advance.
>
> ~Rajesh
>[/color]

Others have answered with "int". You should also wrap that with an
exception handler, because your string might not actually be a number.

x=raw_input("En ter number") #actually got "one"
try:
y=int(x)
except ValueError:
print 'Use numeric numbers, e.g., "123", not "one two three"'

Also, "typecast" usually means "the same bits, but interpreted a
different way". E.g., reading an IEEE 32-bit float as an array of
bytes.

"Type coercion" means "convert the actual bits, so that the meaning is
similar but it is different in RAM". This is used for string<->int,
int<->float, etc.

--
harry.g.george@ boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 342-0007

[Jani Yusef]

Re: Typecasting

"Shah, Rajesh \(GE Consumer & Industrial\)" <Rajesh.Shah@ge .com> wrote in message news:<mailman.1 98.1077534828.2 7104.python-list@python.org >...[color=blue]
> Hi Everybody,
>
> Can you guide me to convert string into Int datatype?
> (i.e. How can we convert string into int? like '555' into 555)
>
> Thanks in advance.
>
> ~Rajesh[/color]

Wow, YAMQFAI (Yet Another Moronic Question From An Indian). What is
terrible is how GE is now suffering because of these dollar a day
idiots. Man, what exactly did you learn at IIT? Did you learn how to
stop wiping your ass with your bare hand at least?
Anyway, the answer to your question is
s="555"
i=int(s)
now i is equal to 555.

[Paul Prescod]

Re: Typecasting

Jani Yusef wrote:
[color=blue]
> ...
> Wow, YAMQFAI (Yet Another Moronic Question From An Indian). What is
> terrible is how GE is now suffering because of these dollar a day
> idiots. Man, what exactly did you learn at IIT? Did you learn how to
> stop wiping your ass with your bare hand at least?
> Anyway, the answer to your question is
> s="555"
> i=int(s)
> now i is equal to 555.[/color]

Better to not answer than to answer with contempt and racism. Among
other problems, you give a poor impression of Pythonistas and Persians.
You should spew bile into another forum from a different email address.

Paul Prescod

[Jason Drew]

Re: Typecasting

In

http://www.python.org/doc/2.3.3/lib/built-in-funcs.html

see the function
int([x[, radix]])

Jason

"Shah, Rajesh \(GE Consumer & Industrial\)" <Rajesh.Shah@ge .com> wrote in message news:<mailman.1 98.1077534828.2 7104.python-list@python.org >...[color=blue]
> Hi Everybody,
>
> Can you guide me to convert string into Int datatype?
> (i.e. How can we convert string into int? like '555' into 555)
>
> Thanks in advance.
>
> ~Rajesh[/color]

[R Hughes]

Re: Typecasting

No doubt someone has already suggested eval()
as in:
string = '555'
number = eval(s)

"Shah, Rajesh (GE Consumer & Industrial)" <Rajesh.Shah@ge .com> wrote in
message news:mailman.19 8.1077534828.27 104.python-list@python.org ...
Hi Everybody,

Can you guide me to convert string into Int datatype?
(i.e. How can we convert string into int? like '555' into 555)

Thanks in advance.

~Rajesh

[Erik Max Francis]

Re: Typecasting

R Hughes wrote:
[color=blue]
> No doubt someone has already suggested eval()
> as in:
> string = '555'
> number = eval(s)[/color]

For something that is as well-defined as simply converting an integer,
int is far, far preferable to eval. All eval does is introduce the
possibility of serious security problems if used incorrectly, whereas
int has none.

--
__ Erik Max Francis && max@alcyone.com && http://www.alcyone.com/max/
/ \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ A man can stand a lot as long as he can stand himself.
-- Axel Munthe

[Marco Aschwanden]

Re: Typecasting

Don't forget the string-library with its atof-, atoi-, atol-method:
[color=blue][color=green][color=darkred]
>>> import string
>>> string.atoi('55 5')[/color][/color][/color]
555

Have a nice day,
Marco

[Aahz]

Re: Typecasting

In article <15c2d03b.04022 40646.558226ef@ posting.google. com>,
Marco Aschwanden <PPNTWIMBXFFC@s pammotel.com> wrote:[color=blue]
>
>Don't forget the string-library with its atof-, atoi-, atol-method:
>[color=green][color=darkred]
>>>> import string
>>>> string.atoi('55 5')[/color][/color]
>555[/color]

That's deprecated. Use the type objects to convert.
--
Aahz (aahz@pythoncra ft.com) <*> http://www.pythoncraft.com/

"Do not taunt happy fun for loops. Do not change lists you are looping over."
--Remco Gerlich, comp.lang.pytho n