equivelant of Java's toString() method? (not repr)

[Alex Hunsley]

Pretty simple seeming question, but can't find answer via google or docs...

I am using urllib2 as follows:

handle = urlopen(req, postdata) # and URL to return a handle
on
...
print handle.info()

the print statement prints out the headers:

Content-Type: text/html;charset=IS O-8859-1
Content-Length: 2845
Date: Tue, 01 Feb 2005 12:40:28 GMT
Server: Apache Coyote/1.0
Connection: close

which is the string I want to use.
However, if I write a function call using this:

log(handle.info ())

I get this:

TypeError: cannot concatenate 'str' and 'instance' objects

(The log function expects a string)
What is the magic incantation to get the string I want so I can pass it
to my function?
I've tried repr() but that isn't it (I suspected it wouldn't be).
I suppose I'm looking for the equivelant of Java's toString() method...

thanks!
alex

[Alex Hunsley]

Re: equivelant of Java's toString() method? (not repr)

Alex Hunsley wrote:[color=blue]
> Pretty simple seeming question, but can't find answer via google or docs...
>
> I am using urllib2 as follows:
>
> handle = urlopen(req, postdata) # and URL to return a handle on
> ...
> print handle.info()
>
> the print statement prints out the headers:
>
> Content-Type: text/html;charset=IS O-8859-1
> Content-Length: 2845
> Date: Tue, 01 Feb 2005 12:40:28 GMT
> Server: Apache Coyote/1.0
> Connection: close
>
> which is the string I want to use.
> However, if I write a function call using this:
>
> log(handle.info ())
>
> I get this:
>
> TypeError: cannot concatenate 'str' and 'instance' objects
>
> (The log function expects a string)
> What is the magic incantation to get the string I want so I can pass it
> to my function?
> I've tried repr() but that isn't it (I suspected it wouldn't be).
> I suppose I'm looking for the equivelant of Java's toString() method...
>
> thanks!
> alex[/color]

Replying to meself...
D'oh! Just found the str() function which is just what I need!

log(str(handle. info())) works fine....

thx
alex

[Roy Smith]

Re: equivelant of Java's toString() method? (not repr)

Alex Hunsley <lard@tardis.ed .ac.molar.uk> wrote:[color=blue]
> I suppose I'm looking for the equivelant of Java's toString() method...[/color]

That would be str(), which for the most part, just calls your object's
__str__() method. If your object doesn't have an __str__() method, there's
nothing magic Python can do to invent one.

The difference between repr() and str() is that repr() is supposed to
produce a parsable representation of the object; one which could be parsed
by a Python interpreter to re-generate the original object. On the other
hand, str() is supposed to produce a human-readable string.

[Ola Natvig]

Re: equivelant of Java's toString() method? (not repr)

Alex Hunsley wrote:[color=blue]
> Pretty simple seeming question, but can't find answer via google or docs...
>
> I am using urllib2 as follows:
>
> handle = urlopen(req, postdata) # and URL to return a handle on
> ...
> print handle.info()
>
> the print statement prints out the headers:
>
> Content-Type: text/html;charset=IS O-8859-1
> Content-Length: 2845
> Date: Tue, 01 Feb 2005 12:40:28 GMT
> Server: Apache Coyote/1.0
> Connection: close
>
> which is the string I want to use.
> However, if I write a function call using this:
>
> log(handle.info ())
>
> I get this:
>
> TypeError: cannot concatenate 'str' and 'instance' objects
>
> (The log function expects a string)
> What is the magic incantation to get the string I want so I can pass it
> to my function?
> I've tried repr() but that isn't it (I suspected it wouldn't be).
> I suppose I'm looking for the equivelant of Java's toString() method...
>
> thanks!
> alex
>
>
>
>[/color]

use:

log(str(handle. info()))

str creates a string object from a supplied object with a __str__
method. I think print calls str on what it is going to print



--
--------------------------------------
Ola Natvig <ola.natvig@inf osense.no>
infoSense AS / development