testing for data type

[Jonathan Bowlas]

Hi Listers,

 

I have a requirement to test for a data type could someone
tell me if this is possible in python?

 

Basically I have a ZPT in Zope that users can select checkboxes
in a form which pass arguments for a python function, however if there is only
one checkbox selected it is passed as a string whereas more than one checkbox
is passed as a list. Therefore if my function is required to perform an action
based on each argument passed in the list the function works correctly but if
it is passed as a string nothing happens.

 

This is my function:

selecteddeptcodes = context.REQUEST.DEPTCODE

currentstatus = context.REQUEST.STATUS

 

if currentstatus == 'pending':

 for dptcd in selecteddeptcodes:

   context.changetolive(DEPTCODE=dptcd)

if currentstatus == 'old':

 for dptcd in selecteddeptcodes:

   context.changetopending(DEPTCODE=dptcd)

return context.pub_dept_form(context, context.REQUEST,
message='Updated Status')

 

The argument in question is selecteddeptcodes.

 

I tried to make my function conditional based on the length
of the argument passed but if it’s just one checkbox value passed the
length of the argument is 2 (which is the number of chars passed in the string)
and if there are two checkboxes the length of the argument (which is the number
of items in the list) is also 2. So that doesn’t help.

 

Any assistance would be appreciated.

 

Jon






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Newbie help - test for data type

[Jonathan Bowlas]

Hi Listers,

I have a requirement to test for a data type could someone tell me if this
is possible in python?

Basically I have a ZPT in Zope that users can select checkboxes in a form
which pass arguments for a python function, however if there is only one
checkbox selected it is passed as a string whereas more than one checkbox is
passed as a list. Therefore if my function is required to perform an action
based on each argument passed in the list the function works correctly but
if it is passed as a string nothing happens.

This is my function:
selecteddeptcodes = context.REQUEST.DEPTCODE
currentstatus = context.REQUEST.STATUS

if currentstatus == 'pending':
 for dptcd in selecteddeptcodes:
   context.changetolive(DEPTCODE=dptcd)
if currentstatus == 'old':
 for dptcd in selecteddeptcodes:
   context.changetopending(DEPTCODE=dptcd)
return context.pub_dept_form(context, context.REQUEST, message='Updated
Status')

The argument in question is selecteddeptcodes.

I tried to make my function conditional based on the length of the argument
passed but if it’s just one checkbox value passed the length of the argument
is 2 (which is the number of chars passed in the string) and if there are
two checkboxes the length of the argument (which is the number of items in
the list) is also 2. So that doesn’t help.

Any assistance would be appreciated.

Jon



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Re: Newbie help - test for data type

[Jonathan Bowlas]

Thanks for everyone’s help, much appreciated, I’ll check
out the isinstance function.

 

Jon

 

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dennis
Benzinger
Sent: 31 July 2006 10:20
To: python-list@python.org
Subject: Re: Newbie help - test for data type

 

Jonathan Bowlas wrote:

> Hi Listers,

> 

> I have a requirement to test for a data type could someone tell me
if this

> is possible in python?

> 

> Basically I have a ZPT in Zope that users can select checkboxes in
a form

> which pass arguments for a python function, however if there is
only one

> checkbox selected it is passed as a string whereas more than one
checkbox is

> passed as a list. Therefore if my function is required to perform
an action

> based on each argument passed in the list the function works
correctly but

> if it is passed as a string nothing happens.

 

You need the isinstance() function. For example you can use

isinstance(selecteddeptcodes, list) to test if your variable is a list.


If you want to test the other way round use 

isinstance(selecteddeptcodes, str) if your variable is a string, 

isinstance(selecteddeptcodes, unicode) if it's a unicode string or 

isinstance(selecteddeptcodes, basestring) to test if it's a string or 

unicode string. Read more about this function and the types to test for


in http://docs.python.org/lib/built-in-funcs.html.

 

If you already have the code for a list argument I'd check if it's not
a 

list and then turn it into a list:

 

 

if not isintance(selecteddeptcodes, list):

 selecteddeptcodes = [selecteddeptcodes]

 

 

 

Bye,

Dennis

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Re:Newbie help - test for data type

[Jonathan Bowlas]

Thanks Bruno, I’ll use this.

 

Much appreciated.

 

Jon

 

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bruno
Desthuilliers
Sent: 31 July 2006 10:37
To: python-list@python.org
Subject: Re: [OT]Newbie help - test for data type

 

Jonathan Bowlas wrote:

> Hi Listers,

> 

> I have a requirement to test for a data type could someone tell me
if this

> is possible in python?

> 

> Basically I have a ZPT in Zope that users can select checkboxes in
a form

> which pass arguments for a python function, however if there is
only one

> checkbox selected it is passed as a string whereas more than one
checkbox is

> passed as a list. 

 

You should have posted this on Zope's mailing-list.

 



There's a mechanism in Zope to handle this case, cf section
"Passing

Parameters to Scripts" in:

http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/DTML.stx/ScriptingZope.stx

 

The mechanism is based on 'decorating' forms fields names with type

annotation. In you case, this would look like:

 





  

 tal:attribute="value code" />







 



 

HTH

 

 

 

-- 

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python -c "print '@'.join(['.'.join([w[::-1] for w in
p.split('.')]) for

p in '[EMAIL PROTECTED]'.split('@')])"

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Convert StringIO to string

[Jonathan Bowlas]

Hi listers,

I've written this little script to generate some html but I cannot get it to
convert to a string so I can perform a replace() on the >, <
characters that get returned.

from StringIO import StringIO

def generator_file(rsspath,titleintro,tickeropt): 
scripter=StringIO()
scripter.write('\n')
scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath,
titleintro, tickeropt))
scripter.write('\n')
return scripter.getvalue()

I tried adding this:

scripter = scripter.replace("<", "<")
scripter = scripter.replace(">", ">")

But obviously replace() isn't an attribute of StringIO so I guess I need to
convert it to a string first, can someone please advise how I can do this?

Cheers

Jon


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RE: Convert StringIO to string

[Jonathan Bowlas]

Ahh thanks, I'll give that a try.

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: 16 October 2006 14:00
To: python-list@python.org
Subject: Re: Convert StringIO to string

Jonathan Bowlas wrote:
> But obviously replace() isn't an attribute of StringIO so I guess I need
to
> convert it to a string first, can someone please advise how I can do this?

StringIO objects are file-like objects, so you need to use read or
readlines to get the string data out of it (just like a regular file).
Before reading remember to seek back to the beginning to get all of the
data ("Be kind, rewind!"):

>>> import StringIO
>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.seek(0)
>>> s.read()
'hello world\n'

>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.read()
''

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RE: Convert StringIO to string

[Jonathan Bowlas]

Ok, I think I'm explaining
this badly because I've used getvalue() in the script I originally submitted to
the list, see below:

 

from StringIO import
StringIO

 

def
generator_file(rsspath,titleintro,tickeropt): 

  scripter=StringIO()

  scripter.write('\n')


  scripter.write('new
rss_ticker(%s, %s, %s)\n' % (rsspath, titleintro, tickeropt))

  scripter.write('\n')

  return
scripter.getvalue()

 

 

The problem is this script
returns the following:

 



 

And I want to replace the
< and > characters for < or > so it actually renders
correctly in a browser so I'm returned this:

 



new rss_ticker(www.bbc.co.uk,
True, True) 

 

So what am I doing wrong?

 

J

 






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