About size of Unicode string

[Frank Abel Cancio Bello]

Hi all!

I need know the size of string object independently of its encoding. For
example:

len('123') == len('123'.encode('utf_8'))

while the size of '123' object is different of the size of
'123'.encode('utf_8')

More:
I need send in HTTP request a string. Then I need know the length of the
string to set the header content-length independently of its encoding.

Any idea?

Thanks in advance
Frank




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RE: About size of Unicode string

[Frank Abel Cancio Bello]

Well I will repeat the question:

Can I get how many bytes have a string object independently of its encoding?
Is the len function the right way of get it?

Laci look the following code:

import urllib2
request = urllib2.Request(url= 'http://localhost:6000')
data = 'data to send\n'.encode('utf_8')
request.add_data(data)
request.add_header('content-length', str(len(data)))
request.add_header('content-encoding', 'UTF-8')
file = urllib2.urlopen(request)

Is always true that the size of the entity-body is len(data)
independently of the encoding of data?


 -Original Message-
 From: Laszlo Zsolt Nagy [mailto:[EMAIL PROTECTED]
 Sent: Monday, June 06, 2005 1:43 PM
 To: Frank Abel Cancio Bello; python-list@python.org
 Subject: Re: About size of Unicode string
 
 Frank Abel Cancio Bello wrote:
 
 Hi all!
 
 I need know the size of string object independently of its encoding. For
 example:
 
  len('123') == len('123'.encode('utf_8'))
 
 while the size of '123' object is different of the size of
 '123'.encode('utf_8')
 
 More:
 I need send in HTTP request a string. Then I need know the length of the
 string to set the header content-length independently of its encoding.
 
 Any idea?
 
 
 This is from the RFC:
 
 
  The Content-Length entity-header field indicates the size of the
  entity-body, in decimal number of OCTETs, sent to the recipient or, in
  the case of the HEAD method, the size of the entity-body that would
  have been sent had the request been a GET.
 
Content-Length= Content-Length : 1*DIGIT
 
 
  An example is
 
Content-Length: 3495
 
 
  Applications SHOULD use this field to indicate the transfer-length of
  the message-body, unless this is prohibited by the rules in section
  4.4 http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.4.
 
  Any Content-Length greater than or equal to zero is a valid value.
  Section 4.4 describes how to determine the length of a message-body if
  a Content-Length is not given.
 
 Looks to me that the Content-Length header has nothing to do with the
 encoding. It is a very low levet stuff. The content length is given in
 OCTETs and it represents the size of the body. Clearly, it has nothing
 to do with MIME/encoding etc. It is about the number of bits transferred
 in the body. Try to write your unicode strings into a StringIO and take
 its length
 
Laci
 
 





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RE: About size of Unicode string

[Frank Abel Cancio Bello]

Thanks to all. Andrew's answer was an excellent explanation. Thanks Leif for
you suggestion.



 -Original Message-
 From: [EMAIL PROTECTED]
 [mailto:[EMAIL PROTECTED] On
 Behalf Of Leif K-Brooks
 Sent: Monday, June 06, 2005 4:29 PM
 To: python-list@python.org
 Subject: Re: About size of Unicode string
 
 Frank Abel Cancio Bello wrote:
  request.add_header('content-encoding', 'UTF-8')
 
 The Content-Encoding header is for things like gzip, not for
 specifying the text encoding. Use the charset parameter to the
 Content-Type header for that, as in Content-Type: text/plain;
 charset=utf-8.
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Re: get textual content of a Xml element using 4DOM

[Frank Abel Cancio Bello]

Hi:

PrettyPrint or Print return the value to the console, and i need keep this 
value in a string variable to work with it, how can i do this?

thanks to Uche

Frank Abel

-Original Message-
From: [EMAIL PROTECTED]
To: python-list@python.org
Date: 4 Mar 2005 09:23:07 -0800
Subject: Re: get textual content of a Xml element using 4DOM

 I suggest using minidom or pxdom [1] rather than 4DOM.  If you insist
 on using 4DOM, xml.dom.ext.Print(node) or xml.dom.ext.PrettyPrint(node)
 does what you want.
 
 [1] http://www.doxdesk.com/software/py/pxdom.html
 
 --Uche
 
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About standard library improvement

[Frank Abel Cancio Bello]

Hi!
If I make some improvement to xmlrpclib module, where I should send this 
improvement to form part of next standard library release?

Thank




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