Re: django docs __unicode__ return u'%s %s

> "coded kid" wrote:
>If I may say, 'u' makes it easy to return variable with any hassle.
>And %s rep each string in your script. I think there should be other
>ways to go about this. Hope you get my point?

This is wrong. The prefix 'u' means that the following string is a Unicode
string, nothing more or less. It is a fact for Python 2.x. See
http://docs.python.org/reference/lexical_analysis.html#string-literals

The % character after the unicode string means "string interpolation",
i.e. replacing the placeholders inside the string template on the left.
See the String Formatting Operations http://docs.python.org/library/stdtypes.html#string-formatting-operations
You will also find the placeholder types there.

>> > Krondaj wrote:
>> > > what does the u'%s %s' % mean... I cannot find any exaplanation of
>> > > this in the docs?

The .format() method of the string type is the newer one, introduced
in Python 2.6. It is the preferred way now. But you can use it only
when you can be sure that the Python is 2.6 or newer. The command
in your __unicode__ method would look like:

def __unicode__(self):
return u'{0} {1}'.format(self.first_name, self.last_name)

The '{0}' is the placeholder for the self.first_name (zero'th argument,
the '{1}' is for the first argument (self.last_name), etc. Since Python 2.7
(if I recall correctly) you need not to use the numbers inside:

def __unicode__(self):
return u'{} {}'.format(self.first_name, self.last_name)

You do not want to return only...

def __unicode__(self):
return (self.first_name, self.last_name)

... because you want the method to return the unicode string representation.
Without .format() or without the % the method would return a tuple with
the information, not the string.

Petr

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