adding a method to an existing builtin class

[TP]

Hi everybody,

Today I have learned a bit of the news of Python 3.0 compared to 2.4
version.

By the way, I have asked myself if it is possible to add a method to a
builtin type as 'unicode':
['__add__', ..., 'zfill']

For example, I would like to add a "colorize" method to 'unicode' objects.
Is this possible?
Or am I compelled to derive the unicode builtin as below:

class my_unicode(unicode):
def __init__( self, unicode_string ):
super( my_unicode, self ).__init__( )
def colorize( self ):
return "\x1b[93;102m" + self + "\x1b[0m"

my_unicode_string = my_unicode( "coucou" )
print( type( my_unicode_string ) )
print( my_unicode_string.colorize() )
print( my_unicode_string.upper() )

Thanks,

Julien

--
python -c "print ''.join([chr(154 - ord(c)) for c in '*9(9&(18%.\
9&1+,\'Z4(55l4('])"

"When a distinguished but elderly scientist states that something is
possible, he is almost certainly right. When he states that something is
impossible, he is very probably wrong." (first law of AC Clarke)

 

[Chris Rebert]

Hi everybody,

Today I have learned a bit of the news of Python 3.0 compared to 2.4
version.

By the way, I have asked myself if it is possible to add a method to a
builtin type

The built-in types' classes are immutable; you can only add/override
their methods via subclassing, like you showed.

Cheers,
Chris