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latest news

Regex replace

Dec 16, 2009

BY:

Artem Pavlenko

Regular expressions are very useful when working with text.

We already had ‘match’ operator which can be used in filter expressions. In Mapnik2 we now also have:

<mapnik-expression>.replace(<regex>,<pattern>)

Here is a small example :

from mapnik import *
f = Feature(1)
f["name"] = 'Mapnik'
expr = Expression("[name].replace('(\\B)|( )','$1 ')")
expr.evaluate(f)

The above should result in:

'M a p n i k'