mapnik/tests/python_tests
Dane Springmeyer 88ca6fca5d Followup to #1642, closes #1859
This change adds back the ability to throw out both empty strings
and null values with the not equals statement like `[attr] != ''`

Note: this does not mean null == '' because the needed compatibility
fix only addresses the "not equals` operator to retain the historical
usage of not matching nulls.
2013-05-31 13:23:59 -07:00
..
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