Sky

There seems to be a bug if the dict has a value of an empty string.

def test_templateEmpStr():
    import stringtemplate
    st = stringtemplate.StringTemplate("empty:$s$ok")
    st['s'] = '' #None,'' ok
    print str(st)
    st = stringtemplate.StringTemplate("empty:$m.s$ok")
    st['m'] = {'s': ''}
    print str(st) # throw exception!

  File "..\\stringtemplate\\language\\ASTExpr.py", line 276, in getObjectProperty
    value = o[ASTExpr.DEFAULT_MAP_VALUE_NAME]
KeyError: '_default_'

I change the line if not value: to if value is None: to fix this so as to allow an empty string in a dict.

        if isinstance(o, stringtemplate.Aggregate) or isinstance(o, dict):
	    #sys.stderr.write("[getObjectProperty] o = " + str(o) + '\n')
            try:
                value = o[propertyName]
            except:
                value = None
            if value is None: #if not value: use if value is None instead to fix !?
                # no property defined; if a map in this group
                # then there may be a default value
                value = o[ASTExpr.DEFAULT_MAP_VALUE_NAME]