template_filling.groovy

_DEFAULTS = [
    a : '123',
    b : '456',
    c : []
]

def foo = [ a : '789', c : ['000', '111', 222] ]

def getTemplate() {
    return """
    a : @A@,
    b : @B@,
    c : [
        @C@
    ]
"""
}


def setSetupPyParams( params ) {
    if (params) {
        params = _DEFAULTS + params
    }else{
        params = _DEFAULTS
    }
    String template = getTemplate()
    for (item in params){
        key = '@' + item.key.toUpperCase() + '@'
        value = item.value
        if (value instanceof List) {
            value = value.join(',')
        }
        template = template.replace(key, value)
    }
    return template
}

setSetupPyParams( foo )
​