functions.py 文件源码

def __init__(self, expression, bbox=False, crs=False, precision=8, **extra):
        expressions = [expression]
        if precision is not None:
            expressions.append(self._handle_param(precision, 'precision', six.integer_types))
        options = 0
        if crs and bbox:
            options = 3
        elif bbox:
            options = 1
        elif crs:
            options = 2
        if options:
            expressions.append(options)
        super(AsGeoJSON, self).__init__(*expressions, **extra)