我们从Python开源项目中，提取了以下5个代码示例，用于说明如何使用boto3.dynamodb.conditions.ConditionBase()。
def __call__(self, value): if isinstance(value, ConditionBase): # Create a conditional expression string with placeholders # for the provided condition. built_expression = self._condition_builder.build_expression( value, is_key_condition=self._is_key_condition) self._placeholder_names.update( built_expression.attribute_name_placeholders) self._placeholder_values.update( built_expression.attribute_value_placeholders) return built_expression.condition_expression # Use the user provided value if it is not a ConditonBase object. return value
