Background: 
    * url 'yyy'
    And header Authorization = 'xxxxx

  Scenario: read the csv file
    Given url 'xxxx'
    And multipart file importfile = {read:'datasets/zzzz.csv'}
    And multipart file entity = 'contact'
    When method POST
    And print response
    Then status 201
    * def importid = response.data.import_id
    Then print **importid** **replacing this importid in the below url. this changes dynamically**

指定的网址为'https：//' +导入标识符+ '/preview'

* def body =
      """
      {
      "import_id": "importid", **replacing here with the values from importid dynamically**
      "entity_columns": [

两个URL中的导入ID应替换为JSON字符串

背景说明：
场景：

* def importid = response.data.import_id
    Then print **importid**

指定的网址为'https：//' +导入标识符+ '/preview'

* def body =
      """
      {
      "import_id": "<importid>", **replacing here with the values from importid dynamically**
      "entity_columns": [