RF變量列表類型@{}和${}列表類型的關系

 總結：@{}列表類型和${}列表類型都可以表示list類型，均可以通過 set variable 和 create list 創建，區別主要是展示格式和引用格式；

@{}類型可以通過 set variable 和 create list 將其轉換成${}類型；

${}類型只能通過 set variable 將其轉換成@{}；

${}類型通過 create list 將會生成一個只有一個元素的嵌套列表，該唯一的元素值為${}類型本身；

 

@{list1} set variable 1 2 3
@{list2} create list W E Z
${a} set variable @{list1}
${b} set variable @{list2}
${c} create list @{list1}
${d} create list @{list2}
${list4} set variable 1 2 3
${list3} create list a b c
@{A} set variable ${list4}
@{B} set variable ${list3}
@{C} create list ${list4}
@{D} create list ${list3}
Comment log @{list1[${2}]} #出錯
Comment log @{list2[${2}]} #出錯
log @{list1}[${2}]
log @{list2}[${2}]
log ${list1[${2}]}
log ${list2[${2}]}
log ----------------------
log ${list4[${2}]}
log ${list3[${2}]}
Comment log @{list4[${2}]} #出錯
Comment log @{list3[${2}]} #出錯

-------------------------------------------------------------------------運行結果：

20171030 10:09:43.430 : INFO : @{list1} = [ 1 | 2 | 3 ]
20171030 10:09:43.446 : INFO : @{list2} = [ W | E | Z ]
20171030 10:09:43.446 : INFO : ${a} = [u'1', u'2', u'3']
20171030 10:09:43.446 : INFO : ${b} = [u'W', u'E', u'Z']
20171030 10:09:43.446 : INFO : ${c} = [u'1', u'2', u'3']
20171030 10:09:43.446 : INFO : ${d} = [u'W', u'E', u'Z']
20171030 10:09:43.446 : INFO : ${list4} = [u'1', u'2', u'3']
20171030 10:09:43.446 : INFO : ${list3} = [u'a', u'b', u'c']
20171030 10:09:43.446 : INFO : @{A} = [ 1 | 2 | 3 ]
20171030 10:09:43.446 : INFO : @{B} = [ a | b | c ]
20171030 10:09:43.446 : INFO : @{C} = [ [u'1', u'2', u'3'] ]
20171030 10:09:43.446 : INFO : @{D} = [ [u'a', u'b', u'c'] ]
20171030 10:09:43.461 : INFO : 3
20171030 10:09:43.461 : INFO : Z
20171030 10:09:43.461 : INFO : 3
20171030 10:09:43.461 : INFO : Z
20171030 10:09:43.461 : INFO : ----------------------
20171030 10:09:43.461 : INFO : 3
20171030 10:09:43.461 : INFO : c