python通用的列表解析结构

通用的列表解析结构如下：

[expression for target1 in iterable1 [if condition1]

? ?for target1 in iterable2 [if condition2]

? ?for target1 in iterable3 [if condition3]

? ?for target1 in iterable4 [if condition4]

? ?... .... ... .... ... ... ... ... ... ... ... ... ... ... .

??for targetN in iterableN [if conditionN]]

例如：

?

print rs == rx #True