记录一下python正则表达式过滤方式

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hY3ku7vkvZXnqbrnmb3lrZfnrKbvvIzljIXmi6znqbrmoLzjgIHliLbooajnrKbjgIHmjaLpobXnrKbnrYnnrYnjgILnrYnku7fkuo4gWyBcZlxuXHJcdFx2XeOAggpcUyAJ5Yy56YWN5Lu75L2V6Z2e56m655m95a2X56ym44CC562J5Lu35LqOIFteIFxmXG5cclx0XHZd44CCClx3CeWMuemFjeWMheaLrOS4i+WIkue6v+eahOS7u+S9leWNleivjeWtl+espuOAguetieS7t+S6jidbQS1aYS16MC05X10n44CCClxXCeWMuemFjeS7u+S9lemdnuWNleivjeWtl+espuOAguetieS7t+S6jiAnW15BLVphLXowLTlfXSfjgII=