记录一下python正则表达式过滤方式

PHA+5Lul5LiL5Li66I+c6bif5pWZ56iL55qE5YaF5a6577yM5LuF5L2c5Li656yU6K6w5pS+5Zyo6L+Z6YeM77yM5b6F5ZCO57ut5LyY5YyW5o+Q5Y+WPGJyPjEu6L+H5ruk5YWz6ZSu6K+N77yI5q2j5YiZ6KGo6L6+5byP5piv6YCa6L+HQVNDSUnnvJbnoIHmnaXlrp7njrDnmoTvvInvvJo8YnI+5Y+q5YWB6K6455So5oi35ZCN5YyF5ZCr5a2X56ym44CB5pWw5a2X44CB5LiL5YiS57q/5ZKM6L+e5o6l5a2X56ymKC0p77yM5bm26K6+572u55So5oi35ZCN55qE6ZW/5bqm77yM5oiR5Lus5bCx5Y+v5Lul5L2/55So5Lul5LiL5q2j5YiZ6KGo6L6+5byP5p2l6K6+5a6aOjxicj5eW2EtekEtWjAtOV8tXXs0LDEwfSQ8YnI+XuihqOekuuW8gOWni+eahOS9jee9ru+8jCTooajnpLrnu5PmnZ/nmoTkvY3nva7vvIw8YnI+Mi7kvb/nlKjliLDnmoTlh73mlbDvvJo8YnI+IHJlLnNlYXJjaOWSjHJlLm1hdGNo77yaPGJyPiAgIHJlLm1hdGNoKHBhdHRlcm4sIHN0cmluZywgZmxhZ3M9MCnlsJ3or5Xku47lrZfnrKbkuLLnmoTotbflp4vkvY3nva7ljLnphY3kuIDkuKrmqKHlvI/vvIzljLnphY3miJDlip9yZS5tYXRjaOaWueazlei/lOWbnuS4gOS4quWMuemFjeeahOWvueixoe+8jOWQpuWImei/lOWbnk5vbmXjgILlhbbkuK3vvIznrKzkuIDkuKrlj4LmlbDmmK/mraPliJnooajovr7lvI/vvIznrKwy5Liq5Y+C5pWw5piv6KaB5Yy56YWN55qE5a2X56ym5Liy77yM56ysM+S4quWPguaVsOaYr+agh+W/l+S9je+8jOeUqOS6juaOp+WItuato+WImeihqOi+vuW8j+eahOWMuemFjeaWueW8j++8jOWmgu+8muaYr+WQpuWMuuWIhuWkp+Wwj+WGme+8jOWkmuihjOWMuemFjeetieetieOAguivpeWHveaVsOWPquWMuemFjeW8gOWni++8jOWmguaenOW8gOWni+S4jeespuWQiOWImeebtOaOpei/lOWbnm5vbmXjgII8YnI+ICAgcmUuc2VhcmNoKHBhdHRlcm4sIHN0cmluZywgZmxhZ3M9MCnmiavmj4/mlbTkuKrlrZfnrKbkuLLvvIzlubbov5Tlm57nrKzkuIDkuKrljLnphY3nmoTlgLzjgILlj6/ku6Xkvb/nlKhncm91cChudW0pIOaIliBncm91cHMoKSDljLnphY3lr7nosaHlh73mlbDmnaXojrflj5bljLnphY3ooajovr7lvI/jgII8L3A+CjxwPiBQeXRob24g55qEcmXmqKHlnZfmj5DkvpvkuoZyZS5zdWLnlKjkuo7mm7/mjaLlrZfnrKbkuLLkuK3nmoTljLnphY3pobnjgII8YnI+ICAg6K+t5rOV77yacmUuc3ViKHBhdHRlcm4sIHJlcGwsIHN0cmluZywgY291bnQ9MCwgZmxhZ3M9MCk8YnI+ICAg5Y+C5pWw77yaPGJyPiAgICBwYXR0ZXJuIDog5q2j5YiZ5Lit55qE5qih5byP5a2X56ym5Liy44CCPGJyPiAgICByZXBsIDog5pu/5o2i55qE5a2X56ym5Liy77yM5Lmf5Y+v5Li65LiA5Liq5Ye95pWw44CCPGJyPiAgICBzdHJpbmcgOiDopoHooqvmn6Xmib7mm7/mjaLnmoTljp/lp4vlrZfnrKbkuLLjgII8YnI+ICAgIGNvdW50IDog5qih5byP5Yy56YWN5ZCO5pu/5o2i55qE5pyA5aSn5qyh5pWw77yM6buY6K6kIDAg6KGo56S65pu/5o2i5omA5pyJ55qE5Yy56YWN44CCPGJyPiAgICBmbGFncyA6IOe8luivkeaXtueUqOeahOWMuemFjeaooeW8j++8jOaVsOWtl+W9ouW8j+OAgjxicj4gICDliY3kuInkuKrkuLrlv4XpgInlj4LmlbDvvIzlkI7kuKTkuKrkuLrlj6/pgInlj4LmlbDjgII8YnI+ICBmaW5kYWxs5Yy56YWN5omA5pyJ77yM5bm26L+U5Zue5LiA5Liq5YiX6KGo77yM5aaC5p6c5pyJ5aSa5Liq5Yy56YWN5qih5byP77yM5YiZ6L+U5Zue5YWD57uE5YiX6KGo77yM5aaC5p6c5rKh5pyJ5om+5Yiw5Yy56YWN55qE77yM5YiZ6L+U5Zue56m65YiX6KGo44CCPGJyPiAgIOivreazleagvOW8j++8mnJlLmZpbmRhbGwocGF0dGVybiwgc3RyaW5nLCBmbGFncz0wKeaIlnBhdHRlcm4uZmluZGFsbChzdHJpbmdbLCBwb3NbLCBlbmRwb3NdXSk8YnI+ICAg5Y+C5pWw77yaPGJyPiAgICBwYXR0ZXJuIOWMuemFjeaooeW8j+OAgjxicj4gICAgc3RyaW5nIOW+heWMuemFjeeahOWtl+espuS4suOAgjxicj4gICAgcG9zIOWPr+mAieWPguaVsO+8jOaMh+WumuWtl+espuS4sueahOi1t+Wni+S9jee9ru+8jOm7mOiupOS4uiAw44CCPGJyPiAgICBlbmRwb3Mg5Y+v6YCJ5Y+C5pWw77yM5oyH5a6a5a2X56ym5Liy55qE57uT5p2f5L2N572u77yM6buY6K6k5Li65a2X56ym5Liy55qE6ZW/5bqm44CCPGJyPiAgICDkv67ppbDnrKbooqvmjIflrprkuLrkuIDkuKrlj6/pgInnmoTmoIflv5fjgILlpJrkuKrmoIflv5flj6/ku6XpgJrov4fmjInkvY0gT1IofCkg5a6D5Lus5p2l5oyH5a6a44CC5aaCIHJlLkkgfCByZS5NIOiiq+iuvue9ruaIkCBJIOWSjCBNIOagh+W/l++8mjxicj4zLuW4uOeUqOeahOaWueW8j++8mjxicj7lrZfnrKbljLnphY3vvJpQeXRob24g6KGo56S65Yy56YWN4oCcUHl0aG9u4oCd5a2X56ym44CCPGJyPiAgLiAgICDljLnphY3pmaQg4oCcXG7igJ0g5LmL5aSW55qE5Lu75L2V5Y2V5Liq5a2X56ym44CC6KaB5Yy56YWN5YyF5ousIOKAmFxu4oCZIOWcqOWGheeahOS7u+S9leWtl+espu+8jOivt+S9v+eUqOixoSDigJhbLlxuXeKAmSDnmoTmqKHlvI/jgII8YnI+ICBcZCAgICDljLnphY3kuIDkuKrmlbDlrZflrZfnrKbjgILnrYnku7fkuo4gWzAtOV3jgII8YnI+ICBcRCAgICAg5Yy56YWN5LiA5Liq6Z2e5pWw5a2X5a2X56ym44CC562J5Lu35LqOIFteMC05XeOAgjxicj4gIFxzICAgIOWMuemFjeS7u+S9leepuueZveWtl+espu+8jOWMheaLrOepuuagvOOAgeWItuihqOespuOAgeaNoumhteespuetieetieOAguetieS7t+S6jiBbIFxmXG5cclx0XHZd44CCPGJyPiAgXFMgICAgIOWMuemFjeS7u+S9lemdnuepuueZveWtl+espuOAguetieS7t+S6jiBbXiBcZlxuXHJcdFx2XeOAgjxicj4gIFx3ICAgIOWMuemFjeWMheaLrOS4i+WIkue6v+eahOS7u+S9leWNleivjeWtl+espuOAguetieS7t+S6juKAmVtBLVphLXowLTk8ZW0+XeKAmeOAgjxicj4gIFxXICAgIOWMuemFjeS7u+S9lemdnuWNleivjeWtl+espuOAguetieS7t+S6jiDigJhbXkEtWmEtejAtOTwvZW0+XeKAmeOAgjwvcD4KPHA+ICDmgLvnu5PvvJpweXRob27nmoRyZS5tYXRjaOWHveaVsOS4jlBIUOeahHByZWdfbWF0Y2jlh73mlbDmnInkupvnsbvkvLzvvIxyZS5zZWFyY2jlh73mlbDkuI5QSFDnmoRwcmVnX21hdGNoX2FsbOWHveaVsOexu+S8vOOAguiAjHJlLnN1YuWHveaVsOS4jlBIUOeahHByZWdfcmVwbGFjZeWHveaVsOavlOi+g+exu+S8vOOAgjwvcD4KPHA+NC7lrp7kvovvvJo8YnI+IOato+WImeihqOi+vuW8j+WunuS+izxicj7lrZfnrKbljLnphY08YnI+5a6e5L6LICAgIOaPj+i/sDxicj5weXRob24gICAg5Yy56YWNIOKAnHB5dGhvbuKAnS48YnI+5a2X56ym57G7PGJyPuWunuS+iyAgICDmj4/ov7A8YnI+cHl0aG9uICAgICDljLnphY0g4oCcUHl0aG9u4oCdIOaIliDigJxweXRob27igJ08YnI+cnViW3llXSAgICDljLnphY0g4oCccnVieeKAnSDmiJYg4oCccnViZeKAnTxicj5bYWVpb3VdICAgIOWMuemFjeS4reaLrOWPt+WGheeahOS7u+aEj+S4gOS4quWtl+avjTxicj5bMC05XSAgICDljLnphY3ku7vkvZXmlbDlrZfjgILnsbvkvLzkuo4gWzAxMjM0NTY3ODldPGJyPlthLXpdICAgIOWMuemFjeS7u+S9leWwj+WGmeWtl+avjTxicj5bQS1aXSAgICDljLnphY3ku7vkvZXlpKflhpnlrZfmr408YnI+W2EtekEtWjAtOV0gICAg5Yy56YWN5Lu75L2V5a2X5q+N5Y+K5pWw5a2XPGJyPlteYWVpb3VdICAgIOmZpOS6hmFlaW915a2X5q+N5Lul5aSW55qE5omA5pyJ5a2X56ymPGJyPlteMC05XSAgICDljLnphY3pmaTkuobmlbDlrZflpJbnmoTlrZfnrKY8YnI+54m55q6K5a2X56ym57G7PGJyPuWunuS+iyAgICDmj4/ov7A8YnI+LiAgICDljLnphY3pmaQg4oCcXG7igJ0g5LmL5aSW55qE5Lu75L2V5Y2V5Liq5a2X56ym44CC6KaB5Yy56YWN5YyF5ousIOKAmFxu4oCZIOWcqOWGheeahOS7u+S9leWtl+espu+8jOivt+S9v+eUqOixoSDigJhbLlxuXeKAmSDnmoTmqKHlvI/jgII8YnI+XGQgICAg5Yy56YWN5LiA5Liq5pWw5a2X5a2X56ym44CC562J5Lu35LqOIFswLTld44CCPGJyPlxEICAgICDljLnphY3kuIDkuKrpnZ7mlbDlrZflrZfnrKbjgILnrYnku7fkuo4gW14wLTld44CCPGJyPlxzICAgIOWMuemFjeS7u+S9leepuueZveWtl+espu+8jOWMheaLrOepuuagvOOAgeWItuihqOespuOAgeaNoumhteespuetieetieOAguetieS7t+S6jiBbIFxmXG5cclx0XHZd44CCPGJyPlxTICAgICDljLnphY3ku7vkvZXpnZ7nqbrnmb3lrZfnrKbjgILnrYnku7fkuo4gW14gXGZcblxyXHRcdl3jgII8YnI+XHcgICAg5Yy56YWN5YyF5ous5LiL5YiS57q/55qE5Lu75L2V5Y2V6K+N5a2X56ym44CC562J5Lu35LqO4oCZW0EtWmEtejAtOTxlbT5d4oCZ44CCPGJyPlxXICAgIOWMuemFjeS7u+S9lemdnuWNleivjeWtl+espuOAguetieS7t+S6jiDigJhbXkEtWmEtejAtOTwvZW0+XeKAmeOAgjwvcD4=