python - 正则表达式用多行Python匹配和替换字符串

Question

我需要帮助来匹配 2 个字符串并替换为空字符串“”。感谢您的帮助，因为我在 Python 和编码方面仍然是新手:

crypto pki certificate chain TP-self-signed-1357590403
  +30820330 30820218 A0030201 02020101 300D0609 2A864886 F70D0101 05050030
  +31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
  +69666963 6174652D 31333537 35393034 3033301E 170D3139 30313234 31353436
  +34345A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649
  +4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D31 33353735
  +39303430 33308201 22300D06 092A8648 86F70D01 01010500 0382010F 00308201
  +0A028201 0100E69D C133454E 401E763A 7686E453 5D58020D 0E6E122F A0F19E15
  +E0975148 666110BD C1F09B86 CB701C20 EF85E024 F759A921 D11DA10C A13BA3BD
  +20006387 917287CE EA0CFDDC 2FA5DD07 E5B200F4 108CACA1 DCEF0E4E EEE908ED
  +2ACD693B FC90A24F 9F865CB9 859FEFB0 EB8904D4 8FA83D29 E93B892F 32F3EC7D
  +EAA2850E 1793BBCE 86EA47B2 15645634 D81EA89C 1C2BC092 766DF58F 0B289A82
  +0C92E551 7AA9588E F5B41A41 6DB4C785 101E674D BBBCFB42 9F4F9A25 70389515
  +D1C07E2F 18C0557D 95283E90 3CCD2966 5EBF5668 A6B0B847 0B278906 E5BFA668
  +EFBE938A BE70C4C0 1A8D7218 71463EA5 49540A45 DF307B4C 459E657D C039BB68
  +F047B0B2 2F250203 010001A3 53305130 0F060355 1D130101 FF040530 030101FF
  +301F0603 551D2304 18301680 141FADF3 CC2C2293 810EDAA8 9E55327C D2B7D88A
  +88301D06 03551D0E 04160414 1FADF3CC 2C229381 0EDAA89E 55327CD2 B7D88A88
  +300D0609 2A864886 F70D0101 05050003 82010100 91E63F44 376F91C1 C50C08E4
  +B29B902B B1BC7831 C5607897 030835A6 108FC1F2 6F3DEE23 EF3E8FFF 81A121B5
  +26596004 F8F61DFD 1B603C5D 42D850E6 439C7CAE BFC285AE 3FD83870 125594C0
  +51EAAC09 BF42446F C6399B90 D0E10ACA B208819B 645BECE5 DBDDA9AD EBA1FCD9
  +2B14D0DE AB2AC1BF FF064076 ADBB4540 17AB77A4 C6B0DA3B 1BC0F5B8 44030E7B
  +27318CEE 14C90739 DD8684A8 9346EEC1 3F4958EF 835BA822 F58523C9 E9F83105
  +D3E68700 20DAFC5E B1B8CF5B BAC5CEB3 00321088 43125173 51FC8006 270731E6
  +0E0C6183 68BABA99 BD9F4F28 1EDA82D4 F00F1359 F30B6501 BC468C89 49111AB2
  +CBDE5A9D DB8DB33A 45FE6C96 7D49A70F 4C299618

从第一行开始总是有 27 行

第二个是:

crypto pki certificate chain TP-self-signed-1357590403
 -certificate self-signed 01 nvram:IOS-Self-Sig#1.cer

Answer 1

如果你想匹配包括下一行在内的行，你可以匹配所有行并使用否定前瞻来断言下一行不以加密开头。

然后匹配换行符和密码直到行尾:

^crypto pki certificate chain TP-self-signed-.*(?:\n(?!crypto).*)*\ncrypto.*

Regex demo

如果起始行应该与末尾的行相同，您可以为第一行使用反向引用的捕获组:

^(crypto pki certificate chain TP-self-signed-.*)(?:\n(?!\1).*)*\n\1

Regex demo

你的代码可能看起来像

pattern = r'^(crypto pki certificate chain TP-self-signed-.*)(?:\n(?!\1).*)*\n\1'
df=re.sub(pattern, '' , file, 0, re.MULTILINE)