使用 python 替换两个子字符串之间的字符串

Question

这是我的问题：文件中有十个不同的标志，我需要替换不同 flags.For 示例之间的字符串，文件内容：

content of the file
...
...
...
FIRSTSTART
 111.467, 0.0, 0.0, 
    0.0, 0.0, 0.000, 0.000, 1.0, 3,
    0.0, 0.0, 0.960, 0.001, 1.0, 4,
FIRSTEND
SECONDSTART
 111.467, 0.0, 0.0, 
    0.0, 0.0, 0.000, 0.000, 1.0, 4,
    0.0, 0.0, 0.960, 0.001, 0.5, 4,
SECONDEND
THIRDSTART
 2.765, 0.0, 0.0,
   0.0, 0.0, 0.000, 0.000, 1.0, 2,
   0.0, 0.0, 1.470, 0.003, 4.0, 3,
THIRDEND
FORTHSTART
 2.765, 0.0, 0.0,
  0.0, 0.0, 0.000, 0.0000, 1.0, 1,
  0.0, 0.0, 2.350, 0.0040, 6.0, 3,
FORTHEND
FIFTHSTART
 2.765, 0.0, 0.0,
   0.0, 0.0, 0.000, 0.0000, 1.0, 3,
   0.0, 0.0, 2.410, 0.0040, 6.0, 3,
FIFTHEND
SIXTHSTART
 2.765, 0.0, 0.0,
   0.0, 0.0, 0.000, 0.0000, 1.0, 3,
   0.0, 0.0, 3.330, 0.0100, 12.0, 3,
SIXTHEND
SEVENTHSTART
 2.765, 0.0, 0.0,
  0.0, 0.0, 0.000, 0.0000,1.0, 3,
  0.0, 0.0, 3.960, 0.0100, 12.0, 3,
SEVENTHEND
EIGTHSTART
 40.00, 0.0, 0.0,
  0.0, 0.0, 0.000, 0.0000,1.0, 3,
  0.0, 0.0, 2.890, 0.0190, 1.717, 3,
EIGTHEND
NINETHSTART
 2.765, 0.0, 0.0,
   0.0, 0.0, 0.000, 0.0000, 1.0, 1,
   0.0, 0.0, 3.64, 0.0030, 0.5, 2,
NINETHEND
TENTHSTART
 2.765, 0.0, 0.0,
   0.0, 0.0, 0.000, 0.0000, 1.0, 1,
   0.0, 0.0, 4.39, 0.018, 10.0, 3,
TENTHEND 
...
...
...
content of the file...
...

我需要替换每个 "START" 和 "END" 之间的字符串 flags.Result 我想要的是：

content of the file
    ...
    ...
    ...
    FIRSTSTART
    1a
    FIRSTEND
    SECONDSTART
    2b
    SECONDEND
    THIRDSTART
    3c
    THIRDEND
    FORTHSTART
    4d
    FORTHEND
    FIFTHSTART
    5e
    FIFTHEND
    SIXTHSTART
    6f
    SIXTHEND
    SEVENTHSTART
    7g
    SEVENTHEND
    EIGTHSTART
    8h
    EIGTHEND
    NINETHSTART
    9i
    NINETHEND
    TENTHSTART
    10j
    TENTHEND 
    ...
    ...
    ...
    content of the file...
    ...

那么，我该如何处理这个文件。

Answer 1

在python中可以这样实现：（data.txt是你的内容文件）

import re

with open ("data.txt", "r") as myfile:
    data = myfile.read()

dict = {"FIRSTSTART(.+)FIRSTEND": "FIRSTSTART\n1a\nFIRSTEND", "SECONDSTART(.+)SECONDEND": "SECONDSTART\n2b\nSECONDEND",
        "THIRDSTART(.+)THIRDEND": "THIRDSTART\n3c\nTHIRDEND", "FORTHSTART(.+)FORTHEND": "FORTHSTART\n4d\nFORTHEND",
        "FIFTHSTART(.+)FIFTHEND": "FIFTHSTART\n5e\nFIFTHEND", "SIXTHSTART(.+)SIXTHEND": "SIXTHSTART\n6f\nSIXTHEND",
        "SEVENTHSTART(.+)SEVENTHEND": "SEVENTHSTART\n7g\nSEVENTHEND", "EIGTHSTART(.+)EIGTHEND": "EIGTHSTART\n8h\nEIGTHEND",
        "NINETHSTART(.+)NINETHEND": "NINETHSTART\n9i\nNINETHEND", "TENTHSTART(.+)TENTHEND": "TENTHSTART\n10j\nTENTHEND"
        }

for key, value in dict.iteritems():
    re_comp = re.compile(key, re.DOTALL)
    data = re_comp.sub(value, data)

print data

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