如何使用python3从文本文件中提取两行之间的行？

Question

I have this type of data

FIRSTX    300.0000
LASTX     700.0000
NPOINTS      801
FIRSTY    1877.68506
MAXY      1877.68506
MINY         4.84203
XYDATA
300.0000        1877.69
300.5000        1284.56
301.0000        882.726
301.5000        585.898
302.0000        382.904
302.5000        261.405
303.0000        189.027
303.5000        146.89

##### Extended Information
[Comments]
Sample name     C7 VS POLY(DA)(DT)_BLANK

I want only this part

300.0000        1877.69
300.5000        1284.56
301.0000        882.726
301.5000        585.898
302.0000        382.904
302.5000        261.405
303.0000        189.027
303.5000        146.89

How can I do this with Python3?

Answer 1

this is the regex - \d{3}\.\d{4}\s{8}\d{1,4}\.\d{1,3}

import re
regex = "\d{3}\.\d{4}\s{8}\d{1,4}\.\d{1,3}"
data = """
FIRSTX    300.0000
LASTX     700.0000
NPOINTS      801
FIRSTY    1877.68506
MAXY      1877.68506
MINY         4.84203
XYDATA
300.0000        1877.69
300.5000        1284.56
301.0000        882.726
301.5000        585.898
302.0000        382.904
302.5000        261.405
303.0000        189.027
303.5000        146.89

##### Extended Information
[Comments]
Sample name     C7 VS POLY(DA)(DT)_BLANK
"""
for matches in re.findall(regex, data):
    print(matches)

the output wiil be:

300.0000        1877.69
300.5000        1284.56
301.0000        882.726
301.5000        585.898
302.0000        382.904
302.5000        261.405
303.0000        189.027
303.5000        146.89