如何以编程方式重新排列文本文件值

Question

Problem statement:

Class    Confidence    Xmin   Ymin    Xmax  Ymax
9        0.9745781     45     8        39   49
6        0.9401682     1      1        79   52
3        0.0167890     34     7        90   45

This value will have in my file. I want to rearrange all data such as: I want to compare Xmin value. If Xmin value is small then Xmin line will write in the Top i mean ascending order.

Expected output:

Class    Confidence    Xmin   Ymin    Xmax  Ymax
6        0.9401682     1      1        79   52
3        0.0167890     34     7        90   45
9        0.9745781     45     8        39   49

How can I do this programmatically using python? All data have text file and after doing this I want to save value same format in text file.

Answer 1

If file.txt contains:

Class    Confidence    Xmin   Ymin    Xmax  Ymax
9        0.9745781     45     8        39   49
6        0.9401682     1      1        79   52
3        0.0167890     34     7        90   45

Then running this script:

with open('file.txt', 'r') as f_in, \
    open('file_out.txt', 'w') as f_out:
    f_out.write(next(f_in))  # skip the header, write it directly to output file
    f_out.write('\n'.join(line.strip() for line in sorted(f_in, key=lambda k: int(k.split()[2]))))

will produce file_out.txt :

Class    Confidence    Xmin   Ymin    Xmax  Ymax
6        0.9401682     1      1        79   52
3        0.0167890     34     7        90   45
9        0.9745781     45     8        39   49