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The data file

.... # unknow linestag 134 345 256 2345 234othertag

The matlab solution

%matlab % to reading the data from the above format file % if using matlab, it is easy fid = fopen(filename); tag1 = 'tag'; while 1strline = fgetl(fid);if strcmp('tag',strline) == 1result = fscanf(fid,'%f',[1,inf]);fclose(fid);break;end end

The function "fscanf" makes the process very easy.

Today, I want to use python to realize the same function, but a problem was met: how to read the data in one time?

My python solution

The first time

filename = 'test.txt' startrecord = False result = [] with open(filename) as f:for line in f:line = line.strip()if line.startswith('tag'):startrecord = Truecontinueif not line:startrecord = Falseif startrecord:result.append(float(line)) f.close() print result[345.0, 2345.0, 234.0]

The new way

Wait for other resolutions

轉(zhuǎn)載于:https://my.oschina.net/grassyue/blog/181154

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