循环迭代-重写输出文件

Question

I currently have this code that successfully reads information from two sources and correctly formats them into an output file \\_spec_final.t15. Currently the information prints one after another, but I would like it to print the information for one line/file then overwrite it with the next iteration. Does anybody know how to do this?

with open('\\_spec_final.t15', 'w') as f:
    with open('info.txt', 'rt') as infofile:
        for count, line in enumerate(infofile): 
            print count
            lat = float(line[88:94]) 
            lon = float(line[119:127])
            year = int(line[190:194])
            month = int(line[195:197])
            day = int(line[198:200])
            hour = int(line[201:203])
            minute = int(line[204:206])
            second = int(line[207:209])
            dur = float(line[302:315])
            numpoints = float(line[655:660])
            fov = line[481:497] # field of view?
            sza = float(line[418:426])
            snr = 0.0000 
            roe = 6396.2 
            res = 0.5000
            lowwav = float(lowwav)
            highwav = float(highwav)
            spacebw = (highwav - lowwav)/ numpoints

            d = datetime.datetime(year, month, day, hour, minute, second)
            f.write('{:>12.5f}{:>12.5f}{:>12.5f}{:>12.5f}{:>8.1f}'.format(sza,roe,lat,lon,snr)) # line 1
            f.write("\n")
            f.write('{:>10d}{:>5d}{:>5d}{:>5d}{:>5d}{:>5d}'.format(year,month,day,hour,minute,second)) # line 2
            f.write("\n")
            f.write( ('{:%Y/%m/%d %H:%M:%S}'.format(d)) + "UT Solar Azimuth:" + ('{:>6.3f}'.format(sza)) + " Resolution:" + ('{:>6.4f}'.format(res)) + " Duration:" + ('{:>6.2f}'.format(dur))) # line 3
            f.write("\n")
            f.write('{:>21.13f}{:>26.13f}{:>24.17e}{:>12f}'.format(lowwav,highwav,spacebw,numpoints)) # line 4
            f.write("\n")

            with open(files[count], 'r') as g:
                for line in g:
                    wave_no, intensity = [float(item) for item in line.split()]
                    if lowwav <= wave_no <= highwav:
                        f.write(str(intensity) + '\n')

Answer 1

Open and write to the file after you read in infofile .

It will open and overwrite \\_spec_final.t15 with each iteration.

with open('info.txt', 'rt') as infofile:   
    for count, line in enumerate(infofile):
        print count
        with open('\\_spec_final.t15', 'w') as f: