循環迭代 - 重寫輸出文件

Question

我目前有這段代碼可以成功讀取來自兩個源的信息並將它們正確地格式化爲輸出文件\ _spec_final.t15。目前信息打印一個接一個，但我希望它打印一行/文件的信息，然後用下一次迭代覆蓋它。有人知道怎麼做這個嗎？

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

打開，你在讀infofile後寫入文件。

每次迭代它都會打開並覆蓋\_spec_final.t15。

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