循环迭代 - 重写输出文件

Question

我目前有这段代码可以成功读取来自两个源的信息并将它们正确地格式化为输出文件\ _spec_final.t15。目前信息打印一个接一个，但我希望它打印一行/文件的信息，然后用下一次迭代覆盖它。有人知道怎么做这个吗？

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

打开，你在读infofile后写入文件。

每次迭代它都会打开并覆盖\_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: