Question

我只能将感兴趣的行写入新文件时遇到问题。

f1文件由具有以下内容的原始文件组成：

line =
'Raw,512561008,58913000000,,,-1226439751087359050,0.0,6.748478024207768,,,0,14,0.0,16397,510195928489024,10,33.76073455810547,91.65148631320972,0.0037611895240843296,1,6907.217495186118,0.0018805947620421648,1.56109798E9,,,,0,,5,,1.56109798E9'

我有兴趣写一些在索引[-15：-14]之间没有'5'作为值的行。我已经编写了以下函数，但是当我运行它时，新文件仍然包含不需要的行。如果有人能指出我在做什么错，我将不胜感激。谢谢！。

def CleanGNSSLogger(ASCIIfileName,filterStr=None):
   try:
      with open(ASCIIfileName, 'r') as f1, open(ASCIIfileName[:-4]+'_clean'+ASCIIfileName[-4:],'w') as f2:
          for line in f1:
              if line[-15:-14] != '5':
                  f2.write(line)
   except IOError as e:
      print ('Operation failed: %s' % e.strerror)

   return

Answer 1

尝试

if "5" not in line[-15:-14]:

看看是否可行。

Answer 2

我会做这样的事情，因此您要确保可以可靠地访问您感兴趣的值（5）：

SOME_NAME_INDEX = 29 # or the correct location of the value of interest

def CleanGNSSLogger(ASCIIfileName,filterStr=None):
    try:
        with open(ASCIIfileName, 'r') as f1, open(ASCIIfileName[:-4]+'_clean'+ASCIIfileName[-4:],'w') as f2:
            for line in f1:
                values = line.split(",")
                if values[SOME_NAME_INDEX] != '5':
                    f2.write(line)
    except IOError as e:
        print ('Operation failed: %s' % e.strerror)

只写文件a到文件b的特定行

2 个答案: