如果语句在使用 nmap 时不起作用 Python

Question

我在让 if 语句正常工作时遇到了一些麻烦。在 iplist.txt 的末尾有一个我不想运行的空行，但由于某种原因，它仍在运行。我尝试删除文件的最后一行，但它只删除最后一个合法行而不是空行，我什至尝试删除空格、空行和空行，但它仍然会与一行一起运行。最奇怪的部分是空白在 if 块和 else 块中都运行。 with open ("iplist.txt", "r") as file:     filecontents = file.read()     for line in filecontents.split('\n'):      filename = (line) + ".txt "      command = "nmap -O -oG " + ".\\ips\\" + (filename) + (line)      print(command)      print(filename)      strlen = int (len(filename))      print(strlen)      compareline = line[:4]      print(compareline)      if compareline == beginline: #beginline is declared as 10.9 earlier in the file       print("Testing 1..2...")       os.system(command)       filenameforos = (line + ".txt")       #detailedosdetection = open(filenameforos)       #next(filecontents)      else:       print("Testing...")       del line       #next(StopIteration)这里是iplist.txt的内容10.9.10.3810.9.10.4510.9.11.10#extra line编辑我试过了，但它没有运行循环，我确定我做错了。with open ("iplist.txt", "r") as file: filecontents = file.read() lines = file.readlines() lines = [x.strip() for x in lines] print("Creating list") for line in lines:  filename = (line) + ".txt "  command = "nmap -O -oG " + ".\\ips\\" + (filename) + (line)  print(command)  print(filename)  strlen = int (len(filename))  print(strlen)  compareline = line[:4]  print(compareline)  if compareline == beginline: #beginline is declared as 10.9 earlier in the file   print("Testing 1..2...")   os.system(command)   filenameforos = (line + ".txt")   #detailedosdetection = open(filenameforos)   #next(filecontents)  else:   print("Testing...")   del line   #next(StopIteration)

Answer 1

Python 有一种方法可以读取单独的行。尝试

lines = file.readlines()

lines = [x.strip() for x in lines] #To remove unneccesary white spaces and "\n"

而不是在“\n”上拆分文件