FileNotFoundError: [WinError 2] python 3.4 [英] FileNotFoundError: [WinError 2] python 3.4

问题描述

我正在尝试通过 python 通过 Plink 自动接受 ssh-rsa 密钥.但我收到错误

下面是我的代码

def __init__(self, ipaddress, option, user, password, command=""):"""构造函数创建与主机的连接."""self.ipaddress = ipaddressself.option = 选项self.user = 用户self.password = 密码self.command = 命令self.key()定义键(自己):命令1 = ['回声'，'y']process1 = subprocess.Popen(command1,stdout=subprocess.PIPE)command2 = ['plink', '-ssh', self.option, '-pw', self.password, '%s@%s'%(self.user, self.ipaddress), '\"exit\"']process2 = subprocess.Popen(command2,stdin=process1.stdout,stdout=subprocess.PIPE)def sendSingleCommand(self, command):"""建立一个设备的 ssh 连接，发送命令，关闭连接并返回 stdout,stderr 元组."""尝试:打印(plink -ssh %s -pw %s %s@%s %s"\% (self.option, self.password, self.user, self.ipaddress, command))self.process = subprocess.Popen("plink -ssh %s -pw %s %s@%s %s" \% (self.option, self.password, self.user, self.ipaddress, command), shell=False, stdin=subprocess.PIPE, stdout=subprocess.PIPE)

但是我遇到了线程 process1 的 Key() 函数错误.以下是错误:

文件C:\Python34\lib\subprocess.py"，第 859 行，在 __init__ 中错误:restore_signals、start_new_session)错误:文件C:\Python34\lib\subprocess.py"，第 1112 行，在 _execute_child错误:启动信息)错误:FileNotFoundError:[WinError 2] 系统找不到指定的文件

解决方案

在 Windows 中，要在子进程中使用 echo，您需要使用 shell=True .这是因为 echo 不是单独的可执行文件，而是 Windows 命令行的内置命令.示例 -

process1 = subprocess.Popen(command1,stdout=subprocess.PIPE,shell=True)

另外，请注意，您应该只在绝对必要时使用 shell=True(在这种情况下，在子进程的窗口中使用 echo).><小时>

尽管作为一个整体，您可以使用 PIPE 和 .communicate() 直接将 y 传递给您的第二个命令.示例 -

def key(self):command2 = ['plink', '-ssh', self.option, '-pw', self.password, '%s@%s'%(self.user, self.ipaddress), '\"exit\"']process2 = subprocess.Popen(command2,stdin=subprocess.PIPE,stdout=subprocess.PIPE)输出，_ = process.communicate(b'y')

I am trying to auto accept ssh-rsa key through Plink via python. But I am getting error

Below is my code

def __init__(self, ipaddress, option, user, password, command=""):
    """
    Constructor creates the connection to the host.
    """
    self.ipaddress = ipaddress
    self.option = option
    self.user = user
    self.password = password
    self.command = command
    self.key()

def key(self):
    command1 = ['echo', 'y']
    process1 = subprocess.Popen(command1,stdout=subprocess.PIPE)
    command2 = ['plink', '-ssh', self.option, '-pw', self.password, '%s@%s'%(self.user, self.ipaddress), '\"exit\"']
    process2 = subprocess.Popen(command2,stdin=process1.stdout,stdout=subprocess.PIPE)

def sendSingleCommand(self, command):
    """
    Set up a ssh connection a device, send command, close connection and return stdout,stderr tuple.
    """
    try:
        print("plink -ssh %s -pw %s %s@%s %s" \
                % (self.option, self.password, self.user, self.ipaddress, command))
        self.process = subprocess.Popen("plink -ssh %s -pw %s %s@%s %s" \
                % (self.option, self.password, self.user, self.ipaddress, command), shell=False, stdin=subprocess.PIPE, stdout=subprocess.PIPE)

But i am getting error for Key() function for the line process1. Below is the error :

File "C:\Python34\lib\subprocess.py", line 859, in __init__  
Error:     restore_signals, start_new_session)  
Error:   File "C:\Python34\lib\subprocess.py", line 1112, in _execute_child  
Error:     startupinfo)  
Error: FileNotFoundError: [WinError 2] The system cannot find the file specified  

解决方案

In Windows , to use echo in subprocess, you would need to use shell=True . This is because echo is not a separate executable, but rather a built-in command for the windows command line. Example -

process1 = subprocess.Popen(command1,stdout=subprocess.PIPE,shell=True)

Also, please do note, you should only use shell=True when absolutely necessary (as in this case , to use echo in windows in subprocess).

---

Though as a whole, you can directly pass in y to your second command using PIPE and .communicate(). Example -

def key(self):
    command2 = ['plink', '-ssh', self.option, '-pw', self.password, '%s@%s'%(self.user, self.ipaddress), '\"exit\"']
    process2 = subprocess.Popen(command2,stdin=subprocess.PIPE,stdout=subprocess.PIPE)
    output, _ = process.communicate(b'y')

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