Python Paramiko，尝试连接时关闭属性错误“ Nonetype”

Question

I'm trying to connect through Paramiko to an external SFTP and passing an encrypted config file for the credentials. When attempting to connect with the following, I get an error for the exception client.close that states AttributeError: 'Nonetype' object has not attribute 'close':

client = None
try:
    client = paramiko.Transport(hostname, port)
    client.connect(username=username, password=password)
except Exception as e:
    client.close()
    return 'Cannot connect to SFTP server: ' + str(e.args[-1]), []
# Go
sftp = paramiko.SFTPClient.from_transport(client)

Answer 1

在异常中，您正在调用方法client.close() ，因为方法client.connect ，该方法将引发错误，请删除此方法或为每个可能的错误创建一个例外，以进行代码处理该特定错误。