eval() always make me nervous. In this particular case, I think you can do it as below:
```
for param in [remote_ip, vm1_ip, vm2_ip, eth_card_no, eth_config_file, persistent_net_file]:
    if param.count("ENTER.YOUR")
```

startswith() will hide one error if we place one space before value in config file such as:
```
remote_ip= ENTER.YOUR...
```
There is a space before ENTER, it does not startswith ENTER but we should skip the case.

Thanx.