如何讓Python更新YAML的變量？

Question

我想從蟒蛇值，把它們放在YAML：

import ruamel.yaml 

file_name = 'input.yml' 
from ruamel.yaml.util import load_yaml_guess_indent 

config, ind, bsi = load_yaml_guess_indent(open(file_name)) 

instances = config['instances'] 
print instances 
instances['hostname'] = raw_input('What is the host name>>') 
instances['syslog'] = raw_input ('what is the Syslog ip address>>') 
instances['prefix'] = raw_input('What is the first prefix>>') 
instances['prefix'] = raw_input ('what is the second address>>') 

input.yml：

--- 
instances: 
     hostname: <name>    # update with IP 
     syslog: <ip> # update with user name 
     interfaces: 
     - name: GigabitEthernet0/0 
      prefix: <first prefix>   
     - name: GigabitEthernet0/1 
      prefix: <second prefix> 

主機和系統日誌部分工作，但我不能讓前綴工作。

Answer 1

此：

instances['prefix'] = raw_input('What is the first prefix>>') 
instances['prefix'] = raw_input ('what is the second address>>') 

不工作（如果它願意，你會更新兩次同樣的事情）。你需要考慮到prefix是序列（Python的list）的元素上的鍵是該鍵interfaces值：

instances['interfaces'][0]['prefix'] = raw_input('What is the first prefix>>') 
instances['interfaces'][1]['prefix'] = raw_input ('what is the second address>>')