python use Pyyaml and keep format

Question

Here is a config file, I use PyYAML to change some value from it and then I write some config, but it will change my format, it confuses me.

 $ results.yaml          


        

Answer 1

ruamel implements a round-trip loader and dumper, try:

import ruamel.yaml
conf = open("results.conf", "r")
results = ruamel.yaml.load(conf, ruamel.yaml.RoundTripLoader)
conf.close()
results['nas']['mount_dirs'][0] = "haha"
with open('/home/zonion/speedio/speedio.conf', 'w') as conf:
  ruamel.yaml.dump(results, conf, ruamel.yaml.RoundTripDumper)