How do I parse a yaml string with python?

Question

I see an API and many examples on how to parse a yaml file but what about a string?

FYI YAML is not safe. It is susceptible to vulnerabilities that allows the user to execute code on your servers youtube.com/watch?v=LrW-HSHP0ws — AlanSTACK
– AlanSTACK, Commented May 5, 2018 at 5:59
@AlanSTACK thanks for the heads up, I was looking for a quick way to try some things, in particular how multi-line strings are parsed in yaml. — gae123
– gae123, Commented May 5, 2018 at 6:02
@KlausD. this remark would have been more appropriate if there was something obvious to try. yaml.load/safe_load is polymorphic in what it accepts, but if all the examples show files, leaves one to look for something else to handle strings, as json does it with load/loads. Hard to try using a function that doesn't exist and there's nothing wrong with ... just asking a question. — JL Peyret
– JL Peyret, Commented Aug 12, 2020 at 7:03

Mateen Ulhaq · Accepted Answer · 2023-04-13 00:59:50Z

Here is the best way I have seen so far demonstrated with an example:

import yaml dct = yaml.safe_load(''' name: John age: 30 automobiles: - brand: Honda type: Odyssey year: 2018 - brand: Toyota type: Sienna year: 2015 ''') assert dct['name'] == 'John' assert dct['age'] == 30 assert len(dct["automobiles"]) == 2 assert dct["automobiles"][0]["brand"] == "Honda" assert dct["automobiles"][1]["year"] == 2015

if you need to install the library, be aware that it is pip install pyyaml but import yaml

Tomas Tomecek · Accepted Answer · 2020-01-03 14:26:36Z

You don't need to wrap the string in StringIO, the safe_load method accepts strings:

In [1]: yaml.safe_load("{1: 2}") Out[1]: {1: 2}

Collectives™ on Stack Overflow

How do I parse a yaml string with python?

2 Answers 2

3 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Linked

Related