Here is a bash-only parser that leverages sed and awk to parse simple yaml files: function parse_yaml { local prefix=$2 local s=”[[:space:]]*” w='[a-zA-Z0-9_]*’ fs=$(echo @|tr @ ‘\034’) sed -ne “s|^\($s\):|\1|” \ -e “s|^\($s\)\($w\)$s:$s[\”‘]\(.*\)[\”‘]$s\$|\1$fs\2$fs\3|p” \ -e “s|^\($s\)\($w\)$s:$s\(.*\)$s\$|\1$fs\2$fs\3|p” $1 | awk -F$fs ‘{ indent = length($1)/2; vname[indent] = $2; for (i in vname) {if (i > indent) … Read more
TL;DR You want this: AAPL: – shares: -75.088 date: 11/27/2015 – shares: 75.088 date: 11/26/2015 Mappings The YAML equivalent of a JSON object is a mapping, which looks like these: # flow style { foo: 1, bar: 2 } # block style foo: 1 bar: 2 Note that the first characters of the keys in … Read more
Quotes: “url: http://www.some-site.example/” To clarify, I meant “quote the value” and originally thought the entire thing was the value. If http://www.some-site.example/ is the value, just quote it like so: url: “http://www.some-site.example/”
No, standard YAML does not include any kind of “import” or “include” statement.
You could try the search feature in pip, $ pip search yaml which looks for packages in PyPI with yaml in the short description. That reveals various packages, including PyYaml, yamltools, and PySyck, among others (Note that PySyck docs recommend using PyYaml, since syck is out of date). Now you know a specific package name, … Read more
You can have a regular Python module, say config.py, like this: truck = dict( color=”blue”, brand = ‘ford’, ) city = ‘new york’ cabriolet = dict( color=”black”, engine = dict( cylinders = 8, placement=”mid”, ), doors = 2, ) and use it like this: import config print(config.truck[‘color’])
The nature and even existence of file extensions is platform-dependent (some obscure platforms don’t even have them, remember) — in other systems they’re only conventional (UNIX and its ilk), while in still others they have definite semantics and in some cases specific limits on length or character content (Windows, etc.). Since the maintainers have asked … Read more
After a brief review of the YAML cookbook cited in the question and some testing, here’s my interpretation: In general, you don’t need quotes. Use quotes to force a string, e.g. if your key or value is 10 but you want it to return a String and not a Fixnum, write ’10’ or “10”. Use … Read more
Technically YAML is a superset of JSON. This means that, in theory at least, a YAML parser can understand JSON, but not necessarily the other way around. See the official specs, in the section entitled “YAML: Relation to JSON”. In general, there are certain things I like about YAML that are not available in JSON. … Read more
The easiest and purest method without relying on C headers is PyYaml (documentation), which can be installed via pip install pyyaml: #!/usr/bin/env python import yaml with open(“example.yaml”, “r”) as stream: try: print(yaml.safe_load(stream)) except yaml.YAMLError as exc: print(exc) And that’s it. A plain yaml.load() function also exists, but yaml.safe_load() should always be preferred to avoid introducing … Read more