Yaml formatter python plus#

YAML targets many of the same communications applications as Extensible Markup Language (XML) but has a minimal syntax which intentionally differs from Standard Generalized Markup Language (SGML). It is commonly used for configuration files and in applications where data is being stored or transmitted. import yamlĭictionary = yaml.YAML ( / ˈ j æ m ə l/) ( see § History and name) is a human-readable data-serialization language. You'll usually use the end document operator when a file contains multiple documents. For example, Java's Jackson will not process a YAML document without the start, but Python's PyYAML will. Some YAML processors require the document start operator. bar: |-Ī document starts with three dashes and ends with three periods. To strip the character, use the strip operator. So, if the value ends with whitespace, like a newline, YAML will preserve it.

Yaml formatter python plus#

To save the last character, add a plus to the fold or block operators. YAML has the strip chomp and preserve chomp operators. Multiline values may end with whitespace, and depending on how you want the document to be processed you might not want to preserve it. Īnd, of course, they can be nested and hold any value. I'll throw it in this handy JSON to YAML converter. Before we take a deeper dive, let's look at how this document looks in JSON. YAML supports nesting of key-values, and mixing types. We can view “xmas-fifth-day” as a dictionary that contains two string, two integers, and another dictionary. Finally, we see “xmas-fifth-day”, which has five more elements inside it, each of them indented. We'll look at how indentation works below. The number of spaces can vary from file to file, but tabs are not allowed. I indented the elements in “calling-birds” with two spaces. The “calling-birds” has four elements, each denoted by an opening dash.

YAML recognizes unquoted numerals as integers or floating point. You can enclose strings in single(‘) or double-quotes(“) or no quotes at all. The file starts with six key-value pairs. YAML supports more than just string values. The “doe” is a key that points to a string value: “a deer, a female deer”. Next, we see the construct that makes up most of a typical YAML document: a key-value pair. YAML supports multiple documents, and compliant parsers will recognize each set of dashes as the beginning of a new one. These dashes indicate the start of a new YAML document.

Let's take a look at a YAML file for a brief overview.

But the maintainers renamed it to YAML Ain't Markup Language to place more emphasis on its data-oriented features. The YAML acronym was shorthand for Yet Another Markup Language. It's also easy for humans to read, which is why it's a good choice for configuration. YAML has broad language support and maps easily into native data structures. This YAML tutorial will demonstrate the language syntax with a guide and some simple coding examples in Python. It's often used as a format for configuration files, but its object serialization abilities make it a viable replacement for languages like JSON. YAML Ain't Markup Language ( YAML) is a data serialization language that is consistently listed as one of the most popular programming languages.