Integers in yaml

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Already on GitHub? Sign in to your account. Starting a numeric sequence with zero indicates an octal number. Numeric sequences that start with zero and contain numbers higher than 7 are invalid integers and should be parsed as strings even when they do not have quotes around them.

I'm seeing this issue in an unlucky git commit hash that contained only digits Python serializes it to an unquoted string, which I don't like but is technically okay I believe. This would be awesome to have resolved, docker-compose. Merged PR doesn't actually fix this issue. IOW, Octal integers are disallowed. As is '-0'.

integers in yaml

That's not actually the case. That shows the canonical form of an integer. The actual regexp is defined in section The actual bug here is that go-yaml is interpreting the number as octal YAML uses a 0o prefix for octal numbers, which go-yaml doesn't understand not decimal. However, it seems that many existing parsers do indeed treat "" as a string, not an integer, despite the spec, so it may be wise to do that anyway.

This needs to be handled differently when parsing YAML 1. In YAML 1. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up.

YAML Tutorial: Everything You Need to Get Started in Minutes

New issue. Jump to bottom. Copy link Quote reply. This was referenced Feb 9, This comment has been minimized. Sign in to view. This is an issue for me.It is commonly used for configuration files and in applications where data is being stored or transmitted. Custom data types are allowed, but YAML natively encodes scalars such as stringsintegersand floatslistsand associative arrays also known as maps, dictionaries or hashes.

These data types are based on the Perl programming language, though all commonly used high-level programming languages share very similar concepts.

The colon-centered syntax, used for expressing key-value pairsis inspired by electronic mail headers as defined in RFCand the document separator "" is borrowed from MIME RFC Escape sequences are reused from Cand whitespace wrapping for multi-line strings is inspired by HTML.

Support for reading and writing YAML is available for many programming languages. The official recommended filename extension for YAML files has been. A cheat sheet and full specification are available at the official site. YAML offers an "in-line" style for denoting associative arrays and lists.

Here is a sample of the components.

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Strings do not require quotation marks. By default, the leading indentation of the first line and trailing whitespace is stripped, though other behavior can be explicitly specified.

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Objects and lists are important components in yaml and can be mixed. The first example is a list of key-value objects, all people from the Smith family. The second lists them by gender; it is a key-value object containing two lists. Two features that distinguish YAML from the capabilities of other data-serialization languages are structures [17] and data typing.

YAML structures enable storage of multiple documents within a single file, usage of references for repeated nodes, and usage of arbitrary nodes as keys. References to the anchor work for all data types see the ship-to reference in the example below. Below is an example of a queue in an instrument sequencer in which two steps are reused repeatedly without being fully described each time.

Data types can be divided into three categories: core, defined, and user-defined. Core are ones expected to exist in any parser e. Many more advanced data types, such as binary data, are defined in the YAML specification but not supported in all implementations.

Finally YAML defines a way to extend the data type definitions locally to accommodate user-defined classes, structures or primitives e.

integers in yaml

YAML autodetects the datatype of the entity, but sometimes one wants to cast the datatype explicitly.Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Skip to content. Labels 6 Milestones 0. Labels 6 Milestones 0 New issue. Error message misleading in most implementations 52 opened Apr 2, by Misiur.

Block comments. Merging sequences like Merge keys for mappings 48 opened May 27, by perlpunk. Typo in YAML 1. Document extension 42 opened Jan 19, by ghost. Website: link to Syck got hijacked 40 opened Apr 20, by wbazant. Directives 38 opened May 1, by boustrophedon. Specification Revision Changelist 37 opened Apr 28, by peter-scott.

Clarification over serialization process 36 opened Apr 4, by amihaiemil. Yaml 1. Datetime as key 33 opened Nov 26, by adius. YAML 1. Block commenting 27 opened May 31, by termlen0. Double-Quoted Style 26 opened Apr 12, by dnsl Big integers in JavaScript 25 opened Apr 5, by puzrin. Previous 1 2 Next. Previous Next. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window.Strings, integers, floats, timestamps.

Adding and Subtracting Integers

These are the types of data that our data structures are fundamentally constructed from. YAML supports many of the basic types which are included in Ruby's standard library.

Here is a sequence containing each of these types, respectively:. The triple dash '' in the above outputs is the YAML separator. Documents which contain a single collection such as the Collections examples on the last page don't require a separator. The above examples are not collections, so they require a separator. Basic types which begin with an alphanumeric character are Strings if they don't fall into one of the above categories.

Strings which span several lines can be represented in YAML as blocks. The block is then dumped into a new level of indentation:. By default, it will attempt to fold your text. If your text has indented portions, it will leave the text as-is and present it as a literal block:. Blocks are great because you can use all of the indicator characters freely without needing to escape them.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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I'm using Ansible to deploy a webapp. I want the task to be tried a few times before failing.

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I had the same issue and tried a bunch of things that didn't work so for some time I just worked around without using a variable but found the answer so for everyone who has it. However, if you are running a little older version of Ansible it won't work. So make sure you update Ansible. I tested on 1. You should be able to convert it to an integer with the int filter :. I have faced a similar issue, in my case I wanted to restart celeryd service.

The YAML Format

It sometimes takes a very long time to restart and I wanted to give it max 30 seconds for a soft restart, then force-restart it. I used async for this polling for restart result every 5 seconds. And then I use above in the playbook as handlers to a task restart celeryd is always first in notify list. In your case something like below could possibly work.

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Haven't checked whether it does but it might give you some hack idea to solve it in a different way. Also since you will be ignoring errors in the 1st task, you need to make sure that things are fine in 2nd:.

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Learn more. Asked 5 years, 2 months ago. Active 2 months ago. Viewed 42k times.

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Issue is, I want the number of retries to be taken from a variable. Alexis Seigneurin Alexis Seigneurin 1, 2 2 gold badges 11 11 silver badges 20 20 bronze badges.

What version of ansible are you using? I'm using version 1. Ah, looks like this issue has already been reported: github. Active Oldest Votes. Michal Gasek Michal Gasek 4, 1 1 gold badge 14 14 silver badges 19 19 bronze badges. Wow, I had already tried a similar option and your suggestion looked very promising. Issue is, the async option is for long running commands and the task ends right after the first request. You're right, too bad Too much hacking right now to get a simple thing done.This YAML tutorial will demonstrate the language syntax with a guide and some simple coding examples in Python.

YAML has broad language support and maps easily into native data structures. The file starts with three dashes. These dashes indicate the start of a new YAML document. YAML supports multiple documents, and compliant parsers will recognize each set of dashes as the beginning of a new one. Next, we see the construct that makes up most of a typical YAML document: a key-value pair. YAML supports more than just string values. The file starts with six key-value pairs. They have four different data types.

Doe and ray are strings. Pi is a floating-point number. Xmas is a boolean. French-hens is an integer. You can enclose strings in single or double-quotes or no quotes at all. YAML recognizes unquoted numerals as integers or floating point. The seventh item is an array. Calling-birds has four elements, each denoted by an opening dash. I indented the elements in calling-birds with two spaces. Indentation is how YAML denotes nesting. The number of spaces can vary from file to file, but tabs are not allowed.

Finally, we see xmas-fifth-daywhich has five more elements inside it, each of them indented. We can view xmas-fifth-day as a dictionary that contains two string, two integers, and another dictionary. YAML supports nesting of key-values, and mixing types. Unless otherwise indicated, newlines indicate the end of a field. You structure a YAML document with indentation. The indentation level can be one or more spaces.

The specification forbids tabs because tools treat them differently. You can find a processor for your favorite platform here. We can see from the output that our document is a python dictionary with two strings and another dictionary nested inside it.

Comments begin with a pound sign. They can appear after a document value or take up an entire line. They act like the scalar types in languages like Perl, Javascript, and Python. Every item in a YAML document is a member of at least one dictionary. The key is always a string. The value is a scalar so that it can be any datatype. YAML recognizes numeric types. We saw floating point and integers above.

YAML supports several other numeric types. As you expect, Ox indicates a value is hex, and a leading zero denotes an octal value.Specifically, it implements the minimum set of features needed to use YAML as a configuration file format.

Strings in YAML can be wrapped both in single and double quotes. In some cases, they can also be unquoted:. Quoted styles are useful when a string starts or end with one or more relevant spaces, because unquoted strings are trimmed on both end when parsing their contents.

Quotes are required when the string contains special or reserved characters. When using single-quoted strings, any single quote ' inside its contents must be doubled to escape it:. Strings containing any of the following characters must be quoted. If the string contains any of the following control characters, it must be escaped with double quotes:.

integers in yaml

Finally, there are other cases when the strings must be quoted, no matter if you're using single or double quotes:. When a string contains line breaks, you can use the literal style, indicated by the pipeto indicate that the string will span several lines. In literals, newlines are preserved:. Notice the two spaces before each line in the previous examples. They won't appear in the resulting PHP strings.

Booleans in YAML are expressed with true and false. A YAML file is rarely used to describe a simple scalar. Most of the time, it describes a collection.

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There is one important thing you need to remember when using indentation in a YAML file: Indentation must be done with one or more spaces, but never with tabulators. YAML can also use flow styles for collections, using explicit indicators rather than indentation to denote scope.

A sequence can be written as a comma separated list within square brackets [] :. Comments can be added in YAML by prefixing them with a hash mark :.

integers in yaml

Comments are ignored by the YAML parser and do not need to be indented according to the current level of nesting in a collection. Disneyland Paris Dec. Lille France February 28 Paris France TBA. Warszawa Poland October Berlin Germany Oct. Maintained 3. In some cases, they can also be unquoted: 1 2 3 4 5.


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