Python list of dictionaries find key8/14/2023 In more realistic scenarios, lists would come either from group_vars or from calls to Ansible modules. The following playbook contains two predefined hardcoded lists. According to the Ansible documentation, "dot notation can cause problems because some keys collide with attributes and methods of Python dictionaries." Work with lists In some places, you may find dot notation, like rockers.drums, but this is not recommended. If I want to point to a specific entry, I can use the bracket notation rockers to get the "John Bonham" string. Here is one way to define a simple dictionary: vars: They differ from a list because they are keyed using a string, not a number. What are dictionaries?ĭictionaries are the equivalent of hashes. Later on, I will discuss methods to inspect, compare, and loop through lists. The second element is bands and so forth. So if I want to use the first entry, bands, I use bands. Lists are indexed by numbers (starting with zero). The values bands and bands2 are equivalent. The term "list" is self-explanatory, but here are some ways to represent lists: vars:īands2: Lists are the equivalent of an array, something used in many real programming languages ( which Ansible is not). This article covers analyzing and using the data in lists and dictionaries, which is crucial for anything you want to do with Ansible. In addition, Ansible uses lists and dictionaries to exchange data within processes and with third parties. After all, they are all part of YAML, which administrators use to create Ansible playbooks. When you're working with Ansible, it's inevitable that you'll deal with lists and dictionaries.
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