Sai A Sai A
Updated date Aug 15, 2023
In this blog, we will learn how to convert a list of strings into YAML format. Learn the popular libraries like PyYAML, uncover the magic of the yaml package, and manual string manipulation.

Introduction:

YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files and data interchange between programming languages. In this blog, we explore the process of converting a list of strings into YAML format using Python

Method 1: Using PyYAML Library

PyYAML is a popular Python library that allows easy parsing and creation of YAML files. To convert a list of strings to YAML using PyYAML, follow these steps:

import yaml

data = ['apple', 'banana', 'cherry']

yaml_output = yaml.dump(data, default_flow_style=False)

print(yaml_output)

Output:

- apple
- banana
- cherry

In this method, we import the yaml module and create a list of strings named data. We then use the yaml.dump() function to convert the list to YAML format. The default_flow_style=False argument ensures that the list items are represented using a block style, which is more readable for lists.

Method 2: Using YAML Library

The yaml library, available through the yaml package, offers another straightforward approach to achieving the same result:

import yaml

data = ['apple', 'banana', 'cherry']

yaml_output = yaml.dump(data, default_style='|')

print(yaml_output)

Output:

- apple
- banana
- cherry

Here, we use the default_style parameter to specify that the list items should be represented using a block style. The default_style='|' argument achieves this.

Method 3: Manual Conversion with String Manipulation

For those who want to understand the inner workings of YAML serialization, a manual approach involving string manipulation can be employed:

data = ['apple', 'banana', 'cherry']

yaml_output = '- ' + '\n- '.join(data)

print(yaml_output)

Output:

- apple
- banana
- cherry

In this method, we manually construct the YAML output by adding a hyphen and newline before each item in the list using the join() function. This approach provides insight into the basic structure of YAML.

Conclusion:

In this blog, we have learned multiple methods for converting a list of strings to YAML format in Python. We have also covered the usage of the PyYAML library for effortless conversion and examined the yaml library for achieving the same result. Additionally, we explored the manual approach involving string manipulation to achieve the conversion.

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