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Write YAML File In Pythonyml in write mode and use the YAML packages' dump method to write the YAML document to the file. Save the config.py and run the file using the below command or using the play icon in the IDE. We see that the above command prints the contents of config.
A YAML file is a text document that contains data formatted using YAML (YAML Ain't Markup Language), a human-readable data format used for data serialization. It is used for reading and writing data independent of a specific programming language.
YAML is a digestible data serialization language often used to create configuration files with any programming language. Designed for human interaction, YAML is a strict superset of JSON, another data serialization language.
import yaml
data = dict(
A = 'a',
B = dict(
C = 'c',
D = 'd',
E = 'e',
)
)
with open('data.yml', 'w') as outfile:
yaml.dump(data, outfile, default_flow_style=False)
The default_flow_style=False parameter is necessary to produce the format you want (flow style), otherwise for nested collections it produces block style:
A: a
B: {C: c, D: d, E: e}
Link to the PyYAML documentation showing the difference for the default_flow_style parameter.
To write it to a file in block mode (often more readable):
d = {'A':'a', 'B':{'C':'c', 'D':'d', 'E':'e'}}
with open('result.yml', 'w') as yaml_file:
yaml.dump(d, yaml_file, default_flow_style=False)
produces:
A: a
B:
C: c
D: d
E: e
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